 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
Tim Olson
Joined: 25 Jan 2007
Posts: 2872
|
 Posted: Tue Mar 03, 2015 11:15 am Post subject: RV-List: Re: Infinity grip switch driving S702 starter rela |
 |
|
I know in my case I've done complete mixture cut-off tests
in the plane where I've stopped the engine completely,
and also flown it dry on tanks for testing, and the prop
keeps spinning so fast that you may even perceive that
the engine is still making power. You just feel the loss
of thrust. So unless you happen to pull the nose up and
near-stall the plane, I doubt the starter will ever need to
be cranked to re-start. For me, as soon as the fuel
supply was there again, it roared back to life.
Also, the start operation isn't *that* complicated.
I understand the want to have a hand on the stick
and one on the throttle/mixture, but my knees do a fine
job of holding the stick for a normal start.
Additionally, if the plane is in trim, I don't see
the worry about holding the stick with a hand
while doing that once-in-a-hundred-years in-flight
restart that you may do. The knees would do ok
there too, but in actuality, you're not going to be
manipulating the mixture and throttle much if you're
doing an in-flight start. It's not like you'll be
doing a hot-start procedure at 7,000'.
Tim
On 3/3/2015 12:53 PM, B Tomm wrote:
| Quote: |
Is in-flight restart really necessary? What I mean is, won't the prop
continue to windmill negating the need for the starter? Have you pulled the
mixture and tried to stop the prop (at altitude of course)?
Bevan
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
 |
ashleysc(at)broadstripe.n
Guest
|
| Posted: Tue Mar 03, 2015 5:04 pm Post subject: RV-List: Re: Infinity grip switch driving S702 starter rela |
|
|
Hi Tim;
In general, a direct drive will keep turning down to quite a slow air speed. On the other hand, many reduced drives (gear, belt) will stop dead in their tracks. If may restart by diving to pick up speed, altitude permitting, of course.
Cheers!  Stu.
On Tue, Mar 3, 2015 at 11:13 AM, Tim Olson <Tim(at)myrv10.com (Tim(at)myrv10.com)> wrote:
[quote]--> AeroElectric-List message posted by: Tim Olson <Tim(at)myrv10.com (Tim(at)myrv10.com)>
I know in my case I've done complete mixture cut-off tests
in the plane where I've stopped the engine completely,
and also flown it dry on tanks for testing, and the prop
keeps spinning so fast that you may even perceive that
the engine is still making power. You just feel the loss
of thrust. So unless you happen to pull the nose up and
near-stall the plane, I doubt the starter will ever need to
be cranked to re-start. For me, as soon as the fuel
supply was there again, it roared back to life.
Also, the start operation isn't *that* complicated.
I understand the want to have a hand on the stick
and one on the throttle/mixture, but my knees do a fine
job of holding the stick for a normal start.
Additionally, if the plane is in trim, I don't see
the worry about holding the stick with a hand
while doing that once-in-a-hundred-years in-flight
restart that you may do. The knees would do ok
there too, but in actuality, you're not going to be
manipulating the mixture and throttle much if you're
doing an in-flight start. It's not like you'll be
doing a hot-start procedure at 7,000'.
Tim
On 3/3/2015 12:53 PM, B Tomm wrote:
| Quote: | --> AeroElectric-List message posted by: "B Tomm" <fvalarm(at)rapidnet.net (fvalarm(at)rapidnet.net)>
Is in-flight restart really necessary? What I mean is, won't the prop
continue to windmill negating the need for the starter? Have you pulled the
mixture and tried to stop the prop (at altitude of course)?
Bevan
|
====================================
-
Electric-List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
====================================
FORUMS -
_blank">http://forums.matronics.com
====================================
b Site -
     -Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
====================================
[b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
Tim Olson
Joined: 25 Jan 2007
Posts: 2872
|
| Posted: Tue Mar 03, 2015 6:59 pm Post subject: RV-List: Re: Infinity grip switch driving S702 starter rela |
|
|
Yes, I've heard that today. On the upside, there aren't many gear drive RV's that I know of so I think for most of the people on the thread it's a moot point but there definitely are different cases.
Tim
On Mar 3, 2015, at 7:02 PM, Stuart Ashley <ashleysc(at)broadstripe.net (ashleysc(at)broadstripe.net)> wrote:
[quote]Hi Tim;
In general, a direct drive will keep turning down to quite a slow air speed. On the other hand, many reduced drives (gear, belt) will stop dead in their tracks. If may restart by diving to pick up speed, altitude permitting, of course.
Cheers! Stu.
On Tue, Mar 3, 2015 at 11:13 AM, Tim Olson <Tim(at)myrv10.com (Tim(at)myrv10.com)> wrote:
| Quote: | --> AeroElectric-List message posted by: Tim Olson <Tim(at)myrv10.com (Tim(at)myrv10.com)>
I know in my case I've done complete mixture cut-off tests
in the plane where I've stopped the engine completely,
and also flown it dry on tanks for testing, and the prop
keeps spinning so fast that you may even perceive that
the engine is still making power. You just feel the loss
of thrust. So unless you happen to pull the nose up and
near-stall the plane, I doubt the starter will ever need to
be cranked to re-start. For me, as soon as the fuel
supply was there again, it roared back to life.
Also, the start operation isn't *that* complicated.
I understand the want to have a hand on the stick
and one on the throttle/mixture, but my knees do a fine
job of holding the stick for a normal start.
Additionally, if the plane is in trim, I don't see
the worry about holding the stick with a hand
while doing that once-in-a-hundred-years in-flight
restart that you may do. The knees would do ok
there too, but in actuality, you're not going to be
manipulating the mixture and throttle much if you're
doing an in-flight start. It's not like you'll be
doing a hot-start procedure at 7,000'.
Tim
On 3/3/2015 12:53 PM, B Tomm wrote:
| Quote: | --> AeroElectric-List message posted by: "B Tomm" <fvalarm(at)rapidnet.net (fvalarm(at)rapidnet.net)>
Is in-flight restart really necessary? What I mean is, won't the prop
continue to windmill negating the need for the starter? Have you pulled the
mixture and tried to stop the prop (at altitude of course)?
Bevan
|
====================================
-
Electric-List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
====================================
FORUMS -
_blank">http://forums.matronics.com
====================================
b Site -
-Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
====================================
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
lectric-List"">http://www.matronics.com/Navigator?AeroElectric-List
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
//forums.matronics.com
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
ot;">http://www.matronics.com/contribution
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
|
[b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
rlborger(at)mac.com
Guest
|
| Posted: Tue Mar 03, 2015 7:23 pm Post subject: RV-List: Re: Infinity grip switch driving S702 starter rela |
|
|
Tim,
The RV-12 is powered by a Rotax engine which has a gear reduction drive. So it may be of interest to that group.
I have run the main tank dry in my Rotax 914 powered Europa and the engine continued to turn over while I switched tanks. Immediately upon switching to the reserve tank the engine restarted. I didn’t even have time to turn on the boost pump.
I haven’t tested this but I have been told that if the prop stops on a Rotax 9xx engine, you can not restart it by diving to pick up speed. Once it stops the only way to restart is with the starter. Like I said, I haven’t tested this nor am I likely to intentionally test it. YMMV.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs).
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger(at)mac.com
On Mar 3, 2015, at 8:57 PM, Tim Olson <Tim(at)MyRV10.com> wrote:
Yes, I've heard that today. On the upside, there aren't many gear drive RV's that I know of so I think for most of the people on the thread it's a moot point but there definitely are different cases.
Tim
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
