TT Pro 1.20 Question

[Rcmaster199 at aol.com]

Paul keep in mind that some folks run 90 2 strokes on moderately sized planes 
similar to yours. The 120 should be extra insurance and you don't have to fly 
it at full throttle. The extra ponies will allow some additional play time 
with other props for speed and noise suppression

Good Luck

MattK


> Subj:Re: TT Pro 1.20 Question 
> Date:6/29/2004 7:58:11 PM Eastern Daylight Time
> From:pwl45 at yahoo.com
> Reply-to:discussion at nsrca.org
> To:discussion at nsrca.org
> Sent from the Internet 
> 
> 
> 
> I'm just experimenting with what I have laying around.
> I had previously flown this plane with a YS .91 and it just didn't have the 
> power to fly Intermediate well.
> I deduced that 2M planes were being flown with 1.70's at 10 - 11 lbs, so the 
> 1.20 would have comparable power on a 9 lb plane.
>  
> 
> >> ----- Original Message ----- 
>> From: Rcmaster199 at aol.com 
>> To: discussion at nsrca.org 
>> Sent: Tuesday, June 29, 2004 7:35 PM
>> Subject: Re: TT Pro 1.20 Question
>> 
>> 
>> It sounds like a pumped set-up. The tank vent should be left open during 
>> operation, to allow air to enter as the fuel is used up. The caveat is that 
>> the vent will often syphon fuel out if the vent is out in the slip stream. I 
>> use a YS check valve to allow air in but no fuel out.
>> 
>> The 2 stroke 120 engine type should be able to turn a 16x10-11;  17x9-10 
>> fairly well in the usable rpm range we need.
>> 
>> Why such a large engine on such a small model?
>> 
>> MattK
>> 
> 

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