Advice - Post Crash
About to go for my Bronze wings on an E-flight Mentor.. Power 32 motor/Spektrum DX6 Dual receiver. separate servos for each aileron, three separate servos for flaps, elevator, rudder..Receiver and servos powered by own battery.. the 4000mah battery only powered the motor ..
Great Aircraft Btw...Nice flyer.. (sadly they don't make them any more !)
But.. I was flying round local field about two weeks ago; only three adults there...... just finished the third time practice on inwards and outwards manoeuvres... The local instructor was on the runway... with student picking up aircraft and doing debrief on way off...
Everything safe....and I went wide and round long to give them time to get off so I could practice proceedural turns etc..
On a 5 hectare site.... going wide on the site I hit the only :censor: :censor: tree in the area :mad::mad:... Mea culpa.... I COULD NOT BELEIVE IT... SO MAD at myself.... I though I was this side of it. The tree is about 600M from control area..(The club Pres.. said you wern't the first and wont be the last..)
Stuck in the very highest part of a 100m high tree the electrics remained on all night and at least the next day until it fell down...a day or so later.
Upon returning to the ground the front fuselage section foward of LE was broken off, wings separated and broken in two... BER.. The dual receiver had split as the connection had pulled out form the partner.. All the servos were mechcvnailcally connected via pushrods and they were holding the fusalage peices together..
Anyway the reason I am saying this is would anyone take the risk of using any of the receiver and servos on this....Sending the reciever back for checking and repair.. well two plus weeks and possibility of costing to repair more that a new one... The servos would have been mechanically stressed buy pushrod connections being pulled in all directions by broken fusalage and trees of falling 100M through branches...
Considering a new receiver is around $90 and five H-tech servos around $180... and I dont have a problem with funding that level..
I think I have answered my own question and say not going to take risk and will get new receiver and servos.
Any comments on reuse of equipment after a crash and your experiences of reuse of it...??
Wait a couple of days before tossing the aircraft... Then start seeing how things fit back together. You may be surprised how easy it is to repair.
The wires tend to be what gets damaged in the radio system. As long as stuff works and no sign of stripped gears I wouldn't hesitate to reuse the radio system.
Make a Cheapy Profile Plane out of 9mm Depron Foam, stick the Electronics in it and fly it around for testing the receiver and servos.
plans are in the link
As long as the receiver and servos work then they are good, I wouldn't even hesitate to use them. Being stuck in a tree for a couple of days wouldn't have done them any harm unless possibly if they got wet but if they work then they are ok.
With prop off but system on, Pull/wiggle gently on wires at motor battery, speed control, servos and at receiver/servo connections to discover any breaks in wires or damage to receiver or battery pack(s). Do a careful tethered range test with throttle in off and full throttle positions and watch for any glitching or shortened range. When/if putting it model back together watch for loosend/damaged control surface hinges, drags in servo linkage, broken control horns, stripped or poorly centering servos. Replace bent prop adapter or motor shaft. Check wheel collars, etc. If their is any suspected receiver damage send receiver for checking/repair or replace receiver.
BTW you did mean DX-6i didn't you? If you really meant old DX-6 system, recommend you upgrade to more current system like DX-6i or DX-7 or DX-8 using current model receivers.
The aircraft frame is totalled.. its in huge number of peices.. So is wing...
The motor and ESC should be ok as they weren't that stressed post fall. The 4000Mah Battery I discharged and recharged and will be checking that again...
More concerned about reuse of receiver..it was a spectrum AR6210 DMX Dual receiver and the joining wire pulled out at connector point of second receiver and bit concerned about wire tensile stress effects on joining wire.
Also Elevator/Rudder and Alerions were all intact but had mechanical stress of the flying surfaces driving them and fuselage breakup . all the pushroods pulling on servo.. as advised. might just junk and Not canabilise.
Thanks All !
I've had planes stuck in trees for 4 months over winter, rain hail wind and snow, and all that died was the battery. Then again, all my planes are extremely weather proofed, which helped. If parts get submerged in water while still "live", you can have problems then:rolleyes: Ground test everything, and try again. A chainsaw helps with these sorts of problems:p>
If you are worried about the joining wire beteen the receiver and the satellite then you can buy a new wire for a few bucks. Personally I'd just give it a close inspection and if it all looked ok and it was working ok I'd call it good to go.
Same with the servos, try them, make sure they run smoothly from end to end using you fingers to apply some resistance and to feel for any notchness or slipping that would indicate damaged teeth. If they test fine then they are good to go.
No point throwing away perfectly good kit.
Your concern over stressed gear is commendable ...
But the other guys are right ... pull / twist / run up and see if all OK.
If I replaced after each crash - I'd be bankrupt !! You'd be surprised how resilient gear is.
If you really are worried about the servos - then relegate these ones to less important roles such as Rudder ... Flaps etc. Put new in primary positions. I have servos that are marked just for this ...
Rx - surely that's worth a service check ? or as another says - for a few $ - get new lead.
Tree's - magnets for models !! We've all hit them.
Story : Friend of mine joined Brit Army ... went on Parachute training ... later flew over training jump site ... it was his first ever real jump. He landed in the only tree for miles around ... actually broke his neck but luckily no damage to chord etc.
He was invalided out after only his first ever jump !
|All times are GMT +1. The time now is 04:28 PM.|
Powered by: vBulletin
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd.
Copyright 2005 WattfFlyer.com
RCU Eflight HQ