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Modefo's RC Helicopters . XHELI.COM . Autography FlightPower

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Miniature Aircraft Nitro/Gas Helicopters > Fan trouble
 
 
G. Williams
Heliman
Location: North Carolina

Need some help, Guys. I am trying to set the runout on a machined MA fan. It is being installed on a YS .61ST II. With the nut just snugged down the runout is .0005. With the nut tightened, the runout varies from .0035-.009. depending on how the collets are turned. I have determined that the nut, a YS item, is tapped .005 out of center. Is it possible that this nut is also not tapped at a right angle? I am thinking that if the nut is not tapped properly it may be cocking the top collet to one side which is cocking the fan also. Any help appreciated. Gerald.
03-20-2002 Over year old.
 
 
G. Williams
Heliman
Location: North Carolina

Well, I was wrong. Again. Called the nice folks at MA and they got my mind right. Here's what, forgot his name-sorry, suggested. Tighten the nut on the fan. Dial indicate the inside of the fan where the uniball on the clutch fits. Adjust with a dead blow hammer. It won't hurt your engine if you take it easy. The threaded portion of the crankshafts can vary some and this was allowing the fan to shift when the nut was tightened. After four carefully planned and perfectly executed strikes, the runout measured .001. I am happy . Thanks, MA. Thanks to all who looked at my post and I hope this information will be of help to someone else. Gerald.
03-21-2002 Over year old.
 
 
maybeim
Senior Heliman
Location: Stockton, California

Thanks G. Willams for the info.

Paul A.
03-23-2002 Over year old.
 
 
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Advantage Hobby . Revolution Models . CarbonXtreme

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Miniature Aircraft Nitro/Gas Helicopters > Fan trouble
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