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Author Topic: Aerographics Sopwith Triplane  (Read 659 times)
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danmellor
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« on: December 19, 2020, 06:06:53 PM »

After a huge period of indecision and zero enthusiasm, I've got a bit fired up again and have finally picked a subject for Kit Scale. Assuming we ever get to compete again, I think this is a good bet! CO2 shown on the plan, so no problems there, masses of wing and drag to keep the speed down and an interesting build.

Wish me luck!

Dan.
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THB
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« Reply #1 on: December 19, 2020, 06:16:20 PM »

Great subject - always wanted one! Enjoy!
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Tim
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« Reply #2 on: December 19, 2020, 06:32:08 PM »

Dan, I look forward to this build. I have the Camel which has laser cut parts. Is this the case with the tripehound?
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Russ Lister
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« Reply #3 on: December 19, 2020, 06:59:29 PM »

Looking forward to this Dan  Smiley
I've got the plan and it is my favourite out of the approx. 5 plans I have for the Triplane.... but yet to attempt it!
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danmellor
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« Reply #4 on: December 19, 2020, 07:28:31 PM »

I'd forgotten that I'd got the VMC laser cut version. I don't think I'd have succumbed if I'd had to cut all those ribs and riblets...

Cheers,

Dan.
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PB_guy
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« Reply #5 on: December 19, 2020, 07:37:08 PM »

Dan, if you want some detail pics of the Tripehound, see here: http://freeflightarchive.com/index.php/our-staff/95-walk-around-aircraft-in-detail/432-sopwith-triplane I have the originals in greater resolution if you want any.
ian
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danmellor
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« Reply #6 on: December 19, 2020, 07:49:12 PM »

Thanks for the offer, I'll let you know!

Dan.
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vintagemike
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« Reply #7 on: December 20, 2020, 10:36:19 AM »

This is one I have the plan for, the amount of times I have looked at it, all those ribs and riblets, and put it away again!! good luck
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Squirrelnet
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« Reply #8 on: December 20, 2020, 11:57:42 AM »

Nice choice Dan , look forward to seeing this one come together
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danmellor
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« Reply #9 on: January 01, 2021, 11:34:14 AM »

Progress so far, just to prove I mean it this time and haven't just been in a drunken stupor for the entire Xmas break... I am quite pleased so far. There was some extensive jigging used to get everything lining up correctly and it has paid off. The plan shows built in downthrust, but no sidethrust. I have never built a CO2 model that didn't need the motor pointing to the right, so the mount for the GM300 was set up with about 4 degrees with the prop emerging centrally.

Back soon!

Dan.
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Squirrelnet
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« Reply #10 on: January 01, 2021, 12:25:16 PM »

Looking good Dan.

I'm interested by your choice of the GM300, it seems very powerful for a 22" even though it's a triplane. Is the idea to run it at reduced throttle to avoid icing inside ?
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danmellor
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« Reply #11 on: January 01, 2021, 05:28:15 PM »

The kit was designed around the GM300. Who am I to argue?!

Dan.
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DHnut
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« Reply #12 on: January 01, 2021, 09:19:21 PM »

Dan
I agree the GM120 is not man enough for this model even if built light. There is just too much drag. You might just get away with a G160 but it will be marginal. I look forward to progress and will look in when I get back from the Nationals that start tomorrow for 5 days. I will leave at 0400 for an 8 hour drive to Carterton just north of Wellington. Weather is predicted to clear.
Ricky
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Russ Lister
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« Reply #13 on: January 02, 2021, 11:31:42 AM »

I agree with Ricky, but we all know that Dan knows his CO2  Smiley

My 15.5 inch span DPC Triplane was very marginal with a Gm63
Andrew's VMC 18" Triplane seems bigger than the span suggests when I saw it flying at Peterborough ... seems about the max for a Gm120.

The Aerographics version is a relative whopper, so I can imagine it needing the extra power!
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danmellor
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« Reply #14 on: January 02, 2021, 11:59:23 AM »

It's nearly 9" high from wheel tread to top wing. That's a lot of frontal area to haul about!

Dan.
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danmellor
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« Reply #15 on: January 05, 2021, 04:43:25 PM »

Bit more done. Stood on her own legs, side formers on and plumbing mounted permanently. Legs are rigidly mounted, instead of the rearward sprung shown on the plan. Seemed a little overkill along with a sprung axle on a 22" model. The legs are just plugged into short lengths of tube, removable for finishing. The side stringers will be bass instead of balsa. If I don't change them I just know I'll stick my fingers through them at some point...

Cheers,

Dan.
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danmellor
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« Reply #16 on: January 10, 2021, 05:45:52 AM »

Got a bit further yesterday. Fuselage now just waiting for the upper decking and side sheeting adding before I have the cowl to deal with. I did use 1/32" bass for the side stringers and they have already proved their worth! The decking and side cheek pieces have been soaked and are drying to a curve taped onto empty Special Brew cans. I always said they'd come in handy...

Cheers,

Dan.
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danmellor
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« Reply #17 on: January 10, 2021, 01:53:13 PM »

Bit more done!
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danmellor
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« Reply #18 on: January 14, 2021, 12:52:55 PM »

Plodded along with the undercarriage today. Not the kit wheels as I've not made them up yet, but similar size. You can see why I think the GM300 makes sense. The prop driver is almost 5" off the floor! The 6" rule definitely gives it some scale...

Cheers,

Dan.
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Kevin M
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« Reply #19 on: January 14, 2021, 02:29:25 PM »

Looking very nice indeed.
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danmellor
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« Reply #20 on: January 14, 2021, 03:35:08 PM »

Thanks! I've got tomorrow off work, so I may manage to get the wings underway.

Cheers,

Dan.
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