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Andy Edmead Build Blog Sabre

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Harry Twist23/11/2019 22:31:18
347 forum posts
256 photos

Hi Andy, nice tidy work there, looking good already!

McG 696924/11/2019 08:56:09
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3013 forum posts
1139 photos

Absolutely, tidy work there, Andy.

If you made up your mind about servo wires choice already, it could be soon the right moment to integrate them?

Cheers

Chris

Andrew Edmead24/11/2019 23:07:06
42 forum posts
29 photos

Thanks chaps, I don’t think it’s that tidy. I’ve used a bit too

much glue. However it’s looking ok. I’ve started on the

the shear webs and I’ve glued the false leading edge.

Any tips on how to trim the false leading edge? To be honest

I'm not going to risk enlarging the holes for the servo plugs or any straws/tubes.

Im just going to run the wires through the holes.

Ive decided to virtually finish both wings before starting

the fuz. A few more pics below to show progress to follow.

 

 

 

Edited By Andrew Edmead on 24/11/2019 23:07:26

Mark Kettle 126/11/2019 05:13:45
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2506 forum posts
1508 photos

I keep tuning in and watching with interest Andy.

McG 696927/11/2019 10:03:05
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3013 forum posts
1139 photos
Posted by Andrew Edmead on 24/11/2019 23:07:06:

Any tips on how to trim the false leading edge?

Hi Andy,

Regarding your LE trimming/sanding, I just use the longest possible sanding tool I have. Mine is from Great Planes and is about 30cm long.

If you don't have one, just use any straight ali profile and glue some sand paper to it with double face tape (120 > 150 grid will do).

Cover your ribs with a stroke of masking tape just next to the LE. This will protect your ribs but also serve as a sanding guide. In fact, when the sandpaper starts to touch the surface of the tape, your job is done... yes

I saw your suggestion of a thread for 'gotchas' and Q & A for newbies but nobody seems to have reacted to it. Shame...

Hope this helps a bit

Cheers

Chris

Harry Twist27/11/2019 10:16:57
347 forum posts
256 photos

Good tips there Chris, here's another that may help for trimming false leading edges (and false trailing edges).

Take a steel ruler and sit it immediately behind the false le and sat on top of the ribs, with a scalpel cut through the part of the false le that sits above the ruler, then cut along the ruler with the blade flush and flat on the ruler surface. This leaves you with only the thickness of the ruler to plane down flush. Cut from in front of the wing. Staged photo shows what I mean ( wing in photo already trimmed).

Hope it is of some help!

 

img_20191124_233020641_hdr.jpg

Edited By Harry Twist on 27/11/2019 10:23:48

Andrew Edmead27/11/2019 21:26:36
42 forum posts
29 photos

Thanks Chris and Harry I used the steel rule and sanded the False leading edge.

I'm almost ready for the top wing skin, just need to add the balsa blocks.

However I'm not sure if I've done it correctly please could you check this pic.

Thanks

Andy

McG 696928/11/2019 19:10:51
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3013 forum posts
1139 photos

Hi Andy,

IMHO, that 'dark' piece of hardwood is supposed to be the 'joiner' between the 2 wing halves when you bring them together. And I think it's supposed to be ply. indecision

But that's just me. So, I suggest you to post your pic in the newly created 'Sabre Build gotchas' by Martin G and see what he has to comment about it... yes

Cheers

Chris

Martin Gay28/11/2019 22:35:44
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347 forum posts
245 photos

Hi Andy,

The original idea was for your hardwood piece to be a single length once the wings were joined.

As there are two wing dowels and two wing bolts you might get away with having it in two sections.

Andrew Edmead29/11/2019 09:03:53
42 forum posts
29 photos

Thanks Martin, Noob mistake by me, I will re-work that bit.

Does the wing joiner go in between the top and bottom wing skin, or does one trim the skin and make the joiner level with the sheeting? Hope that makes sense?

Thanks

Andy

Martin Gay29/11/2019 17:00:22
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347 forum posts
245 photos

Andy,

The ply plate is stuck to the front of the skins and the dowel blocks. We did this to the first two models after skinning and joining the wings.

Martin.

Andrew Edmead03/12/2019 22:58:10
42 forum posts
29 photos

Right wingThanks for the info Martin.

I have reworked my mistake, I read the plan wrong regarding the ply brace.

I have now got a skinned right wing! I just need to add the leading edge and wing tips.

I noticed a warp in my wing when I checked it but I weighted it down on the

Jig overnight and it was much better. It’s now staying on the jig!

I’ve just glued the main spar on the bottom skin for the left

wing. It’s very slow progress as I’m only managing a few hours a week.

Andrew Edmead06/02/2020 10:00:55
42 forum posts
29 photos

Hello, My progress has been slow and riddled with errors but I almost have a completed wing,

Could somebody share a picture of the completed wing tip and from the end of the wing as I'm unsure of the profile.

I'm starting on the Fuz soon.

Andy

McG 696906/02/2020 17:24:14
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3013 forum posts
1139 photos

Hi Andrew,

Please have a look at Phil C's blog.

He's having a lamination balsa/thin ply sandwiched in between, as most PSS builders do.

Great explanation and pictures showing the process there. yes

Hope it helps.

Cheers

Chris

Andrew Edmead06/02/2020 19:49:38
42 forum posts
29 photos

Thanks Mcg, I read His blog but the only photo he has is before sanding.

Andy

Andrew Edmead06/02/2020 20:32:43
42 forum posts
29 photos

Andrew Edmead06/02/2020 20:35:04
42 forum posts
29 photos

Andrew Edmead07/02/2020 22:39:30
42 forum posts
29 photos

My f8 former seems too small, the stringers are lined up perfectly on the plan but the former notches look too big and the ext edges of the former only just meet the edge of the stringers. What should I do?

Phil Cooke07/02/2020 22:57:40
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2441 forum posts
1687 photos

Hi Andy

I noticed the same on a couple of the formers - its easy enough to correct for.

I'd keep the top rear spine as a datum as this is straight, and bring the lower spine up just a touch along its entire length so that the former fits flush top and bottom. I found they just sat within the lines on the plan... it didnt need a big adjustment.

As the fuselage tapers to the rear in profile you can afford to move F8 rear a little too if that helps... it will soon meet the edge of the spine.

Andrew Edmead07/02/2020 23:51:48
42 forum posts
29 photos

Thanks Phil, that seemed to work.
Just need to make sure the other side is the same when I do it.

m

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