[NSRCA-discussion] Gas pattern options

[J Shu]

Is there any information on this OS-160 gas conversion set-up?

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

----- Original Message ----- 
From: "Mark Hunt" <flyintexan at att.net>
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Sent: Sunday, December 13, 2009 1:23 PM
Subject: Re: [NSRCA-discussion] Gas pattern options


>I will chime in...George let me fly his Black Magic with the gas OS160 and I 
> was pleasantly surprised.
> Smooth, easy to manage power (like an OS140).  Very good power with an 
> 18.1x10 (I believe) despite the large airframe.  I did have to bring on the 
> throttle sooner, just like any 2 stroke compared to a YS (or electric).  I 
> did an upline snap with good success, which again surprised me.  George's 
> setup got the plane very deep into the snap in the upline, but it pulled out 
> of it and kept going.  The very low idle was very noticable in flight as 
> well.  The motor spools down very quickly from high to low throttle (leaner 
> mixture I guess because of the ignition) making downlines much easier to 
> manage than a glow 2 stroke.
> 
> I think the OS gas setup or this new Syssa is begging for a custom designed 
> light wood airframe or something like the bravo or abbra....  In the right 
> hands this setup could be found mixing it up in masters...no problem.
> 
> 
> -Mark
> 
> 
> ----- Original Message ----- 
> From: <glmiller3 at suddenlink.net>
> To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
> Sent: Sunday, December 13, 2009 09:47
> Subject: Re: [NSRCA-discussion] Gas pattern options
> 
> 
>> Carl,
>>
>> I'm experimenting with a gas conversion OS160 using an Aeroslave pipe. 
>> Lance says the pipe isn't "built for gas temperatures" but so far I've had 
>> more trouble with headers and couplers...pipe seems to be holding up fine.
>>
>> I hope I'm through the learning curve with this system and can fly it next 
>> season competitively.  It doesn't have the "stupid power" that a YS 170 
>> does, but Mark Hunt has flown the P9 sequence with it and it I think his 
>> assessment was that the power was adequate.   Perhaps he'll chime in here. 
>> The power is certainly plenty for the Advanced sequence that I'm flying.
>>
>> George
>>
>> ---- CHV69 at aol.com wrote:
>>
>> =============
>> How about sound? Are we able to use the existing carbon fiber pipes
>> available now like the Aeroslave and ES pipes with the gasoline engines? 
>> Or are
>> specially made pipes required?
>>
>> Carl
>>
>>
>> In a message dated 12/13/2009 9:31:36 A.M. Eastern Standard Time,
>> vicenterc at comcast.net writes:
>>
>> Correct.  However, fuel cost would make a difference if we could  use
>> gasoline.  After my experience, I don't think gasoline engines  available 
>> in that
>> time were viable option for pattern for higher  classes.  However, it 
>> could
>> work for lower classes.  I am not sure  what gasoline engines 
>> manufacturers
>> are offering to increase power  today.  Gasoline engines for sure are more
>> reliable in the low run than  glow engines.  Another issue, vibration of
>> gasoline  engines requires special attention but is similar to the 
>> situation we
>> have when using glow engines.
>>
>>
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> 
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