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Information!?: Boomerang Earl Thompson USA (Helicopter)

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Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  MauricioB on Mon Apr 11, 2016 12:55 pm

Hello, someone knows this model ?, surfing the internet I came across this plane.
Someone did? or has it? some information?
Interestingly, thanks, greetings, Mauricio.-

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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  getback on Tue Apr 12, 2016 6:51 am

I couldn't find anything other than the site you got this from , it is a wild looking Heilie are you going to build one ? There is a lot of outer planes on the site mainly FF but nice older style . http://aeromodelismovolarlibremente.blogspot.com/2009/10/boomerang-de-earl-thompson-usa.html
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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  OVERLORD on Tue Apr 12, 2016 11:48 am

Mauricio, The plan was published in the Aeromodeller Anual 1974-75. You can find a copy of this book in the RCLibrary section of Outerzone:

http://www.rclibrary.co.uk/download_title.asp?ID=1127

The plan can be found in the second part. There is only the plan. I couldn't find an article or text referring to the model.

I think this helicopter is a nice model and orth building because the engine is part of the helicopter fuselage and doesn't sit on top of the rotor as in many similar models.

Lieven
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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  TDbandit on Tue Apr 12, 2016 1:35 pm

OVERLORD wrote:Mauricio, The plan was published in the Aeromodeller Anual 1974-75. You can find a copy of this book in the RCLibrary section of Outerzone:

http://www.rclibrary.co.uk/download_title.asp?ID=1127

The plan can be found in the second part. There is only the plan. I couldn't find an article or text referring to the model.

I think this helicopter is a nice model and orth building because the engine is part of the helicopter fuselage and doesn't sit on top of the rotor as in many similar models.

Lieven
Interesting, since you mentioned helicopters that have the engine on the mast on top a particular model came to my mind which I have messed with before, The dubro Whirlybird 505 an actual Rc heli with a top mounted engine that accualy flew. heres a youtube of one Not My Video btw (Bandit)



https://www.youtube.com/watch?v=Gb2Cj3epamA
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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  MauricioB on Wed Apr 13, 2016 12:19 am

Thank you all for giving information.
Very interesting finding Mr. Lieven. The project is interesting, it is very possible that at some point decide to print the map and maybe build it!
Thanks greetings, Mauricio.-
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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  MauricioB on Wed Apr 13, 2016 12:21 am

TDbandit wrote:
OVERLORD wrote:Mauricio, The plan was published in the Aeromodeller Anual 1974-75. You can find a copy of this book in the RCLibrary section of Outerzone:

http://www.rclibrary.co.uk/download_title.asp?ID=1127

The plan can be found in the second part. There is only the plan. I couldn't find an article or text referring to the model.

I think this helicopter is a nice model and orth building because the engine is part of the helicopter fuselage and doesn't sit on top of the rotor as in many similar models.

Lieven
Interesting, since you mentioned helicopters that have the engine on the mast on top a particular model came to my mind which I have messed with before, The dubro Whirlybird 505 an actual Rc heli with a top mounted engine that accualy flew. heres a youtube of one Not My Video btw (Bandit)



https://www.youtube.com/watch?v=Gb2Cj3epamA

Very interesting !, that the helicopter demists well, thanks for sharing the video !.
The engine has a very reliable !, essential! March .... greetings, Mauricio.-
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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  getback on Wed Apr 13, 2016 7:32 am

Now that's something , engine turning (how does it get the fuel supply ??) like the way it fired right up easy start!! surprised it stays together with the vibe ration lol! But COOL in its own way ! Eric Very Happy
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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  TDbandit on Wed Apr 13, 2016 11:51 am

getback wrote:Now that's something , engine turning (how does it get the fuel supply ??) like the way it fired right up easy start!! surprised it stays together with the vibe ration lol! But COOL in its own way ! Eric Very Happy
Yup it is a strange bird lol.
As far as how it gets fuel? There is a 4.5oz round metal tank below the engine that has a pickup put to the side very similar to our beloved baby bee. as the unit rotates, the fuel in the tank is sloshed to the sides through centrifugal force where it is picked up by the engine. There is a counter balance on the opposite side of the engine (at least there was on the example that i helped with) to help with the shaking but it didn't eliminate the shake completely. This helicopter works almost identically to the Cox Free flight helicopters only difference is the 505 is R/C assist and the cox is not, in fact I wonder if Cox got the idea from dubro or dubro got the idea from cox don't know.
This helicopter is very limited in control. About all it can do is move around, do piros and hover and for safety the fuel supply was very limited.
(Bandit)
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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

Post  NEW222 on Wed Apr 13, 2016 4:31 pm

That is definately one neat whirlybird.
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Re: Information!?: Boomerang Earl Thompson USA (Helicopter)

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