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

[J Shu]

That's what happens when I don't have props and spinners around. OK, safe guess around 8...lol.

I'll look into props as I don't have many with 10 pitch. I think I gave Dave the last of my 15-10's a few years back, maybe he still 
has one.

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

----- Original Message ----- 
From: "J N Hiller" <jnhiller at earthlink.net>
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, March 11, 2009 8:35 PM
Subject: Re: [NSRCA-discussion] OS-120 tank and prop size


> 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.
>>>
>>>
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>>
>
>
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