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HomeAircraftHelicopterKasama Srimok 90 › CROWN GEAR FIX !!!
10-12-2011 05:08 PM  6 years agoPost 1
choper city

rrNovice

Houston tx

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HELLO GUYS i am sure some of you are having problems stripping crown gears . I went throw six crown gears trying to get my kasama e flying .Well a friend of mine and JR man said to look at teeth on tail pinion gear 22 tooth. The teeth needs to be grind down on booth sides of the tooth. They are to sharp and cut into the crown gear and strip out . There is a nice guy by the name of gasbag on RR who post pic of vigor cs fix with the same problem. ITTT WWWorkSSSS I have sixty flights on it and NOOO!! problem. But my flying skills i crashed hard!!! good flying GUYS and GIRLS Hot Rod ! runryder.com/t22629p1/ web site RR

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10-19-2011 12:54 PM  6 years agoPost 2
HeliBenj

rrApprentice

Provence, France

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INteresting, how do you go about grinding the bevel pinion?

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10-19-2011 02:00 PM  6 years agoPost 3
haq0901

rrVeteran

Miami, FL USA

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Helibenj, it's simple just make the edges of the teeth in both front end and back a little round to remove the sharpness from them. I know this sounds promising but even after I did this it did NOT help me when doing HARD 3d with a powerful motor(10kw) it would always let go even when lubing with die electric grease EVERY flight. But on my nitro Kasama I never had any issue because of the lack of power in comparison to E-heli. Now I did notice that if your tail pinion sits in the center of your crown gear it does NOT help to grind the edges because they are never in contact..... That said I noticed an inconsistency between all three Kasama helis I had 2 90e and 1 90n. Nitro bird was the only one perfect and centered. But that is just my personal experience.

Before you grind check and see if your pinion is centered on crown, and if it is try using die electric grease on your crown.... That will help keep the heat down while in 3d flight. I will say this again the 90e does not take well to high hp motor being flown hard.
I'm not talking big air either, more like close quarter pop lock style WILL destroy the crowns. I know because I went through $350 in gears until I accepted the fact of not being able to run powerful setups.

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10-19-2011 02:10 PM  6 years agoPost 4
HeliBenj

rrApprentice

Provence, France

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Well I was just being curious because I have no real problem with crown gear on my nitro. I did strip 2 of them with CGY750, stupid piro rate and very agressive stops + too lose a mesh. Now it's OK it seems.
So in essence you could chuck the pinion and it's shaft in a drill and smooth the angle on the teeth with a sremel both fornt and back?

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10-19-2011 02:13 PM  6 years agoPost 5
HeliBenj

rrApprentice

Provence, France

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Forgot to add that my pinion does ride in the middle, or better said the opposite, the crown gear rides in the middle of the pinion.

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10-19-2011 02:33 PM  6 years agoPost 6
haq0901

rrVeteran

Miami, FL USA

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^^^^^^ Correct! I'm the one that said it incorrectly.... The crown should ride In The center of the pinion. You should be fine as is...

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10-19-2011 10:13 PM  6 years agoPost 7
Mercuriell

rrApprentice

Sunshine Coast, Queensland, Australia

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YOu can get a drill mounted wire brush and go over the pinion with that = dulls down the edges a bit - I used to do that with some 3rd party pinions on Trex which were very sharp and hard on the edges.

John

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