[NSRCA-discussion] OS-120 tank and prop size

[J N Hiller]

Jason, A 16-10 APC weighs 3.7 oz. I started running a Master Airscrew
'Scimitar' series last summer which weighs 1.75 oz. I know it is heresy to
even speak of a wood prop but it actually runs pretty well having a slightly
lower top RPM but the mid range pulls well. They have nearly identical blade
profiles but the wood is a little thicker. I thought the reduced gyroscopic
effect would be beneficial on smaller lighter airplanes (mine is 8.5 lb).
When selecting props I always thought the best one for a particular airplane
/ weight / motor combination was the one that offered the highest vertical
up speed. Try several, fly the one you like.
Jim Hiller

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of J Shu
Sent: Wednesday, March 11, 2009 1:19 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] OS-120 tank and prop size

Sorry, airframe is 4 3/4, motor is 21oz, 8oz in servos, another 15oz for
spinner and prop... 8 more for the rest. Looks more like
8lbs... I need to recheck my math next time...lol.

Regards,
Jason
www.shulmanaviation.com
www.composite-arf.com

----- Original Message -----
From: "Bob Richards" <bob at toprudder.com>
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, March 11, 2009 4:09 PM
Subject: Re: [NSRCA-discussion] OS-120 tank and prop size


>
> 6 pounds. Hmmmm, don't you think you will need a bigger motor? ;->
>
> Bob R.
>
>
> --- On Wed, 3/11/09, J Shu <jshulman at cfl.rr.com> wrote:
>
>>
>> It'll be run on a
>> muffler in a 6lb pattern
>> plane.
>>
>>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>


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