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NoblARF #3
Topic Started: Thursday Jul 28 2011, 09:11 AM (1,996 Views)
Garf
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The Profile Noblarf is flying. Noblarf #2 is flying. It is time to begin NoblARF #3. This one will get a Fox 35 stunt built with a 60th anniversary case, and a plasma P&C from Tony Cincotta.
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anghweebeng
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Plasma p/c Fox 35!! I can't wait to see the out come on your Noblarf #3. :wub:
Please keep us updated.

H B Ang.
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Garf
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This P&C is not by Fox. It is aftermarket by Tony Cincotta from Australia.
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anghweebeng
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Now I really can't wait! :blink:

H B Ang.
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Garf
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At the rate I build in summer, it will be about 2 months to completion.

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Edited by Garf, Tuesday Aug 2 2011, 03:34 AM.
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anghweebeng
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Hi Garth,
My guesstimate completion for the LA Warmth would be around 2 months too.
Question, what is the difference between the p/l from Tony and Fox?
I have a OS 40 H,and am thinking of powering it on a Brodak Magician, what your advice? Or maybe a Merco 35?
Thanks.

H B Ang.
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Garf
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As long as the OS 40H has a good ring, you can't get a much better engine. Be careful, they made 3 versions of the engine. The "P" version was a pylon racing version. Stay away from that one.
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Garf
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anghweebeng
Wednesday Aug 3 2011, 09:20 AM
Hi Garth,
My guesstimate completion for the LA Warmth would be around 2 months too.
Question, what is the difference between the p/l from Tony and Fox?
I have a OS 40 H,and am thinking of powering it on a Brodak Magician, what your advice? Or maybe a Merco 35?
Thanks.

H B Ang.
The Cincotta version had a heavy walled cylinder so was a 32 or 33 instead of a 35.
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anghweebeng
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Thanks, Garth for your replies.
I think the 40H is not the p version. Has twin bearings and ringed piston. Flat cylinder head.

H B Ang.
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Garf
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This is the preferred version.

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Edited by Garf, Thursday Aug 4 2011, 12:03 PM.
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anghweebeng
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Hi Garf.

Yes, same model, mine has delrin venturi and Super Tigre nva.
Thanks, happy to have the correct one. :D :wub:

H B Ang.
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Garf
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Use 5% nitro/20%castor with 2% klotz added for detergent value.
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anghweebeng
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Thanks Garf, I always use 22% - 23% oil, usually, 50-50 mix. I also realise that 40H is ringed, so more castor.

H B Ang.
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anghweebeng
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Ran in the OS40H and ASP 15A converted to c/l today.
It seems that the 40H can do 4-2 run. After 1/2 hour run, I tilted the test stand nose up and the engine went to 2 cycle. Held it for 20 seconds and back to horizontal for 30 seconds at 4 cycle to cool. Repeated that several times. Each run is about 2 minutes with cooling period of about 3 - 4 minutes, ie cool to touch with finger without backing off. Hope when mounted on model, with 'g' force, it would run 4-2, without runaway. Last run at full speed for 4 minutes with BYO 10x6 prop, no problem. ^_^

ASP 15A ABC engine on 7x4 prop, ran very rich for about 20 seconds to clear any rough spots as per normal procedure, then to almost peak at wet 2 run. 2 minute per run with 10-15 seconds peak by squeezing the fuel line. Ran peak at 5th run. Sounds promising for this level engine.

Both engines are easy to start. :wub:

I intend to mount the 40H on an ARF Oriental, looks like I have to shorten the nose by about 1/2". Did a taped up trial for balance, had to put 50 gms tail weight! :o

Now back to work bench for the L A Warmth.

H B Ang.
Edited by anghweebeng, Monday Aug 15 2011, 06:26 PM.
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Garf
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The H40 is well known for the ability to do the 4-2-4 break. Be aware the rear bearing is very rare. Boca Bearings has them, but I wouldn't bet on them having them for much longer. If you plan on putting a lot of mileage on the engine, I would order a spare now.
Edited by Garf, Thursday Aug 11 2011, 03:58 AM.
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