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Competition News / Re: NLMFC Competition SATURDAY October 6th
« Last Post by Joe Wotton on Yesterday at 08:09:13 PM »
Just noticed there are 17 confirmed pilots,and the reserve list starts at 16,does that mean anyone now entering will be on the reserve list?
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Competition News / Re: NLMFC Competition SATURDAY October 6th
« Last Post by Steve Edwards on Yesterday at 07:45:06 PM »
Hi


Just to let you know, we can probably take another 3 masters/intermediate or FAI Pilots only, so if interested please enter.


Great amount of Clubman pilots so far


Thank you


Steve
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IC Power / Re: Dark Oil from exhaust pipe
« Last Post by Mike Watters on Yesterday at 07:38:41 PM »
Thanks Keith for your reply.


 I never thought of checking the pipe / header for carbon build-up.
I removed the header, and connected to a hose pipe and blew cold water through, didn't seem anything untoward .Cleaned the water out with neat thinners.


Now the pipe, it's never been cleaned. Cleaning up the end of the pipe, and blowing through the pipe, (crude test) there feels a bit of restriction due to the residule black oil, as expected.


Connected to the hose pipe cleared with water, blowing through the pipe is easier.
However, adding the silicone to the end of the pipe, and doing the same crude blow test, there is more of a restrictive feel.


The only proof is to run the engine and see if the silicone deflector is the problem, like Mike says, causing more blow back.


Mike.

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IC Power / Re: Dark Oil from exhaust pipe
« Last Post by Mike Wood on Yesterday at 07:11:10 PM »
Just thought, the other thing about the rubber stinger is that if it starts oscillating it can effectively reduce the
size of the bore, it's worth a try without so you can discount it if no difference is detected.

Mike
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General Pattern Discussion / Re: Roast Catfish!
« Last Post by Mike Wood on Yesterday at 07:07:49 PM »
Best of luck.

Mike
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General Pattern Discussion / Re: Roast Catfish!
« Last Post by Peter Jenkins on Yesterday at 06:32:16 PM »
Nice job Graeme.  Good luck with the maiden flight.
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General Pattern Discussion / Re: Roast Catfish!
« Last Post by Graeme Jones on Yesterday at 04:25:37 PM »
Finished and ready for flight. The last few days have been spent battling annoying little snags. For example I waste hours trying to fit the captive nuts for the undercarriage bolts. It was only when I fully tightened the first one and stripped the thread that I realised what the problem was. At some point in the dim and distant I must have mixed up metric and imperial nuts and bolts i.e. M3 and 6BA. Little wonder I couldn't get them to fit. Anyway, ten days over target, but it's still the quickest I've built a model in years, the quickest ever for one of this size. If my partner and I were married she would probably have divorced me by now!


Next step is to do some test with various props, then I'll be off to the field for a test flight.


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IC Power / Re: Dark Oil from exhaust pipe
« Last Post by Keith Jackson on Yesterday at 02:52:23 PM »
Hi Mike,

Black oil out of the YS 4 stroke exhaust is normally a result of the oil being burnt at high temperatures. If its coming out light brown, this is ideal. I think the rubber stinger may be a factor. I also have experienced twice now exhausts becoming blocked after prolonged use. Maybe worth seeing if when you blow though it that there is not undue restriction? Also look for carbon build up at the curved part of the header pipe.

Thanks

Keith
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IC Power / Re: Dark Oil from exhaust pipe
« Last Post by Mike Watters on Yesterday at 01:44:46 PM »
Thanks again, Stuart & Mike for your replys.


I looked at the silicon deflector at the end of the pipe, it's a fraction larger diameter than the aluminum pipe outlet. It doesn't appear to be restricting the outlet.


As I'm really only using this pipe setup, more for nostalgia reasons with this older style of model, it does have the benefits of being very, very quiet.


I'm wondering if it might be worth trying one of the modern Hatori short pipes with a ridged header, as these short pipes are designed for the smaller YS motors.


Mike
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Hi Matt,have spoken to the BMFA and they said I can pay you on the day if thats ok with you?
Regards Joe
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