[NSRCA-discussion] 120 AC issues

[Stuart Chale]

I'll have to pull it a part again and see if I see anything with the sleeve.
Anyone else have any thoughts?
Thanks,
Stu

Gene Maurice wrote:
> There was a Dalotel kitted by Dick Hansen back in the early / mid 80's,
> could be his....
>
> I had the issue you are describing once with an AC. Ended up being a
> slightly out of round sleeve. Everything was fine on the ground and early
> into a flight until it got really hot. When it heats up it causes the sleeve
> to further warp resulting is a total loss of power. When the engine was
> disassembled I could see a discoloration on the sleeve where it was tight
> and getting excessively hot. The cure was a new sleeve, piston, and ring.
> (ouch $$$$$).
>
>
> Gene Maurice
> Plano, TX
> AMA 3408 NSRCA 877
> PACSS.sgmservice.com
> gene.maurice at sgmservice.com
>
>  
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Stuart Chale
> Sent: Saturday, July 12, 2008 8:41 PM
> To: NSRCA Mailing List
> Subject: [NSRCA-discussion] 120 AC issues
>
> OK this might cause some of you to think back into your memory banks but 
> my son is trying to fly a YS 120 AC powered Dalotel.  It was back from 
> the old pattern days and I am not sure who made the kit (FG fuse).  The 
> motor appears to be in good condition has good compression and starts 
> easily.  It runs great for the first 5 minutes or so and then will not 
> throttle up.  It has not died but loses throttle response.  It does not 
> appear to be too lean and the tank holds pressure.  The motor is not 
> real hot.  The cylinder is touchable after landing.  It seems to happen 
> consistently around 5 minutes into the flight.  I figured it was a tank 
> problem but could not find any  (changed the inside fuel line anyway).  
> The problem does not seem to be reproducible on the ground or at least I 
> didn't give it long enough to appear.  After landing and not refilling 
> the tank the motor seems to run fine and the plane can be held in any 
> attitude.  I assume that it must be something happening after part of it 
> heats up enough but I do not remember seeing this in my 120 days.
>
> Thanks,
> Stuart Chale
>
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