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Free Flight Ray Malmstrom Skygipsy with AE 0.2cc

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Bustergrunt21/09/2016 14:43:37
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164 forum posts
33 photos

Fist tried with a Cox but changed to an AE engine, for that lovely diesel 'niff'SkygipsyCox engined

Edited By Bustergrunt on 21/09/2016 14:44:34

Bustergrunt21/09/2016 14:44:51
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164 forum posts
33 photos

Beauty and the Beast

Colin Leighfield21/09/2016 17:00:54
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6086 forum posts
2557 photos

That's a proper model aeroplane.

IanN21/09/2016 17:05:57
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1675 forum posts
119 photos
Posted by Colin Leighfield on 21/09/2016 17:00:54:

That's a proper model aeroplane.

+1 thumbs up

And diesel - a proper engine aswell !

Colin Leighfield21/09/2016 17:40:43
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6086 forum posts
2557 photos

I've got a number of small diesels, must use them one day.

Andy G.22/09/2016 07:48:23
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413 forum posts
215 photos

Nice! One of those was my first ever power model. Built a few of Ray's models since though.

Dave Cunnington24/11/2020 22:04:35
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243 forum posts
86 photos

Fast forward to November 2020. I have enlarged the plan to 54" span, and intend to go from free flight to rc 4 channel, an interesting project in lockdown.

Currently thinking of an old OS 25 FP to power it, but have OS 40 LA in the cupboard if required

img_6643.jpg

Edited By Dave Cunnington on 24/11/2020 22:05:07

Edited By Dave Cunnington on 24/11/2020 22:06:11

Colin Leighfield24/11/2020 22:21:42
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6086 forum posts
2557 photos

It’d probably fly on a Mills 1.3! That would be nice.

Matt Carlton24/11/2020 22:55:46
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261 forum posts
44 photos

Agree, a 25 would be more than enough, 54" is roughly J60 size and a lot less bulky. I reckon a .15 or even a .10 would work. Or, as Colin says, a Mills 1.3 or a PAW 09 or 15 maybe.

J D 825/11/2020 09:10:29
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1769 forum posts
88 photos

Like it.thumbs up " I love the smell of diesel in the morning " model plane stuff that is.

Dave Cunnington19/12/2020 12:05:54
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243 forum posts
86 photos

Slow progress, took a while to decide where to put everything and design

the inside structure. The battery location is fluid, dependant upon C of Gimg_6654.jpg

EarlyBird19/12/2020 12:28:38
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646 forum posts
460 photos

An interesting project Dave.

It looks like you are using lite ply, lack of balsa?

Design changes add to the fun IMHO and scaling up even more so. I have yet to advance to scaling up and plan building but it will happen.

Cheers beer

Steve

Dave Cunnington19/12/2020 19:20:06
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243 forum posts
86 photos

Steve, liteply front end and balsa rear for fuselage, see earlier pic.

Hopefully this will be stronger as it's a 2X model and it should help with C of G, note that some of the inside structure is balsa.

Piers Bowlan20/12/2020 05:28:37
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2351 forum posts
68 photos

A classic model Dave, a good idea to supersize it. yes I have Christian Moes electric Sky Gipsy twin plan from RCMW mag - too many models and not enough time!

Just a question. Is the extra balsa platform raising the tank position necessary, as from the photo the centre of the tank looks well above the carb spraybar? I may be wrong 1) because the photo is deceptive 2) I am not really an engine man 3) probably doesn't make any difference anyway! I only queried it because I was concerned that a high tank position might flood your inverted engine. Also your inverted engine installation could potentially make disconnecting the glow clip after engine starting a little tricky. Just a thought smile d

 

Edited By Piers Bowlan on 20/12/2020 05:55:54

Dave Cunnington20/12/2020 09:46:49
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243 forum posts
86 photos

Very good thoughts, Piers, thank you.

In my limited flying experience I have only ever used upright engines. This one is inverted, which looks better, and means the sticking up engine head is not the initial point of contact in a "whoops" arrival.

Yes, I am planning a remote connection for the glow stick.

Regarding tank level, the current "floor " for the tank looks right, but I can always remove it after a final assessment.

I am building everything internal onto this one fuselage side before adding the other.

Regards DC

Piers Bowlan20/12/2020 10:17:09
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2351 forum posts
68 photos

Another alternative Dave would be to mount the engine 'sidewinder style' which would might avoid damage to a sticking up cylinder head as well as obviating the need for a remote glow stick, but I expect you already considered that. It might also be an idea to drill a hole in the front ply former too before assembly, should the battery needs to go in the nose. Hope you don't mind me adding my 2p worth.

Yes, I am doing the same thing with my Spateman build and adding it all onto one fuselage side before adding the other as I won't be able to get my fingers in after!

Dave Cunnington20/12/2020 15:43:42
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243 forum posts
86 photos

Any 2p is gratefully accepted Piers !

Yes, sidewinder is an option but I preferred either up or down........whatever, it can be a late decision, and the sidewinder would lift the carb up a bit , and also give room for a bigger pilot.

Just for entertainment I've been playing with ideas. My son has a 3D printer and will provide me with a Dan Dare Pilot and a Mekon for the passenger compartment, so I wondered how it might look !

img_6656.jpg

Edited By Dave Cunnington on 20/12/2020 15:45:46

john stones 1 Moderator20/12/2020 17:48:08
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Moderator
11946 forum posts
1531 photos

Look nice at our open days that Dave, you keeping well ?

Dave Cunnington20/12/2020 20:27:45
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243 forum posts
86 photos

Cheers John. Yes staying home and staying safe, building stuff is keeping me sane.

Trouble is, no flying = no crashes and my shed is getting too full up.

Stay well yourself John, and say hello to Mark from me

Rgds DC

PatMc20/12/2020 22:15:33
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4526 forum posts
550 photos
Posted by Piers Bowlan on 20/12/2020 05:28:37:

I am not really an engine man 3) probably doesn't make any difference anyway! I only queried it because I was concerned that a high tank position might flood your inverted engine.

It may seem counter intuitive but an inverted 2 stroke is less likely to flood (or suffer hydraulic lock) than one mounted upright.

 

Edited By PatMc on 20/12/2020 22:17:22

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