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Wing dihedral required.

Ben Buckle Elf

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Kevin Fairgrieve21/08/2016 15:34:03
1669 forum posts
2979 photos

I have been given a 95% complete Ben Buckle Elf.

Nowt wrong with that, and if I can find one I want to put a 48FS in it.

The builder (unknown) has built in far to much dihedral. Or so it looks to me.

Can any one help with the angle required and also the length of the cabane struts.

img_0060 (medium).jpg

img_0064 (medium).jpg

MattyB21/08/2016 15:43:34
2073 forum posts
32 photos

Doesn't look that much more to me compared to a few seen online...

Unless you are grossly offended by it's looks with the current dihedral I would just cover, fly and enjoy it - it is not like this is a machine you will be trimming to the n'th degree for optimum performance!

Edited By MattyB on 21/08/2016 15:45:46

Kevin Fairgrieve21/08/2016 16:40:59
1669 forum posts
2979 photos

Now I have seen that I feel better about the angles.

Just need to know the cabane strut lengths, and that would tie it all in nicely.


Former Member21/08/2016 18:12:12

[This posting has been removed]

GONZO21/08/2016 18:24:29
1371 forum posts
14 photos

Would a copy of the plan help **LINK**

bert baker21/08/2016 18:28:41
1609 forum posts
331 photos

I test flew one a year ago.

The struts were a pain, if you over speed the airframe and pull a bit to tight the wing lifts and they fall out.

Flew nice but don't over do the speed it can bite.

The strut length at a gues is set when the wings are securly in place, make the dowles that form the leading edge if I remember right, as long as possible.


I think the chap who owned it was going to fitt a dowle in the wing leading edge to stop it lifting.

Never seen him or the plane again.

Edited By bert baker on 21/08/2016 18:55:24

Edited By bert baker on 21/08/2016 18:55:50

Edited By bert baker on 21/08/2016 18:56:45

Kevin Fairgrieve21/08/2016 19:24:28
1669 forum posts
2979 photos
Posted by GONZO on 21/08/2016 18:24:29:

Would a copy of the plan help **LINK**

That`l do nicely sir.

I looked but could only find the original smaller plan.



Robert Foreman21/08/2016 20:05:35
71 forum posts
45 photos


Hold on, that link is to a plan which is not the Ben Buckle version, it is an updated version with ailerons and removal of free flight design points.

I have the real Ben Buckle plan and it shows 2.75" under each bottom wing tip and 3.25" under each top wing tip.



William Macleod20/05/2019 20:46:16
127 forum posts
66 photos

Who knows where the C lof G is please? Bill20181101_161755_resized.jpg

Kevin Fairgrieve05/06/2020 19:59:46
1669 forum posts
2979 photos

2016 really.

As I have been furloughed from work for the last 11 weeks, many projects have been progressed at an alarming rate.

The Elf hit the bench last week.





Just a couple of jobs outstanding.

Paint the cowl and undercart, fit a throttle servo, a little trim to break up the white and then go fly.

I am back to work Monday, but I am sure it will not be another 4 years before an update.

Dwain Dibley.05/06/2020 22:44:51
1504 forum posts
1487 photos

Very nice Kev, did she get the 48FS in the end ?


Kevin Fairgrieve06/06/2020 08:11:55
1669 forum posts
2979 photos
Posted by Dwain Dibley. on 05/06/2020 22:44:51:

Very nice Kev, did she get the 48FS in the end ?


A 48FS is just a bit to big to fit.

So I got a lovely little 40FS instead.

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