RunRyder RC
WATCH
 1 page 842 views POST REPLY
HomeAircraftHelicopter
e-
Elec-Helicopters New or Limited Activity
Next-D › Broke 2 motor shafts - how?
06-03-2012 12:44 AM  6 years agoPost 1
danwr

rrApprentice

Maineville, OH

My Posts: All  Forum  Topic

I put together a Rave ENV with a 700MX, castle 120HV2, AR7200BX, Align servos powered by a Hyperion 2S life RX pack. All parts used except life pack and AR7200BX which are new. On about the 10th flight the power cut. I was low and was able to flip it upright but it landed hard and broke a landing skid. Repaired. Read about problems with auto bearing lining so I removed/cleaned and properly replaced. Took motor shaft out and reinstalled to make sure it hadn't slipped. Resoldered all wires to make sure joints good. Took the Rave out and after a few easy flights I was near the deck again and the exact same scenario. Power loss and I flipped it upright but landed harder. Broke struts, blades gone and main shaft. Get it home and I found out the 700MX ashaft had broken near where the pinion bolts on. Order all the parts including shaft and repair it again. Take it out again flying really high and just loops/rolls/tumbles. 3rd battery and same thing, power cuts. I auto in without damage and find that the motor shaft I just installed is broken.

How could this be happening? 1975 headspeed and relatively gentle flying.

PM  EMAIL  GALLERY  Attn:RR  Quote
06-03-2012 03:41 AM  6 years agoPost 2
JayL

rrVeteran

Leesburg GA

My Posts: All  Forum  Topic

I had the same thing happening once and found the pinion support was putting a side load on the shaft once it was tightened sounds like what u have going on. The tabs on the pinion support were actually bent alittle looked fine until tightened would look their first. I had to replace the motor mount and pinion. Once this was done never broke another shaft.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 842 views POST REPLY
HomeAircraftHelicopter
e-
Elec-Helicopters New or Limited Activity
Next-D › Broke 2 motor shafts - how?
 Print TOPIC  Make Suggestion 

 1  Topic Subscribe

Friday, September 21 - 8:19 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online