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Marutaka Ju87B

Stevo finally gets on the case

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Stevo05/08/2017 16:30:37
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Suprisingly easier than I thought. Used the Credit Card method!

2017-08-05 16.22.01.jpg

 

I'll fully cloth the wing, and maybe attend to the servos and linkages.  That will be it for the wing for the time being, then on to the tail and the fuselage.  Oh and there's the Oleos to make, too...

Edited By Stevo on 05/08/2017 16:34:44

Stevo05/08/2017 16:37:53
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Steve's hint of the day : When wet sanding any wood finish, DON'T use water. If you go through the finish into the timber, the wood soaks into the wood and it swells up, and you risk cracking. So, what do you use? 'Panel Wipe'. Simples. A 5L can is around £8, lasts for ages, bear in mind it does evaporate quickly. It's a Napthalene based product, and isn't too lethal.

kevin b05/08/2017 17:15:37
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And you will need lots of ventilation.

Using it in the kitchen is NOT a good idea.

Might be an idea to wear plastic / rubber gloves as well.

Edited By kevin b on 05/08/2017 17:18:54

Ian Moody05/08/2017 17:15:48
33 forum posts
10 photos

Lovely job so far Steve. What are you going to do about the engine cowling and canopy? Is there some where you can source them or are you going to make your own?

Cheers Ian

dave parnham05/08/2017 17:35:33
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ooh I wanna see him make his own devil

Grand job as always sir!

you've re vitalised my interest after a long lay off, no flying or modelling since April, but I'm back in the mood now thanks to you and Dibleys 110 build.

cheers, watching with interest.

Stevo05/08/2017 17:44:33
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Well it's all been done in 3D CAD and I'm awaiting the 3D printout. It should bolt straight on.

I wish.

Oh Dave you like to see me suffer....

As the design is 8% larger than original, no standard parts are ever going to fit. Danny Fenton has offered to vac form the canopy, although he doesn't know it yet. kiss

So yes, all scratch built Dave and Ian. disgust

Kevin - the resin I used was totally odourless (stuff from Easy Composites). It was done in the garage with all the windows and doors open as well. And yes agreed for the Panel wipe, but it's not too pongy !  I used it to flatten 10 coats of Cellulose on a Telecaster, down to 2000 grit. I'd never use water again.

Edited By Stevo on 05/08/2017 17:45:42

Stevo06/08/2017 14:34:54
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2676 forum posts
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Oleo time! I just love tose biscuits, particuarly the mint ones.

Got two HK style ones that matched the drawings. I needed to fit a U shaped yoke to take into account the 90mm wheels, 32mm wide. Believe me I looked, when I found them they were mighty expensive. I took out the inner struts, and machine new ones of identical dimensions from bright mild steel (Original on top): -

2017-08-06 14.07.23.jpg

Why? As I need to braze the U yoke to them - cant do that on Aluminium

Drilled for a 3mm tap size...

2017-08-06 13.59.23.jpg

And hey presto.

2017-08-06 14.20.18.jpg

Just need to bend the yoke, and braze to the inner strut. Stay tuned, Stuka fans.

Dwain Dibley.06/08/2017 17:41:47
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773 forum posts
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Showing your age Stevo, repeatin yerself like that......surprisecheeky

Nice legs tho !!

D.D.

Edited By Dwain Dibley. on 06/08/2017 17:42:29

kevin b06/08/2017 18:43:17
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1452 forum posts
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Never seen a 6 wheel Stuka before ! devil

Stevo06/08/2017 19:06:35
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2676 forum posts
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What on earth??

ADMIN... please delete!!! (not the first time it's happened..)

Stevo07/08/2017 17:18:02
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2676 forum posts
745 photos

More Oleos..

1.5mm steel yokes, brazed to the Oleo inners I made earlier, and given a spritz of Hammerite

2017-08-07 17.13.11.jpg

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Stevo12/08/2017 15:43:23
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2676 forum posts
745 photos

Thanks to Lindsay Todd's efforts on the Blackhorse Stuka, I can follow suit

2017-08-12 14.10.46.jpg

Don't forget there's beech bearers under each leg.

20170812_152703.jpg

Machined up some bushes, soldered in to take a 4mm bolt from the UC braces. What looks like a collet on the rear leg stops driving the wire into the rear bearer on heavy landings.

 

Edited By Stevo on 12/08/2017 15:47:39

Stevo12/08/2017 18:41:46
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2676 forum posts
745 photos

Mounting bracets made, I've just used some small screws just to hold it in place to test the theory. The brackets are also soldered together as well as screwed into the beech.

2017-08-12 17.18.05.jpg

2017-08-12 17.18.13.jpg

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... and to prove this is live as it were .. that cat jumped up during photography..

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Biggles' Elder Brother - Moderator12/08/2017 22:36:35
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Moderator
14720 forum posts
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Repeated posts deleted.

Very nice work Steve!

BEB

Bucksboy13/08/2017 05:21:18
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500 forum posts
100 photos

I've seen this arrangement before but I'm still a little confused. The oleo is hinged where it's fixed to the wing/brackets. Am I right in assuming that as the plane lands the wheel is forced back and then the tyre hits the bent wire and this stops wheel going backwards? I appreciate that it's still not finished but we're always learning new things and this arrangement is slightly different so I'm trying to understand how it works.

Stevo13/08/2017 10:09:51
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2676 forum posts
745 photos

If that were the case, the wheel would be forced back into the piano wire and would jam against it and stop rotating; as they are now jammed, the aircraft would tip over crying

I've yet to add the braces that go between the wheel axle and the wire braces themselves, which then allows for movement up and down via the oleo, and limited movement back and forth as sprung against the piano wire. wink

Stevo13/08/2017 13:10:12
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2676 forum posts
745 photos

Bucksboy - these should explain it further ! Just for reference, the Oleo bracket is screwed onto the front beech bearer, whichruns up the central anhedral part.  The rear of the piano wire brace goes into another beech bearer in the wing-that's what that 12mm steel collet presses against. All the bearers are epoxied in and ply reinforced (see previous photos)

2017-08-13 12.55.18.jpg

 

2017-08-13 12.55.45.jpg

 

 

Edited By Stevo on 13/08/2017 13:14:13

Bucksboy13/08/2017 13:30:51
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500 forum posts
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Ah, that makes perfect sense now, the extra bracket makes all the difference. Thanks for the explanation.

Dwain Dibley.13/08/2017 23:09:48
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773 forum posts
750 photos

Very nicely done Stevo, I have the same set up on my Black Horse Gilmore, but I just assembled mine...blush, as it came out of a packet.......wink

D.D.

Stevo25/08/2017 21:18:08
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2676 forum posts
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Here we go Stuka fans... Horizontal stab time...

2017-08-25 19.00.40.jpg

All cut by hand wink

Bals blocks on TE are for the Robart hinges, the other two blocks are for the struts.

Now clamped up with top sheeting!

2017-08-25 19.11.39.jpg

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