REFLECTOR: Running without prop

[Alex Balic]

The magneto structure/flywheel is sufficient to run the small engines- it is
enough flywheel for a single cylinder- and it is a little heavier than you
think- it is not straight aluminum- it has iron magnets molded into it.





-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Monday, April 27, 2009 4:33 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Running without prop

Actually the tow motor I use for a 210 uses a lawn motor engine, no
blade, just a 4 inch diameter aluminum pulley, very little mass
whatsoever. runs great..

Darrell & Nora Kufalk wrote:
> This will convince you.
> Take the blade off your lawnmower and see if you can get it to run.
>
>
>
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Scott Derrick
> Sent: Sunday, April 26, 2009 6:08 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Running without prop
>
> I've heard the flywheel reason before.  I thought the flywheel on my
> io360 was fairly beefy but that didn't seem to make any difference.
>
> I'm still unconvinced.
>
> Scott
>
> Keith Hallsten wrote:
>   
>> Or, to be more precise, the prop is a significant portion of the flywheel
>> system that the engine needs to run properly.  The ring gear provides
only
>>     
> a
>   
>> portion of the flywheel effect necessary (and it's often held onto the
>> crankshaft by the same bolts that would also hold the prop on).  Thus,
>>     
> some
>   
>> additional flywheel needs to bolted on.
>>
>> If you don't have a prop, you may be able to substitute a stand-in like a
>> piece of lumber.  However, you need to be absolutely sure that it's
sound,
>> balanced, and properly attached.  A piece of lumber coming off a running
>> engine would be a lethal missile!
>>
>> Keith Hallsten
>>
>>
>> -----Original Message-----
>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>> Behalf Of Laurence Coen
>> Sent: Sunday, April 26, 2009 10:05 AM
>> To: Velocity Aircraft Owners and Builders list
>> Subject: Re: REFLECTOR: Running without prop
>>
>> Scott,
>>
>> I think the difference is that auto engines come with a flywheel and an 
>> aircraft engine prop is the flywheel.
>>
>> Larry Coen
>> N136LC
>>
>> --------------------------------------------------
>> From: "Scott Derrick" <scott at tnstaafl.net>
>> Sent: Sunday, April 26, 2009 8:45 AM
>> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>> Subject: REFLECTOR: Running without prop
>>
>>   
>>     
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