Matt Theron Posted March 11, 2009 Share Posted March 11, 2009 I have fitted a Enya SS40 into a four star forty plane that I have just completed building and have not forseen the problem that the needle valve is far too short to be set and will have to somehow be extended. Has anyone got an idea on how to do this as I have no clue how to approach this one - I will need about three quarter to an inch extention. All ideas are welcome. Cheers Matt Quote Link to comment Share on other sites More sharing options...
David Ashby - Moderator Posted March 12, 2009 Share Posted March 12, 2009 Matt - is there a hole in the top of the needle into which a wire extension can be put / soldered / screwed ? Failing that I've seen thin plastic tube (sometimes fuel tube) slid down over the needle to extend it up and out of a cowl opening. Quote Link to comment Share on other sites More sharing options...
Matt Theron Posted March 12, 2009 Author Share Posted March 12, 2009 Hi David, The needle valve has no holes at the top and the needle itself goes all the way up and is secured at the top (where you screw it in or out) thus making it impossible to drill incase of damage. Your mention of the use of a piece of plastic or fuel tube is most welcome and I will use this method if no other enthusiast comes up with a more suitable idea. Cheers Matt Quote Link to comment Share on other sites More sharing options...
David Ashby - Moderator Posted March 12, 2009 Share Posted March 12, 2009 I've an old Enya SS40 'extended' collecting dust in the garage Matt but I can't for the life of me remember how it's been done (it's not a fuel tube). I'll take a picture tonight and post here... Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted March 12, 2009 Share Posted March 12, 2009 I've extended Enya and similar needles by silver soldering a bolt to the end of the knurled needle collar, with the bolt head against the needle so a piece of tubing can be screwed onto the bolt thread as a flexible extension. For a more rigid extension, I've used a length of brass tube, with a screw soldered in the end to provide a slot for reference. This was on a needle where the blunt end of the needle protruded from the collar, giving a nice location for the tube and more soldering area. The thing to bear in mind is that a rigid extension can resonate and cause wear in the needle valve threads, resulting in an air leak developing over a period of time. That's why I prefer the flexible tube approach. Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted March 12, 2009 Share Posted March 12, 2009 hello matt-i use a bit of 1/4 hardwood dowel with a plastic pen top fastened to it which is a snug fit over the needle --when the engine is warmed up i adjust the carb and that's it-the only time it need's to be altered are a change of fuel or change of temp summer to winter...an extension on the needle will eventually damage the minute hole inside the carb-due to vibration--even more so on four stroke's...go'es from round to egg shaped and then it's very hard/impossible to tune....(new carb time=££££...... ken anderson............. 1/4 dowel about 6in long............ Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted March 12, 2009 Share Posted March 12, 2009 hello bob-you and i have posted together-in the same vein of thing's....... ken anderson.......... Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted March 12, 2009 Share Posted March 12, 2009 Ken, you know what they say about great minds Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted March 12, 2009 Share Posted March 12, 2009 hello again bob----yes they all end up trying to defy gravity with bit's of wood............ ken anderson................. Quote Link to comment Share on other sites More sharing options...
David Ashby - Moderator Posted March 12, 2009 Share Posted March 12, 2009 Here you go... Quote Link to comment Share on other sites More sharing options...
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