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tkben002
Joined: 06 Jul 2011
Posts: 54
Location: Alexandria, LA
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 Posted: Sat Aug 27, 2011 9:13 am Post subject: tailspring? |
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My tailspring is a little bent, atleast I think it is. When I look at pictures of other peoples planes the tailsprings look straight. Mine has a nice little curve to it. My question is, can I remove it, cut it off when it is bent, re insert it and have an overall shorter tailspring, or should I just call Travis and buy a new one, or are there any alternatives?
thanks,
Travis Bennett
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williamtsullivan(at)att.n
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| Posted: Sat Aug 27, 2011 9:42 am Post subject: tailspring? |
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What happens if you take the weight off it for a while? What model Kolb? Mine is a fiberglass rod, and I think they would take a "set".
Bill Sullivan
Windsor Locks, Ct.
FS 447
--- On Sat, 8/27/11, tkben002 <tkben002(at)bellsouth.net> wrote:
| Quote: |
From: tkben002 <tkben002(at)bellsouth.net>
Subject: tailspring?
To: kolb-list(at)matronics.com
Date: Saturday, August 27, 2011, 1:13 PM
--> Kolb-List message posted by: "tkben002" <[url=/mc/compose?to=tkben002(at)bellsouth.net]tkben002(at)bellsouth.net[/url]>
My tailspring is a little bent, atleast I think it is. When I look at pictures of other peoples planes the tailsprings look straight. Mine has a nice little curve to it. My question is, can I remove it, cut it off when it is bent, re insert it and have an overall shorter tailspring, or should I just call Travis and buy a new one, or are there any alternatives?
thanks,
Travis Bennett
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=350769#350769
Attachments:
http://forums.matronics.com//files/tailspring_resize_274.jpg
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[quote][b]
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elleryweld(at)aol.com
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| Posted: Sat Aug 27, 2011 9:51 am Post subject: tailspring? |
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Pick up the back of your airplane and look to see if it is bent if not cut it in half and you wont have one that looks bent I always used half of what they send you
Ellery Batchelder Jr.
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tkben002
Joined: 06 Jul 2011
Posts: 54
Location: Alexandria, LA
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| Posted: Sat Aug 27, 2011 10:00 am Post subject: Re: tailspring? |
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It is on a Kolbra. I am pretty sure it is aluminum tube. I was planning on shortening it but was not sure if there was a reason not to.
Thanks,
Travis Bennett
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byoungplumbing(at)gmail.c
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| Posted: Sat Aug 27, 2011 10:22 am Post subject: tailspring? |
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It is on a Kolbra. I am pretty sure it is aluminum tube. I was planning on
shortening it but was not sure if there was a reason not to.
Thanks,
Travis Bennett
| Quote: | >>>>>>>>>>>>>>>>>>>..
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it should be solid alum rod. i left mine full length,,, some have
shortened theirs. my thought was if the rod is shortened, it will put
more shock load on the steel frame. then on the other hand,,, when longer
there is more spring,,, but a longer moment arm which would make things
bend with less force. pick your poison.
boyd young
mkiii utah.
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slyck(at)frontiernet.net
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| Posted: Sat Aug 27, 2011 10:31 am Post subject: tailspring? |
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Mark the exit point with a felt tip and cut it there. The point where
they
eventually break, if it flexes enough times, is at that point.
You will be doing yourself a favor.
BB
On Aug 27, 2011, at 1:13 PM, tkben002 wrote:
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Sat Aug 27, 2011 11:17 am Post subject: tailspring? |
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The Slingshot is VERY tail heavy, so after bending the tail wheel rod (more than once I think), the builder fixed it permanently with a very stout leaf spring. See photo below. It is probably overkill for Kolbs with lighter tails.
On Sat, Aug 27, 2011 at 2:16 PM, b young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: | --> Kolb-List message posted by: "b young" <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)>
It is on a Kolbra. I am pretty sure it is aluminum tube. I was planning on shortening it but was not sure if there was a reason not to.
Thanks,
Travis Bennett
it should be solid alum rod. i left mine full length,,, some have shortened theirs. my thought was if the rod is shortened, it will put more shock load on the steel frame. then on the other hand,,, when longer there is more spring,,, but a longer moment arm which would make things bend with less force. pick your poison.
boyd young
mkiii utah.
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Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
- Anonymous |
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Sat Aug 27, 2011 11:35 am Post subject: tailspring? |
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One thing that will happen if you straighten the tailwheel post is that it will restore the kingpin angle to swept forward, like the manufacturer intended, to keep the tailwheel from, for lack of a better term, fluttering. Think of the wheel on a shopping cart that wobbles back and forth uncommanded as you push the cart. You can also replace the solid aluminum post with 4130 tube and it will be a little lighter. 3/4" X .065" wall will work nicely. You can also have it heat treated up to RC 130 to make it a true spring so it won't bend again.
Another thing you might consider it to change out the springs from tension to compression so you don't have to worry about the hook breaking or pulling out.
Rick Girard
On Sat, Aug 27, 2011 at 1:28 PM, End User <slyck(at)frontiernet.net (slyck(at)frontiernet.net)> wrote:
| Quote: | --> Kolb-List message posted by: End User <slyck(at)frontiernet.net (slyck(at)frontiernet.net)>
Mark the exit point with a felt tip and cut it there. The point where they
eventually break, if it flexes enough times, is at that point.
You will be doing yourself a favor.
BB
On Aug 27, 2011, at 1:13 PM, tkben002 wrote:
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Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
[quote][b]
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tkben002
Joined: 06 Jul 2011
Posts: 54
Location: Alexandria, LA
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| Posted: Sat Aug 27, 2011 12:20 pm Post subject: Re: tailspring? |
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Well, I went ahead and took it off, and yep, it was bent. So, while I had it off I cut off the first 7" or so and drilled a hole and now I have a shorter tailspring. I will try it out tomorrow to see if there are any differences (expect it to be stiffer).
Thom, What size tailwheel is that? What manufacturer?
Travis Bennett
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Sat Aug 27, 2011 12:55 pm Post subject: tailspring? |
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Travis,
My tailwheel is six inch diameter from Aviation Products, Inc. in California (from the sticker on the side), probably available thru Aircraft Spruce.
Thom
On Sat, Aug 27, 2011 at 4:20 PM, tkben002 <tkben002(at)bellsouth.net (tkben002(at)bellsouth.net)> wrote:
[quote] --> Kolb-List message posted by: "tkben002" <tkben002(at)bellsouth.net (tkben002(at)bellsouth.net)>
Well, I went ahead and took it off, and yep, it was bent. So, while I had it off I cut off the first 7" or so and drilled a hole and now I have a shorter tailspring. I will try it out tomorrow to see if there are any differences (expect it to be stiffer).
Thom, What size tailwheel is that? What manufacturer?
Travis Bennett
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=350792#350792
Attachments:
http://forums.matronics.com//files/tailspring_bent_resize_106.jpg
http://forums.matronics.com//files/tailspring_short_resize_139.jpg
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[b]
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Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
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George Alexander
Joined: 10 Jan 2006
Posts: 245
Location: SW Florida
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| Posted: Sat Aug 27, 2011 1:07 pm Post subject: Re: tailspring? |
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| tkben002 wrote: | . . . snip . . . . I will try it out tomorrow to see if there are any differences (expect it to be stiffer).
. . . snip. .
Travis Bennett |
For those of you who have done this, should he expect any difference in ground handling or takeoff/landing because of the tail being closer to the ground?
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George Alexander
FS II R503
E-LSA N709FS
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Gene Ledbetter
Joined: 10 Jan 2006
Posts: 20
Location: Cincinnati, OH
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| Posted: Sat Aug 27, 2011 1:09 pm Post subject: tailspring? |
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Travis,You have moved the tailwheel forward enough that it has moved your CG forward some amount. So be alert the next time you fly and see if you can tell any difference.
Gene
On Aug 27, 2011, at 4:52 PM, Thom Riddle wrote:
[quote]Travis,
My tailwheel is six inch diameter from Aviation Products, Inc. in California (from the sticker on the side), probably available thru Aircraft Spruce.
[b]
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Gene D.
2000 Firefly
330 Hours
New 447
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Sun Aug 28, 2011 7:09 am Post subject: tailspring? |
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No, I've done this mod on a IIIC and a IIIX. The only difference you might notice is that it will release to full caster a little easier since the shorter rod doesn't flex as much.
Rick Girard
On Sat, Aug 27, 2011 at 4:07 PM, George Alexander <gtalexander(at)att.net (gtalexander(at)att.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Alexander" <gtalexander(at)att.net (gtalexander(at)att.net)>
tkben002 wrote:
> . . . snip . . . . I will try it out tomorrow to see if there are any differences (expect it to be stiffer).
> . . . snip. .
> Travis Bennett
For those of you who have done this, should he expect any difference in ground handling or takeoff because of the tail being closer to the ground?
--------
George Alexander
FS II R503 N709FS
http://www.oh2fly.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=350797#350797
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Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
[quote][b]
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Sun Aug 28, 2011 7:18 am Post subject: tailspring? |
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It's the same as you have, just a 6" wheel instead of 4", and a spring mount instead of a rod mount.
http://www.aircraftspruce.com/catalog/lgpages/homebuilder_tailwheel.php
Rick
On Sat, Aug 27, 2011 at 3:20 PM, tkben002 <tkben002(at)bellsouth.net (tkben002(at)bellsouth.net)> wrote:
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
[quote][b]
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tkben002
Joined: 06 Jul 2011
Posts: 54
Location: Alexandria, LA
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| Posted: Tue Aug 30, 2011 1:47 pm Post subject: Re: tailspring? |
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Just figured I would give an update....
I went flying over the weekend to test out the shorter tail. As far as handling due to any CG changes there were none. However, I did not do a great job of drilling out the new hole. Acutally the hole in the tailpost is not straight, so I had to enlarge the hole in the tailspring rod so the bolt would fit thru. I tightened it down and I thought it was fine, but it wasnt. After the first flight on landing the tailwheel went to the side and there was no straightening it back to center. The landing was ok and no groundloop but the taxi back to the trailer involved some whirly doo's on the taxi way. Anyway, learning experience (and I already cut another inch off and redrilled and also ordered a new tailspring from Travis.
Travis Bennett
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zeprep251(at)aol.com
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| Posted: Wed Aug 31, 2011 2:44 pm Post subject: tailspring? |
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Travis,
This is a quick cure for the tail spring rattle and misalignment.Remove the tail spring,cut two slots in the short stub of the open end of the tail spring tube so that the clamp can compress the tube around the spring when it is tightened.The clamp is aluminum,1/2 inch thick, with 2 counter sunk cap screws that tighten from the bottom....JBM made mine but it's a simple machine shop operation.
Here is a photo.
G.Aman MK3C Jabiru 2200A 638 hrs.
[img]cid:tie_8CE364651A0BDDA_8D8_2B1F5[/img]
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zeprep251(at)aol.com
Guest
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| Posted: Wed Aug 31, 2011 5:37 pm Post subject: tailspring? |
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Travis,
I don't know how many hours you have on your plane but you should really consider installing the John Hauk braces on the tail ring.They will save you a ton of grief down the road.You can see them in that photo I posted for you. G.Aman
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