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A New counter-rotating Prop by Sebastiano Silvestri

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A New counter-rotating Prop by Sebastiano Silvestri

Old 10-09-2007, 02:58 PM
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fonzie72
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Default A New counter-rotating Prop by Sebastiano Silvestri


A new Solution for next F3A World championship by Sebastiano Silvestri, everything at 0° everything neutral... maybe it is the future for electric F3A
[sm=lol.gif]
Ciao
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Old 10-09-2007, 03:47 PM
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Derek.Koopowitz
 
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Default RE: A New counter-rotating Prop by Sebastiano Silvestri

Just amazing what they can do with just one motor these days... absolutely amazing!

[8D]
Old 10-09-2007, 04:42 PM
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rcacro
 
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Default RE: A New counter-rotating Prop by Sebastiano Silvestri

Nothing really new. I seen one at the Nats fifty years ago!!

John
Old 10-09-2007, 07:47 PM
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Adamg-RCU
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Default RE: A New counter-rotating Prop by Sebastiano Silvestri

What brand name is printed on the props?
Old 10-09-2007, 08:41 PM
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BrunoCH
 
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Default RE: A New counter-rotating Prop by Sebastiano Silvestri


ORIGINAL: Adamg-RCU

What brand name is printed on the props?
E-Factor. [link=http://www.f3a-e-factor.de/]http://www.f3a-e-factor.de/[/link]
You can get some more info [link=http://www.znline.com/content.php?langue=english]here[/link], just scroll to the bottom of the page.
This is really cool. Too bad I´m not going to Argentina, I´d love to see it in person.
Old 11-27-2007, 11:25 AM
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Niall
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Default RE: A New counter-rotating Prop by Sebastiano Silvestri

So what did people think about it at the WC??
Old 11-28-2007, 05:44 AM
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ofremmi
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Default RE: A New counter-rotating Prop by Sebastiano Silvestri

He only used it in the finals, he told me that due to low flight speed he was not sure that he would be able to complete one P07 within the allowed 10min. The downwards braking was extreme, really slow speed going down. What I did not like was a high-pitched whine from the gearbox. The sound from the contra-rotating propellors was OK, but the gear-noise was not.
The other one using contra-rotating propellors, in an Seduction from OK models with a dual-motor setup was generating weird noises.
I think that the concept begind the gearbox (e-factor) is a very good one since it distributes equal torque to both propellors. It's still a new concept, and as usual one can expect improvements over time, so lets wait a couple of years and see :-)

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