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C17 Globemaster III - 1/15th Scale for PSS

CAD to slope - 133" span

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Monz11/01/2016 14:13:20
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545 forum posts
26 photos

Look forward to your build Andy! Nice to see so much PSS activity about yes

Andy Meade11/01/2016 14:15:07
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2610 forum posts
679 photos

Thanks Monz! I'd love to try one in depron at some point laugh

Phil Cooke11/01/2016 17:21:08
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2254 forum posts
1539 photos

Subscribed Andy - look forward to seeing you and Dave develop these heavies from your conceptual drawings to slope. I can't imagine how little spare room you have in your workshop starting this with all the other projects you have on the go - you are an inspiration to us all!!

David Gilder11/01/2016 17:36:00
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1854 forum posts
656 photos

Well I have tidied my workshop up the other day Phil in readiness.

12511139_10153462115563666_471414385_o.jpg

It currently has the AN72 on the desks which I hope to have nearly ready by the time the BGC parts arrive!!

Now as I understand things, Andy is doing a standard military grey for his colour scheme...

I on the other hand want to do something a little different (as always)... and so I will be looking to complete mine in the colour scheme adorned on A7-MAB!

apfqatarc17aapplgb.jpg

Hopefully this will also aid us in telling them apart in the air!!

Harry Twist11/01/2016 19:19:50
294 forum posts
204 photos

Andy, Great subject choice and the CAD images really make the project come alive - will follow with interest - subscribed.

Harry

Andy Meade12/01/2016 08:53:17
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2610 forum posts
679 photos

Thanks Harry - I hope it all goes together as nicely as it does in the CAD!

That's going to be some "interesting" decal work for you there Dave...

Phil - thanks smiley The B24 has been moved to storage in order for me to get this done. Loads of room on the bench for it..

20160112_063400.jpg

laugh

Flyer12/01/2016 09:20:35
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535 forum posts
81 photos
Posted by Andy Meade on 12/01/2016 08:53:17:

Thanks Harry - I hope it all goes together as nicely as it does in the CAD!

That's going to be some "interesting" decal work for you there Dave...

Phil - thanks smiley The B24 has been moved to storage in order for me to get this done. Loads of room on the bench for it..

20160112_063400.jpg

laugh

Now I feel so much better seeing this. I have hope. surprise So it is true, I have a workshop to challenge the best (shame my building skill's arn't there yet tho... crying 2 

Andy Meade12/01/2016 09:22:01
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2610 forum posts
679 photos

devil I use the garage for the big stuff though, hehe. The A10 was (infamously) built on an ironing board, so anything is possible.

Phil Cooke12/01/2016 10:47:51
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2254 forum posts
1539 photos

other than pressing your shirts... nerd

Andy Meade12/01/2016 10:54:02
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2610 forum posts
679 photos

..and that's probably why I look like a tramp in a tie at work! cool

_AL_13/01/2016 12:08:59
20 forum posts
8 photos

Interesting subject. I'm looking forward to watching the build.

Al

Mark Kettle 113/01/2016 14:31:24
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2367 forum posts
1382 photos

smiley LoL.

Steve Houghton 113/01/2016 15:18:33
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1888 forum posts
128 photos

I have a piece of plaster board on my dining table to work on, so Michelle isn't allowed over to my place for dinner when I'm building wink. I have one foamy build on the go now, a complex (for me) balsa repair next on a F5J thermal soarer, then the A4 project. It could be mid summer before I have to cook for her again! Lol.

Looking forward with great interest to see these two birds come together thumbs up

Andy Meade15/01/2016 15:41:37
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2610 forum posts
679 photos

Cheers Steve

I have had some concerns over the operation and construction of the flap canoes. I sketched up a few ideas, and this is what I've ended up with. The flaps operate in much the same way as the full-size, with a hinge at the bottom of the canoes - for me this will be an arrangement of 3mm glassfibre board bonded to a central core of 3mm liteply. The hinge itself will hopefully be a 4mm ball-link with a 4mm carbon pin, and a clevis on the mating part will be glassfibre board.

canoe on wing flap test.jpg

Shown here in the model are canoes 1 and 4 (4 being most outboard), and the flap is deployed. Canoe 3 will be identical to these, but canoe 2 will be where the "magic" happens. There will be two core plates on number 2, with a 6mm gap in between them. This will allow a linkage from a servo to pass through and link up with the rear part of the canoe, close to the pivot, which will give me the required large throw.

 

 

All canoe cores will be sandwiched in blue or pink XPS foam, then glassed. Flap servo access will be in the top surface, just in front of the spoilers.

 

 

I have also done some work on the fold-out parts of the landing lights, just for Dave!

 

landing light deployed.jpg

This will no doubt be a 3D printed part onto / behind which the LED will be mounted, and actuated "out" with a mini servo.

Here's the full size item :

c-17a_96-0006_18796.jpg

Oh, and most of my full size pics come from a great walkaround here.

Edited By Andy Meade on 15/01/2016 15:42:57

David Gilder15/01/2016 15:59:40
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1854 forum posts
656 photos

Fantastic work Andy.

I think you need to come and teach me how to do CAD!

Flap and canoe design sounds spot on, as does the fold out landing light. Please tell me your going to have these as fold outs on yours also!! You know it makes sense!!

Not heard anything from 99 yet !

Going to have to build a bigger bow next for he hot wire work!!

Dave

Andy Meade15/01/2016 16:28:10
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2610 forum posts
679 photos
Dave - I think I will go for it. Lights will be two either side of the nose, two in the undercarriage sponsons, and two on the wingtips.

There's also some loading lights in the underside of the tailplane if you wanted - but shouldn't really be on in flight so might be a waste.

I'm now contemplating nose weight and battery access. A servo halfway down the fus for the landing lights doesn't help matters, so she may have a large hatch around the crew access door for access. Well, I will - up to you how you skin that cat!

Edited By Andy Meade on 15/01/2016 16:29:22

Peter Garsden16/01/2016 08:52:43
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1573 forum posts
1159 photos
Looks great
Andy Meade22/01/2016 12:08:30
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2610 forum posts
679 photos

Thanks Pete!

Well, here are some images of the 2nd flap canoe, which as you can (hopefully) see, has space in the middle for the flap actuation rod.

flap & spoiler test.jpg

I have also added a basic shape for the top surface spoiler. I think I should be able to reverse this one into a parking spot with that much brake.

flap & spoiler test 2.jpg

That looks like...a lot from the front!

And all stowed :

flap & spoiler test 3.jpg

I shall model up canoe #3, then that'll be it for CAD modelling, and on with proper modelling this weekend. I have some Sea Hawk wings to cut, then its on with the fin for the C17.

Andy Meade15/02/2016 09:25:47
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2610 forum posts
679 photos

Start the clock! So the aim is to get this done for the Lleyn meet, or the September Orme meet - so it can beat up those pesky little (ugly) A4's on the slope.

Wood has been marked up and cut out. Spaniel included for scale!

20160213_142211.jpg

Matt Jones15/02/2016 09:27:13
1186 forum posts
1 photos
That spaniel will never fly with a section like that!

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