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S1581 Hawker Nimrod MkI

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Tony Bennett09/11/2018 13:03:53
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4990 forum posts
129 photos

nicely done.

i am going to carve my nose out of layers of 10mm depron.

Tony B

Danny Fenton09/11/2018 17:51:50
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8857 forum posts
3707 photos

Whatever floats your boat Tony

Looking at the Westburg drawings, and some good profile pics, the top cowling curves from about the third exhaust stub.

I have been bandsawing blocks of blue foam, though balsa would also work, just more expensive!

fury147.jpg

Not looking forward to trying to find a Fury inside, but its there somewhere just have to tease it out....

Cheers

Danny

McG 696909/11/2018 18:08:58
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2385 forum posts
975 photos

I have no doubts at all, Danny.

If there is a Fury somewhere 'inside', you'll find it, no probs... wink

Cheers

Chris

Danny Fenton13/11/2018 23:22:58
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8857 forum posts
3707 photos

I am really struggling to find the cowl within. First attempt abandoned. Just about to start attempt two..... this should not be so difficult

Cheers

Danny

Colin Leighfield13/11/2018 23:36:06
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5600 forum posts
2286 photos

Persevere, success is guaranteed.

Martian14/11/2018 12:38:50
2040 forum posts
986 photos

Seek and ye shall find dan san master the answer lies within

Danny Fenton14/11/2018 22:16:37
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8857 forum posts
3707 photos

this blessed cowl area is driving me nuts....

I have made up a ring the same size as the spinner back plate, and used this to check the fit of the cowl, and it seems pretty good.

Though the cowl does highlight that the fuselage formers are still not right....

fury153.jpg

I then made a 1/4" thick lite ply former that fit snugly inside the cowl. The ring was glued to the cowl using Stabillit Express which is a polyester based adhesive. I find epoxy and polyester do not give a good bond.

fury150.jpg

The ring gives a much greater surface area to attach the cowl to the fuselage. Remember with mine I have no need to remove the lower cowl so it can be fixed permanently.

fury151.jpg

The cowl was then glued to the fus, using some temporary guides on the sides, and the spinner back plate to ensure all was aligned correctly.

fury152.jpg

Now I am in a quandry, I can just glass all this (keeping the upper hatch removable. Or I could finish the entire cowl section forward of the centre section and make a female mold to make a new much longer cowl.

fury155.jpeg

decisions decisions.....

Danny Fenton19/11/2018 20:43:11
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8857 forum posts
3707 photos

enough faffing about with the fuselage, I have decided to crack on with the wings while I ponder further.

The beauty of having the drawings in a cad format meant I could re-print them. Using the tile printing function within TurboCad allowed the lower wing panel to be printed in two sheets of A3 then joined. I then mirrored the drawing and printed again.

fury wing mirrored.jpg

So I now have a copy of the port and starboard lower wing, to build over.

fury155.jpg

So now I can start a lower wing

Cheers

Danny

Edited By Danny Fenton on 19/11/2018 20:44:17

McG 696919/11/2018 22:00:04
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2385 forum posts
975 photos

Hi Danny,

I guess the benefit of The Masters is just to have the skills to handle CAD software together with A3 standard or mirror printing.

The majority of common mortal pupils - especially Continental ones - just started drooling now, I guess. frown

Regarding your fuselage cowl, I would choose fore a 'total' mould back to the front cabane struts, even a bit further so you can cut the glass following the tilted lateral panel line.

A two piece mould - with a split line at the horizontal bottom of your hatch - would make it possible to adapt the slight former's discrepancies all the way back.

You were very conservative/silent regarding board erasers till now, this might change now... blush

Cheers

Chris

Danny Fenton19/11/2018 22:27:43
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8857 forum posts
3707 photos

Hi Chris, no board erasers

There is a part of me that wants to do exactly that. But it is a wheelbarrow full of work.

Hence moving to another part of the build while I muse...…….

Cheers
Danny

Danny Fenton21/11/2018 12:52:54
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8857 forum posts
3707 photos

Well I am very pleased with the fit of the lasercut parts. The wing is a joy to assemble

Andy has already made the jigging fairly simple, and 1/8 wedges under the spars, and a length of 1/4 x 1/2 under the trailing edge is as close as we need. A 1/4 wedge under the tips also keeps things true.

fury158.jpg

I did glue together the centre section ply first, as Jose Louis has, I however used aliphatic wood glue as opposed to epoxy. It becomes clear immediately that you need the outer panel first. The ribs set the distance between the spars, you use this distance for the centre section. So best to build the wings first.

I started laying out two spars on 1/8 wedges, then the ribs were added (no glue at this time) the trailing edge packing piece of 1/4 x 1/2 was covered in tape so that is doesn't inadvertanytly get glued to the trailing edge!

fury157.jpg

The trailing edge was cut from hard 1/16 and glued to the ribs. I then added the upper spars, marking where the chamferes go and sanding those in before replacing the ribs. I used a length of hardwood to just make sure the front all kept nice and square. I shaped the spar extensions and sanded them so that rib 3 fitted. then glued all the ribs to the spars.

fury156.jpg

more later

Cheers

Danny

Danny Fenton21/11/2018 16:33:15
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8857 forum posts
3707 photos

So next to add is the wingtip, the spar extensions will need relieving slightly so that it fits properly, as will the underside of rib 3, but otherwise it fit perfectly for me.

fury159.jpg

I then added the false leading edge.

fury160.jpg

More later

Cheers

Danny

Danny Fenton22/11/2018 10:02:03
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8857 forum posts
3707 photos

Okay had another look at the wing tips and the 2ns rib is not alligned correctly. I think others have chopped the rib open so that it can be slid over the spar extensions "after the tip is added is a better idea. I will start the starboard wing today and pay better attention to the tip and three outboard ribs. If you are at this stage you might want to wait until I have it figured out......

fury161.jpg

The fix seems fairly simple, sand the rib to match the flow of the wing, and perhaps double up the capping strips above.

fury162.jpg

I do need to check where the ply wing tip meets the leading edge, at the moment it is spaced 1/4 off the board, it may need to be higher at the leading edge.

Cheers

Danny

Danny Fenton22/11/2018 13:14:48
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8857 forum posts
3707 photos

Okay the sbd wing has gone much easier having sorted things out on the port one.

As for the rib 3 issue. If you fit the spar extensions and notch the ends with a 1/16 file, the wing tip then fits in fairly easily. 1/4 packing looks about right at the leading edge.

Take rib 3 and remove the three sections at the bottom, one under the spars, and another under the leading edge.

The rib will then drop into place much easier. It needs to touch the TE sheet and the ply wingtip at the front.

fury163.jpg

fury164.jpg

Hope this helps

Cheers

Danny

Danny Fenton23/11/2018 10:10:46
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8857 forum posts
3707 photos

Not sure if you have spotted but the ply doublers are cut with the grain in the wrong direction. And one pair are missing. So I cut two new doublers, using the laser ones as patterns.

fury166.jpg

Cheers

Danny

Jose L. G.23/11/2018 16:58:24
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175 forum posts
133 photos

Hi Danny. My ply brace has the grain in the correct direction. Also have to make a second one of each.

Cheers.

José Luis.

Martyn K23/11/2018 17:14:15
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4766 forum posts
3436 photos
My braces were correct as well Danny
Just looking at your spar extension. When you cover the tip, the soar extension will be visible. To get the right profile you will also need to sand the top profile quite a lot. My extensions are hidden and finish at the inner edge of the tip. I think the underside treblers should really be 1/16 balsa but it's no big deal sanding them down. I suspect there may be 20 variants of Doing these tips 😂

Edited By Martyn K on 23/11/2018 17:14:50

Danny Fenton23/11/2018 17:46:29
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8857 forum posts
3707 photos

Okay great Thanks for the feedback José Luis.

Thanks Martyn the wings have not been sanded down yet, nor have the capping strips been added. A pet hate of mine is spars (and any structure) showing through the covering to the surface, so don't worry that will not be happening.

Cheers

Danny

Martian23/11/2018 20:54:13
2040 forum posts
986 photos

Hi Danny I dont know whether you tracked down a source for carbon fibre tape , I got mine from here for a different project

Danny Fenton23/11/2018 21:43:04
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8857 forum posts
3707 photos

Thanks Martian, I will get some, and experiment

Cheers

Danny

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