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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 26320
Location: Livermore CA USA
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 Posted: Tue Apr 27, 2010 8:30 pm Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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On the third taxi test, I headed out to the main runway at Livermore, 25R and ask the tower for a high-speed taxi test with no take off. It was approved as requested and went great. There was about a 15-20 knot head wind at about 270 which made it even more fun. The RV-8 handled great and it was definitely ready to take off. I only got to about 1/3 power and it would have taken off with about 1/2 throttle probably. Oh my... What will FULL throttle be like!? Now that's exciting! Be sure to watch the Part 2 of this video because as the music gets more intense, so does the testing!
Third Taxi Test - Part 1
http://www.youtube.com/MattsRV8?v=pnz31m6aVEQ
After the taxi back on the regular taxi way, the tower offered to let me run back the other direction on the runway! I wasn't sure that's really what he was suggesting and I had to verify that's what he really meant. It was pretty cool and saved a lot of time. With the 15-20 knot tailwind, though, I probably would have been better off just using the taxi way. Now you'll notice the music is getting a bit more intense. Be sure to watch Part 3 because that's where this taxi test REALLY get's interesting...
Third Taxi Test - Part 2
http://www.youtube.com/MattsRV8?v=5zheOkSHfX4
As you'll see in that part of the third taxi test, I lost the brakes. As I'm taxing off the runway I noticed that there was smoke coming out of both the left and right sides. At the time, I really wasn't sure what caused the brakes to get so hot. But, after watching the video a couple of time and recalling back to what I was doing, I'm positive that I was dragging the brakes on those down-wind trips. I even remember thinking at one point, "oh, I'm riding the brakes". Doesn't seem like they should get so hot as to start smoking, but perhaps it was a combination of being new, over worked, and a bit of brake fluid leaking out and hitting the discs. Anyway, my comment at the end of the video is kind of funny. It wasn't at the time, mind you... 
Third Taxi Test - Part 3
http://www.youtube.com/MattsRV8?v=57W-O8905cg
After I hosed the wheel pants and brakes down and got things cooled off and no longer smoking, I had to push the plane back to the hangar from the wash rack, which isn't too far, but still kind of a long ways at the end of a day. As I was pushing it back I noticed that there was brake fluid leaking out of the right brake. I pushed the plane about 1/2 the way into the hangar and took the wheel pants off. Once I got the leaks stopped, I pushed the plane the rest of the way in. It was kind of a demoralizing sight to see the brake calipers smoked like that, but it could have been a lot worse.
A word to the wise - STAY OFF THE BRAKES!!! Its really easy to drag them and this video is a document to what can happen.
Third Taxi Test - Epilogue
http://www.youtube.com/MattsRV8?v=JlQjRWnbO2c
The brakes were pretty toasted as were the sidewalls of the tires. There were little bits of rubber coming off the sidewall around the wheel. The brake pads definitely looked worn down some compared to the set I have on the partially completed RV-4. So in the interest of not holding up the test flight progress, I opted to use the wheels, brakes, and tires from the RV-4 project to replace the smoked components on the RV-8. I'll order a new set for the RV-4 later.
I spent the day jacking up the plane and swapping pieces. I also took the opportunity to remove the right master cylinder and fix the pesky high-pressure side leak. Here's a video of the wheels, brakes, and tires all replaced and ready for testing.
Third Taxi Test - Post Epilogue
http://www.youtube.com/MattsRV8?v=dL92Hwi0xnE
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: Test Flying
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Vanremog(at)aol.com
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| Posted: Tue Apr 27, 2010 10:14 pm Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Matt-
Since you're a smart guy, and you monitor the lists here, you of course know that this could have burned your aircraft to the ground. We have had this discussion before and you must certainly aware that you should be using Viton o-rings in the calipers and MIL-PRF-83282 fluid (not MIL-H-5606) if you wish to be safe over the long haul (particularly when trying to hold back all of that horsepower you have on the firewall). The rest of you can do as you wish, but be advised.
-GV
In a message dated 4/27/2010 9:33:19 P.M. Pacific Daylight Time, dralle(at)matronics.com writes:
| Quote: | | A word to the wise - STAY OFF THE BRAKES!!! Its really easy to drag them and this video is a document to what can happen. |
[quote][b]
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chaskuss(at)yahoo.com
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| Posted: Wed Apr 28, 2010 2:52 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Matt,
Your brake rotors are mostly likely now warped and unusable, due to the severe overheat. One more item to check and most likely replace.
Charlie Kuss
--- On Wed, 4/28/10, Matt Dralle <dralle(at)matronics.com> wrote:
| Quote: | From: Matt Dralle <dralle(at)matronics.com>
Subject: Third Taxi Test Video (Brakes Over Heat!)...
To: rv-list(at)matronics.com, rv8-list(at)matronics.com, rv7-list(at)matronics.com
Date: Wednesday, April 28, 2010, 12:29 AM
On the third taxi test, I headed out to the main runway at
Livermore, 25R and ask the tower for a high-speed taxi test
with no take off. It was approved as requested and
went great. There was about a 15-20 knot head wind at
about 270 which made it even more fun. The RV-8
handled great and it was definitely ready to take off.
I only got to about 1/3 power and it would have taken off
with about 1/2 throttle probably. Oh my... What
will FULL throttle be like!? Now that's exciting! Be
sure to watch the Part 2 of this video because as the music
gets more intense, so does the testing!
Third Taxi Test - Part 1
http://www.youtube.com/MattsRV8?v=pnz31m6aVEQ
After the taxi back on the regular taxi way, the tower
offered to let me run back the other direction on the
runway! I wasn't sure that's really what he was
suggesting and I had to verify that's what he really meant.
It was pretty cool and saved a lot of time. With the 15-20
knot tailwind, though, I probably would have been better off
just using the taxi way. Now you'll notice the music is
getting a bit more intense. Be sure to watch Part 3
because that's where this taxi test REALLY get's
interesting...
Third Taxi Test - Part 2
http://www.youtube.com/MattsRV8?v=5zheOkSHfX4
As you'll see in that part of the third taxi test, I lost
the brakes. As I'm taxing off the runway I noticed
that there was smoke coming out of both the left and right
sides. At the time, I really wasn't sure what caused
the brakes to get so hot. But, after watching the
video a couple of time and recalling back to what I was
doing, I'm positive that I was dragging the brakes on those
down-wind trips. I even remember thinking at one
point, "oh, I'm riding the brakes". Doesn't seem like they
should get so hot as to start smoking, but perhaps it was a
combination of being new, over worked, and a bit of brake
fluid leaking out and hitting the discs. Anyway, my comment
at the end of the video is kind of funny. It wasn't at the
time, mind you...
Third Taxi Test - Part 3
http://www.youtube.com/MattsRV8?v=57W-O8905cg
After I hosed the wheel pants and brakes down and got
things cooled off and no longer smoking, I had to push the
plane back to the hangar from the wash rack, which isn't too
far, but still kind of a long ways at the end of a
day. As I was pushing it back I noticed that there was
brake fluid leaking out of the right brake. I pushed
the plane about 1/2 the way into the hangar and took the
wheel pants off. Once I got the leaks stopped, I
pushed the plane the rest of the way in. It was kind
of a demoralizing sight to see the brake calipers smoked
like that, but it could have been a lot worse.
A word to the wise - STAY OFF THE BRAKES!!! Its
really easy to drag them and this video is a document to
what can happen.
Third Taxi Test - Epilogue
http://www.youtube.com/MattsRV8?v=JlQjRWnbO2c
The brakes were pretty toasted as were the sidewalls of the
tires. There were little bits of rubber coming off the
sidewall around the wheel. The brake pads definitely
looked worn down some compared to the set I have on the
partially completed RV-4. So in the interest of not
holding up the test flight progress, I opted to use the
wheels, brakes, and tires from the RV-4 project to replace
the smoked components on the RV-8. I'll order a new
set for the RV-4 later.
I spent the day jacking up the plane and swapping
pieces. I also took the opportunity to remove the
right master cylinder and fix the pesky high-pressure side
leak. Here's a video of the wheels, brakes, and tires
all replaced and ready for testing.
Third Taxi Test - Post Epilogue
http://www.youtube.com/MattsRV8?v=dL92Hwi0xnE
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV
YouTube Channel
Status: Test Flying
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Charles Heathco
Joined: 10 Jan 2006
Posts: 201
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| Posted: Wed Apr 28, 2010 4:37 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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It is easy to accidently ride the brakes unconciously. especially riding rt on takeoff. Barefoot billy rode with me on transition flights and taught me to place my feet on sides of rudder pedals on takeoff. If needed you can still hold some ri brake, and you are aware of it. My technique is to power up as I'm turning onto runway and tork pulls me straight and by that time the rudder is ready to work and I dont need rt brake. Charlie H
[quote][b]
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Ollie Washburn
Joined: 10 Jan 2006
Posts: 56
Location: Central Florida
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| Posted: Wed Apr 28, 2010 5:07 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Matt,
Many have said and I think Van himself says, do not do high speed taxi tests. What does it prove and you are certainly not doing any favors to an engine that is not broken in.
Ollie
On Wed, Apr 28, 2010 at 8:34 AM, cheathco <cheathco(at)cox.net (cheathco(at)cox.net)> wrote:
| Quote: | It is easy to accidently ride the brakes unconciously. especially riding rt on takeoff. Barefoot billy rode with me on transition flights and taught me to place my feet on sides of rudder pedals on takeoff. If needed you can still hold some ri brake, and you are aware of it. My technique is to power up as I'm turning onto runway and tork pulls me straight and by that time the rudder is ready to work and I dont need rt brake. Charlie H
| Quote: |
t="_blank">http://www.matronics.com/Navigator?RV-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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--
From Central Florida,
Ollie
[quote][b]
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Ollie RV6-A & Rans S7S
Central FL |
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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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| Posted: Wed Apr 28, 2010 5:44 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Matt,
The brake fluid "leak" at the reservoir was probably fluid that was forced
up thru the vent when the fluid got hot and expanded. There should be no
need for sealant on the treads of the vent plug as fluid will escape thru
the ventcap anyway if it gets that high in the reservoir.
My experience with my 6A is that I will get overflow, that runs down the
firewall, if I keep the fluid level at the top of the reservoir. Just the
normal warming of the fluid during taxi will cause enough expansion of the
fluid even without overheating of the brakes. I live in an airpark and have
a rather long taxi to the runway. I now keep the brake fluid level about 1/2
inch below the top.
Dale Ensing
RV-6A N118DE
Aero Plantation NC
---
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Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Wed Apr 28, 2010 6:23 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Some comments and observations .... not Matt-bashing.
Ollie gets the gold star. High speed taxi tests don't accomplish
anything, and often leads to off-surface excursions and unplanned flight.
I'm not convinced that Matt was dragging the brakes during the testing
... just stopping and turning around generates an enormous amount of
heat. Repetition, without letting the brakes cool down, is more than
enough energy to cause a problem ... which is aggravated by the fact the
wheel/brakes are enclosed in the wheel pants.
I give Matt high marks though, for the braided lines .... I've
personally known of two fires from melted plastic lines .... a
Defiant left us in a blaze of glory and the other managed to burn the
wheel pant and start a grass fire.
I can surmise that the 'loose' fittings were fairly tight and the heat
along with the tension from the hose loop caused them to rotate and then
leak.
As for the trip back to the hangar .... after he noticed the 'fire',
Matt should have informed the tower to send the fire truck .... if there
is one. There's no penalty for declaring an emergency and a worse
outcome is a real possibility. Far easier to put out a small fire.
While I'm on the soap-box ...... the next step for most 'preflight
testing' is the crow-hop down the runway ..... lifting off and settling
back down. When you're ready to fly .... put the pedal to the metal and
go fly, and learn just how controllable your airplane is (and how to
control it!) when you have some good altitude.
My last comment ..... when you're in the first flight phase ..... talk
to a flight adviser. You can't get a better bang for the buck in aviation!
Now, for some perspective .... my good friend (now deceased)was in the
process of building and RV-8 .... and it's getting it's first flight
this Sat. I'll be getting checked out in it to help fly off the Phase 1
time. I'm looking forward to that. But I'll have a lot of dual before
I'm off on my own.
Linn
Ollie Washburn wrote:
| Quote: | Matt,
Many have said and I think Van himself says, do not do high speed taxi
tests. What does it prove and you are certainly not doing any favors to
an engine that is not broken in.
Ollie
On Wed, Apr 28, 2010 at 8:34 AM, cheathco <cheathco(at)cox.net
<mailto:cheathco(at)cox.net>> wrote:
It is easy to accidently ride the brakes unconciously. especially
riding rt on takeoff. Barefoot billy rode with me on transition
flights and taught me to place my feet on sides of rudder pedals on
takeoff. If needed you can still hold some ri brake, and you are
aware of it. My technique is to power up as I'm turning onto runway
and tork pulls me straight and by that time the rudder is ready to
work and I dont need rt brake. Charlie H
*
t="_blank">http://www.matronics.com/Navigator?RV-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
*
--
From Central Florida,
Ollie
*
*
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smittysrv
Joined: 10 Jan 2006
Posts: 67
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| Posted: Wed Apr 28, 2010 7:37 am Post subject: Re: Third Taxi Test Video (Brakes Over Heat!)... |
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I haven't finished my RV, so I don't have any advice from personal experience, but I do have a question. If the brakes stayed engaged, even after taking your foot off the pedals, would springs (like the ones I put in) help?
http://www.smittysrv.com/more_stuff.asp?ID=589
Smitty
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Smittys RV-9A
SmittysRV.com
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dcw(at)mnwing.org
Guest
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| Posted: Wed Apr 28, 2010 7:50 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Matt and others:
I have to chime in here and pass along a thought. Matt: I would highly suggest you terminate the taxi testing, get the checkout that you intended, and then go fly your airplane. I know you had Bart do an extensive break-in on your engine, but you are absolutely doing it no good taxing around on the ground with inadequate cooling. This is a large engine and it is not getting cooled properly doing what you are doing. High-speed taxis and "crow-hops: are dangerous and non-productive.
I have made 8 first RV flights on a variety of models and speak from experience.
Just my 2 cents worth.
Doug Weiler
pres, MN Wing
RV-4/RV-7
Linn Walters wrote: [quote]--> RV-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net> (pitts_pilot(at)bellsouth.net)
Some comments and observations .... not Matt-bashing.
Ollie gets the gold star. High speed taxi tests don't accomplish anything, and often leads to off-surface excursions and unplanned flight.
I'm not convinced that Matt was dragging the brakes during the testing ... just stopping and turning around generates an enormous amount of heat. Repetition, without letting the brakes cool down, is more than enough energy to cause a problem ... which is aggravated by the fact the wheel/brakes are enclosed in the wheel pants.
I give Matt high marks though, for the braided lines .... I've personally known of two fires from melted plastic lines .... a
Defiant left us in a blaze of glory and the other managed to burn the wheel pant and start a grass fire.
I can surmise that the 'loose' fittings were fairly tight and the heat along with the tension from the hose loop caused them to rotate and then leak.
As for the trip back to the hangar .... after he noticed the 'fire', Matt should have informed the tower to send the fire truck .... if there is one. There's no penalty for declaring an emergency and a worse outcome is a real possibility. Far easier to put out a small fire.
While I'm on the soap-box ...... the next step for most 'preflight testing' is the crow-hop down the runway ..... lifting off and settling back down. When you're ready to fly .... put the pedal to the metal and go fly, and learn just how controllable your airplane is (and how to control it!) when you have some good altitude.
My last comment ..... when you're in the first flight phase ..... talk to a flight adviser. You can't get a better bang for the buck in aviation!
Now, for some perspective .... my good friend (now deceased)was in the process of building and RV-8 .... and it's getting it's first flight this Sat. I'll be getting checked out in it to help fly off the Phase 1 time. I'm looking forward to that. But I'll have a lot of dual before I'm off on my own.
Linn
Ollie Washburn wrote:
| Quote: | Matt,
Many have said and I think Van himself says, do not do high speed taxi tests. What does it prove and you are certainly not doing any favors to an engine that is not broken in.
Ollie
On Wed, Apr 28, 2010 at 8:34 AM, cheathco <cheathco(at)cox.net (cheathco(at)cox.net) <mailto:cheathco(at)cox.net> (cheathco(at)cox.net)> wrote:
It is easy to accidently ride the brakes unconciously. especially
riding rt on takeoff. Barefoot billy rode with me on transition
flights and taught me to place my feet on sides of rudder pedals on
takeoff. If needed you can still hold some ri brake, and you are
aware of it. My technique is to power up as I'm turning onto runway
and tork pulls me straight and by that time the rudder is ready to
work and I dont need rt brake. Charlie H
*
t="_blank">http://www.matronics.com/Navigator?RV-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
*
--
From Central Florida,
Ollie
*
*
|
[b]
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bigdog(at)bentwing.com
Guest
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| Posted: Wed Apr 28, 2010 8:50 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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The dual is in a different RV-8 I hope. The feds have made it crystal clear
that there are no circumstances where more than one person can be in an RV
during Phase 1.
| Quote: | looking forward to that. But I'll have a lot of dual before
I'm off on my own.
|
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Bret Smith
Joined: 09 Jan 2006
Posts: 178
Location: Mineral Bluff, GA
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| Posted: Wed Apr 28, 2010 8:50 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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That's the ticket!
Bret
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RV-9A (Emp) |
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Thu Apr 29, 2010 5:08 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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I'd give that a big 'yes'. If the pedals are a little tight, then the
master cylinder can't relax enough to clear the port and let the fluid
flow back upstream. I like your solution!
Linn
smittysrv wrote:
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Thu Apr 29, 2010 5:08 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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I was under the impression that the single person requirement was only
for the first flight. I hope someone will set me straight.
Linn
Greg wrote:
| Quote: |
The dual is in a different RV-8 I hope. The feds have made it crystal clear
that there are no circumstances where more than one person can be in an RV
during Phase 1.
> looking forward to that. But I'll have a lot of dual before
> I'm off on my own.
>
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stucklfw(at)westinghouse.
Guest
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| Posted: Thu Apr 29, 2010 5:26 am Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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| Quote: | | Matt, One other comment. Be sure that your brake pedals are not the cause of the problem.If the brake pedal hinge points have been over tightened, the result will be that thebrakes will always drag. I've seen this on several RV's. The solution is to pull allthe cotter keys on the brake pedals, loosen the castle nuts until the joints rattle,and re-install new cotter keys. The internal spring on the master cylinders aren't very strong, and anybinding of the peddle joints will result in the master cylinder plunger not fullyreturning to the relaxed position. This results in brake drag that can turn your |
0123456
789 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
0 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
1 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
2 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
3 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
4 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
5 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
6 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
7 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
8 | Quote: | | One other comment. Be sure that your brake pedals are not the cause of the problem. |
9 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
0 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
1 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
2 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
3 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
4 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
5 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
6 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
7 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
8 | Quote: | | If the brake pedal hinge points have been over tightened, the result will be that the |
9 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
0 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
1 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
2 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
3 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
4 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
5 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
6 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
7 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
8 | Quote: | | brakes will always drag. I've seen this on several RV's. The solution is to pull all |
9 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
0 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
1 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
2 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
3 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
4 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
5 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
6 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
7 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
8 | Quote: | | the cotter keys on the brake pedals, loosen the castle nuts until the joints rattle, |
9 | Quote: | | and re-install new cotter keys. |
0 | Quote: | | and re-install new cotter keys. |
1 | Quote: | | and re-install new cotter keys. |
2 | Quote: | | and re-install new cotter keys. |
3 | Quote: | | and re-install new cotter keys. |
4 | Quote: | | and re-install new cotter keys. |
5 | Quote: | | and re-install new cotter keys. |
6 | Quote: | | and re-install new cotter keys. |
7 | Quote: | | and re-install new cotter keys. |
8 | Quote: | | and re-install new cotter keys. |
9 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
0 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
1 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
2 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
3 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
4 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
5 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
6 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
7 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
8 | Quote: | | The internal spring on the master cylinders aren't very strong, and any |
9 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
0 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
1 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
2 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
3 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
4 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
5 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
6 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
7 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
8 | Quote: | | binding of the peddle joints will result in the master cylinder plunger not fully |
9 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
0 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
1 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
2 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
3 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
4 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
5 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
6 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
7 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
8 | Quote: | | returning to the relaxed position. This results in brake drag that can turn your |
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[quote][b]
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smittysrv
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Posts: 67
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jfogarty(at)tds.net
Guest
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| Posted: Thu Apr 29, 2010 12:08 pm Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Fred, That is great information, I just learned that from Tom Berge this week taking some training in his RV-7a. My bolts on the RV-9a are too tight. He said, the bolts should spin easily. The bolt is only a shaft & the cotter key will keep it on. He had this problem on his RV-6. Great stuff. Thanks for sharing.
Jim
RV-9a building
[quote] ---
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Gary.A.Sobek
Joined: 09 Jan 2006
Posts: 217
Location: SoCAL USA
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| Posted: Thu Apr 29, 2010 12:11 pm Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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NO Passageners in homebuilt aircraft during phase I test flying.
ONLY Pilot in homebuilt aircraft during phase I test flying.
Gary A. Sobek
"My Sanity" RV-6 N157GS O-320 Hartzell,
2,346+ Flying Hours So. CA, USA
[quote] Date: Wed, 28 Apr 2010 14:24:43 -0400
From: pitts_pilot(at)bellsouth.net
To: rv-list(at)matronics.com
Subject: Re: Third Taxi Test Video (Brakes Over Heat!)...
--> RV-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net>
I was under the impression that the single person requirement was only
for the first flight. I hope someone will set me straight.
Linn
Greg wrote:
> --> RV-List message posted by: "Greg" <bigdog(at)bentwing.com>
>
> The dual is in a different RV-8 I hope. The feds have made it crystal clear
> that there are no circumstances where more than one person can be in an RV
> during Phase 1.
>
>> looking forward to that. But I'll have a lot of dual before
>> I'm off on my own.
>>
>
>
>
>
>
>
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bigdog(at)bentwing.com
Guest
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| Posted: Thu Apr 29, 2010 12:14 pm Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Perhaps Das Fed can provide the reference but there was a formal response to
a question about "required crew" during Phase 1 and the answer was made very
unambiguously... Not only No but Hell No. EAA probably has it too. I think
it might have been from one of their activities or NPRM comments.
[quote] --
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dan.pat.b(at)gmail.com
Guest
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| Posted: Thu Apr 29, 2010 2:41 pm Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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Good Morning:I had an early brake issue on my RV-7A; they were dragging/over heating, although never to the extent I saw smoke. The problem and the fix turned out to be simple. It's one of those things Van doesn't tell you. Problem: I had over-torqued the fasteners holding the brake pedals to the rudder frames and cylinder assemblies. My mentor, an RV three-timer, who also did the first flight on mine, saw the problem immediately: Solution: Loosen up every bolt/nut holding the brake pedals to the rudder frames and cylinder assemblies to the point where they are no more than barely finger tight; and I do mean barely, or even less. Obviously you want to make absolutely sure you have cotter pins securing the castle nuts to the bolts. The fix took me two sweaty, uncomfortable, frustrating afternoons working with a mirror in tight, inaccessible conditions. The problem disappeared.
Dan Bergeron
RV-7A N307TB
138 hours since first flight on 8/4/09
On Wed, Apr 28, 2010 at 2:22 PM, Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)> wrote:
[quote]--> RV-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)>
I'd give that a big 'yes'. If the pedals are a little tight, then the master cylinder can't relax enough to clear the port and let the fluid flow back upstream. I like your solution!
Linn
smittysrv wrote:
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bobbyhester(at)newwavecom
Guest
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| Posted: Thu Apr 29, 2010 3:13 pm Post subject: Third Taxi Test Video (Brakes Over Heat!)... |
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The wordage is in your Operating Limitations for Phase I, this is for
the whole Phase I period.
I sure you could find it somewhere on the FAA site also. See attach jpg
----
Surfing the web from Hopkinsville, KY
Check out the latest on my website at:
http://home.newwavecomm.net/bobbyhester/RVSite.htm
Linn Walters wrote:
| Quote: |
I was under the impression that the single person requirement was only
for the first flight. I hope someone will set me straight.
Linn
Greg wrote:
>
>
> The dual is in a different RV-8 I hope. The feds have made it crystal
> clear
> that there are no circumstances where more than one person can be in
> an RV
> during Phase 1.
>> looking forward to that. But I'll have a lot of dual before I'm off
>> on my own.
>>
|
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