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Author Topic: Removable Stab ...  (Read 1541 times)

Offline John Leidle

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Removable Stab ...
« on: July 25, 2020, 09:03:06 AM »
  For obvious reasons my plane that is under construction is going to have a removable stab. I've never done this and have a pretty solid idea of what to do I haven't drawn it on paper though.
  I'm thinking anyone that wants to post a drawing , picture or ideas it would be great.     Some discussion might keep me from shooting myself in the foot.
  John L.
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Offline TDM

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Re: Removable Stab ...
« Reply #1 on: July 25, 2020, 09:48:21 AM »
A simple way to accomplish this is with tubes.
Put two tubes in the center section of the stab, while building the stab just like any other stab. When the stab is finished, cut it in three sections, the two stabs and the center section which gets glued in the fuselage and receives the control horn. Use some carbon fiber tube round rods to join the stabs together and a piece of tape to stop them from sliding out. Instead of tape a small piece of aluminium plane and some retaining screws will also get the job done but tape is simple reliable and light.

https://alofthobbies.com/accessories/carbon-fiber.html
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Online Brett Buck

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Re: Removable Stab ...
« Reply #2 on: July 25, 2020, 12:26:08 PM »
Quote from: John Leidle on July 25, 2020, 09:03:06 AM
  For obvious reasons my plane that is under construction is going to have a removable stab. I've never done this and have a pretty solid idea of what to do I haven't drawn it on paper though.
  I'm thinking anyone that wants to post a drawing , picture or ideas it would be great.     Some discussion might keep me from shooting myself in the foot.
  John L.

   Build a flat platform, hold the stab down with screws, make the rudder/fin fit over it. That way you can not only remove it, you can also shim it for adjustment.
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Offline pmackenzie

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Re: Removable Stab ...
« Reply #3 on: July 25, 2020, 01:12:33 PM »
Quote from: Brett Buck on July 25, 2020, 12:26:08 PM
   Build a flat platform, hold the stab down with screws, make the rudder/fin fit over it. That way you can not only remove it, you can also shim it for adjustment.

This is how I have done it as well. Got a bit tricky with the MaxBee airfoiled stab, but still doable.
Good details of this , and wing attachment, in Paul Walker's Impact article if you can find a copy.
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Online Brett Buck

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Re: Removable Stab ...
« Reply #4 on: July 25, 2020, 01:17:47 PM »
Quote from: pmackenzie on July 25, 2020, 01:12:33 PM
This is how I have done it as well. Got a bit tricky with the MaxBee airfoiled stab, but still doable.
Good details of this , and wing attachment, in Paul Walker's Impact article if you can find a copy.

  With an airfoiled stab, just build out the center section to be square.

     Brett
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Offline John Leidle

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Re: Removable Stab ...
« Reply #5 on: July 25, 2020, 10:10:44 PM »
  I just might go downstairs later tonight & dig out the Impact plans & article. I dont need to watch the Wolfman again tonight .
     Thanks, John L.
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Offline Howard Rush

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Re: Removable Stab ...
« Reply #6 on: July 26, 2020, 12:37:14 AM »
Quote from: John Leidle on July 25, 2020, 10:10:44 PM
  I just might go downstairs later tonight & dig out the Impact plans & article. I dont need to watch the Wolfman again tonight .
     Thanks, John L.

I do it like Paul's Impact article, but with four 2-56s.  I think that's what he's doing now.  Put the break in the fuselage an inch or so forward of the hinge line, letting the stab hang over the platform.  That gives better control horn access and makes the fuselage fit in a box better, should you need to put it in a box.
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Offline pmackenzie

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Re: Removable Stab ...
« Reply #7 on: July 26, 2020, 04:46:00 AM »
 ! have been using 3 x 4-40 aluminum screws, I guess that is overkill!
I like the idea of moving the break 1" forward, next time I will try that.
It is not just about access to the controls, but with a narrow fuse it can be tight fitting the horn , ball link and the slider in there and still having anything left of the bulkhead.
The 1" shorter fuse might not seem like much, but every little but helps if you are trying to keep the box as small as possible.
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Offline Dwayne Donnelly

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Re: Removable Stab ...
« Reply #8 on: July 26, 2020, 07:06:23 AM »
Where can I find Pauls article please.
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Offline John Leidle

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Re: Removable Stab ...
« Reply #9 on: July 26, 2020, 09:51:21 AM »
   Flying Models Mag  probably April or May   1990
           John L.
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Offline Alan Resinger

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Re: Removable Stab ...
« Reply #10 on: July 28, 2020, 06:56:56 AM »
John, FM , May 1991, was looking at it the other day.
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Tom Vieira

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Re: Removable Stab ...
« Reply #11 on: July 28, 2020, 08:58:03 AM »
there's always the Windy videos on youtube as well from CLGUY and Ptaylo
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Offline Steve Berry

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Re: Removable Stab ...
« Reply #12 on: July 28, 2020, 10:44:20 AM »
Quote from: T.J. Vieira on July 28, 2020, 08:58:03 AM
there's always the Windy videos on youtube as well from CLGUY and Ptaylo

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Offline Dennis Toth

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Re: Removable Stab ...
« Reply #13 on: July 28, 2020, 03:58:37 PM »
John,
I've done the Windy approach on a Magnum size ship and it works OK but for a 35 - 40 or smaller there is not enough area to give good support. For my Barnstormer take-a-part I came up with the stab bolt plate. This puts the blind nuts outside the fuse sides and gives very strong support for the thin stabs that are used on these ships. The plate and rear bolt are epoxied to the filler piece below the in the fuse.

Best,   DennisT
« Last Edit: July 29, 2020, 12:13:26 PM by Dennis Toth »
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Offline John Leidle

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Re: Removable Stab ...
« Reply #14 on: July 29, 2020, 08:17:08 AM »
Quote from: Alan Resinger on July 28, 2020, 06:56:56 AM
John, FM , May 1991, was looking at it the other day.
   I stand corrected , thanks Alan.
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Offline John Leidle

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Re: Removable Stab ...
« Reply #15 on: July 29, 2020, 08:19:31 AM »
  Thanks Dennis.
  John L.
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Offline John Leidle

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Re: Removable Stab ...
« Reply #16 on: July 29, 2020, 08:27:08 AM »
  Thanks Steve, didnt know the vido existed.
             John L.
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Offline Steve Helmick

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Re: Removable Stab ...
« Reply #17 on: July 30, 2020, 08:39:47 PM »
Is that Windy U's house? Jeez, the left end of the porch railing isn't straight at all! Wow! I'm shocked!  LL~ Steve
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Offline Dennis Toth

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Re: Removable Stab ...
« Reply #18 on: July 31, 2020, 05:53:26 AM »
I think that is a combination of camera angle and the porch angling out, kinda of a hex shape like the roof line.

Best,   DennisT
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