FlyingGiants - View Single Post

hardtop351 · 09-15-2008, 01:37 AM

hi guys. i have one of these engines also. it is 1 of the original batch sent out for testing and evaluation.

i have been away from modelling for a while due to family and work commitments.....but i still have the engine....still on the stand.....and still awaiting for me to do something with it!!!!!!

anyways........

i have read the last few posts about this engine here and i would like to offer my suggestions.(yes rcign....SUGGESTIONS!!!! lmao)

i am guessing by the reference to "the hub" it means the gold coloured adaptor that the prop bolts to??..yes it is made of an alloy type material and yes it will fail if not properly attached to the engine crankshaft. i would imagine that if it failed at top speed the prop would propel itself forwards a short distance.

RCIGN is correct in saying that the keyway is for location only....it is the taper which drives the adaptor. the keyway is also there from a safety point of view in that IF the adaptor becomes loose on the taper it will move and shear the key and stop the engine.

i also have a friend who owns a machine shop and i would personally machine a new adaptor from a more suitable material. steel does come to mind but it would make any model the engine was installed into nose heavy. perhaps a more tensile grade of alloy...although you don't want the same thing happening again.

cheers

09-15-2008, 01:37 AM	#541
hardtop351 if it ain't broke don't fix it Join Date: Dec 2006 Location: rockhampton,queensland,australia Posts: 96	Re: CRRC Pro GF26I hi guys. i have one of these engines also. it is 1 of the original batch sent out for testing and evaluation. i have been away from modelling for a while due to family and work commitments.....but i still have the engine....still on the stand.....and still awaiting for me to do something with it!!!!!! anyways........ i have read the last few posts about this engine here and i would like to offer my suggestions.(yes rcign....SUGGESTIONS!!!! lmao) i am guessing by the reference to "the hub" it means the gold coloured adaptor that the prop bolts to??..yes it is made of an alloy type material and yes it will fail if not properly attached to the engine crankshaft. i would imagine that if it failed at top speed the prop would propel itself forwards a short distance. RCIGN is correct in saying that the keyway is for location only....it is the taper which drives the adaptor. the keyway is also there from a safety point of view in that IF the adaptor becomes loose on the taper it will move and shear the key and stop the engine. i also have a friend who owns a machine shop and i would personally machine a new adaptor from a more suitable material. steel does come to mind but it would make any model the engine was installed into nose heavy. perhaps a more tensile grade of alloy...although you don't want the same thing happening again. cheers