Fournier Rf4 mit retracts and spoilers

  • Grumpy42
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12 Oct 2011 07:21 #1 by Grumpy42
Fournier Rf4 mit retracts and spoilers was created by Grumpy42
G'day,

I'm currently starting out on the RCM&E free plan of the Fournier RF4. Of course, being an idiot and constantly making rods for my own back I've decided to incorporate a retractable nose wheel and spoilers in the wings as per the prototype. I've pretty much got the spoiler installation worked out but I'm still driving myself nuts with the nose wheel retract. I've had a look at the prototype and the nose wheel retracts forwards. I've also seen a couple of references to other modellers that have solved this installation and apparently there are some units available - but I don't know where. If any one has any clues I'd be most greatful. Alternatively I have a lathe so I can make up my own retracts if necessary. All I need now is some hero who has already been there and done that to offer me the working drawings to build my own. This poor colonial boy places his future in the hands of dear old Mother England. :dry: :whistle:

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12 Oct 2011 15:10 - 12 Oct 2011 15:11 #2 by blooper
Last edit: 12 Oct 2011 15:11 by blooper.

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12 Oct 2011 16:02 #3 by Eric
Nose wheel on a Fournier RF4?? Main gear, yes, nose wheel, no. The wheels are on outriggers on the wing, and the mono main is under the c of g. There IS no nose wheel!

if you are calm and collected when all about you are going berserk - you've missed something important!

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12 Oct 2011 18:03 - 12 Oct 2011 18:26 #4 by Grumpy42
Replied by Grumpy42 on topic Re: Fournier Rf4 mit retracts and spoilers
OK - but it looks like a bloody nose wheel to me and I'm pretty sure it's in front of the CG. Nose wheel - main gear what ever. I have over 20,000 hours up as a pilot (OK - I know that doesn't count) and to me it's a bloody nose wheel. I still can't work out how to incorporate it in the model though - the bloody fuel tank is in the way. I've also added a couple of photos of a local restoration - (full size) It seems to me the Nose/Main retracts forward so the weight of the gear would be forward of the CG when retracted. If it were mounted at the CG I think it would also compromise the main wing spar.

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Last edit: 12 Oct 2011 18:26 by Grumpy42. Reason: Buggered up some spelling + add photo

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12 Oct 2011 18:08 #5 by Grumpy42
Replied by Grumpy42 on topic Re: Fournier Rf4 mit retracts and spoilers
Thanks Blooper - just might do the trick - now all I have to do is figure out what to do with the fuel tank. The first person who says go el*ctr*c will be shot at dawn.! :)

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12 Oct 2011 18:21 #6 by blooper
Replied by blooper on topic Re: Fournier Rf4 mit retracts and spoilers
pulse jet then. :P

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12 Oct 2011 18:28 #7 by Grumpy42
Replied by Grumpy42 on topic Re: Fournier Rf4 mit retracts and spoilers
Now THERE'S a solution!! :) :) :)

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12 Oct 2011 18:37 #8 by blooper

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12 Oct 2011 18:46 #9 by Eric
Wing tanks!

if you are calm and collected when all about you are going berserk - you've missed something important!

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12 Oct 2011 21:05 #10 by The Beard
Replied by The Beard on topic Re: Fournier Rf4 mit retracts and spoilers
You could just buy an ARTF and save yourself the bother,( smartly ducks to the left)

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12 Oct 2011 21:21 #11 by Garry Pollard
Replied by Garry Pollard on topic Re: Fournier Rf4 mit retracts and spoilers
I would say, duck to the left, right and centre and he will still get you for that comment Stephen:) :) :) :) :) :) :)

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13 Oct 2011 02:19 #12 by Eric
Put the fuel in the cockpit - then the engine will run for about six hours non-stop! B)

if you are calm and collected when all about you are going berserk - you've missed something important!

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27 Oct 2011 19:20 - 27 Oct 2011 19:22 #13 by Grumpy42
Replied by Grumpy42 on topic Re: Fournier Rf4 mit retracts and spoilers
Well after driving myself nuts and looking at several glider retracts which don't quite fit I resorted to the drawing board and designed my own. Much lathe work and barking of fingers later I've come up with a solution - the only thing is said solution requires a custom made fuel tank - read wider than the normal 4 oz tank and with a channel in the bottom to allow the wheel to fully retract into the fuselage. The plumbing makes an interesting challenge. I've completed the fuselage up to the forward section and I've left the space open to install the tank and retract and as soon as I get that working properly I'll install the motor and finish the cowl and cheeks. In the meantime I'm steeling myself to sit down and cut out all those bloody ribs. Attached are a couple of photos of the progress up to now.


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Last edit: 27 Oct 2011 19:22 by Grumpy42. Reason: Wrong photo sequence

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27 Oct 2011 19:36 #14 by Ex-Member
Replied by Ex-Member on topic Re: Fournier Rf4 mit retracts and spoilers
wow :cheer:

me likes that.

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  • Klipkopwildlife
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27 Oct 2011 20:07 #15 by Klipkopwildlife
Replied by Klipkopwildlife on topic Re: Fournier Rf4 mit retracts and spoilers
Looking good Grumps, what motor are you putting in? I see a 4st laying on the plan there.

Do it now, you may never get another chance

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