Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > MSH Protos > MSH Mini Protos


MSH Mini Protos MSH Mini Protos Helicopter Support Forum


Reply
 
Thread Tools Display Modes
Old 06-21-2012, 04:20 AM   #1
macem
Registered Users
 

Join Date: Mar 2008
Location: austria, near vienna
Default some wear measurement quantities

hi all,

i replaced the blade-grip bearrings (both axial and radial) for the first time, and found the axial one nearly flatted (!) , one radial broken.

so flying the mini about 70 hours (1000 flights) raises the question about mechanical wear of the mini? (whitout consequences of crashes of course...)

i know somewhat about motor pinions, belt, servos... but do you have some experiencies ?

macem
macem is offline        Reply With Quote
Old 06-21-2012, 06:34 AM   #2
desertstalker
Registered Users
 

Join Date: Apr 2011
Location: Australia
Default

Bearings and belt would be my major concerns (including the one-way in the pinion) check all of them for wear (especially the ones in the guide pulleys).
__________________
-DX8
-MSH MiniProtos Stretched, SK720, DS95/DS95i, Hyp 4S 25C 2500mAh
-MSH Protos Stretched, Brain, Hyp DS16/BLS251, 6S 3000mAh
-Goblin 500, HC3SX, Hyp DH16/MKS980BL, Scorp 4015-1100
desertstalker is offline        Reply With Quote
Old 06-21-2012, 06:44 AM   #3
ziper_it
Registered Users
 
Posts: 1,020
 

Join Date: Mar 2010
Location: Italy
Default

I can count more than 800 flights, and only had to replace the axial after crashes, thrust being still good.

The weakest are the ones on the tail, as the slightest touch may destroy them.
ziper_it is offline        Reply With Quote
Old 06-21-2012, 10:59 AM   #4
kjoer
Registered Users
 
Posts: 352
 

Join Date: Sep 2011
Location: Venlo, The Netherlands
Default

1000 flights is massive! I'd expect the thing to drop out of the sky without thorough maintenance, but I guess it didn't.


Over 300 flights here, no crashes yet.

Belt and pinion are completely toast, replaced them, waited too long with it though, should have prolly changed them after around 150 flights.

I've changed the tail blade grip bearings a few times. Other than that, nothing. Oh, the dampers, but they were still ok.
__________________
http://www.xs4all.nl/~rzavelli/rc_heli.txt
kjoer is offline        Reply With Quote
Old 06-21-2012, 12:55 PM   #5
ziper_it
Registered Users
 
Posts: 1,020
 

Join Date: Mar 2010
Location: Italy
Default

Dampers, I forgot about them. Changed two or three times. Belt I probably would have had to replace it if it wouldn't have been damaged in a crash.
ziper_it is offline        Reply With Quote
Old 06-22-2012, 02:43 AM   #6
baui2000
Registered Users
 
Posts: 858
 
My HF Map location
Join Date: Nov 2010
Location: Brno, Czech Republic
Default

Dampers get changed every crash on mine. Other than that...stretch belt shows no signs of wear with some 300 flights and couple major crashes on it, pulley bearings all good, 15T one-way is ok.
Radial and thrust bearings in blade grips get replaced after each crash.

The only thing I change as a precaution are motor bearings, all my Scorpions get sealed high quality ones right out of the box.
__________________
Tom
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Team Lynx Heli Innovations
Goblin 700
V-Bar Silverline, Quantum 4530-500, YGE 160HV-K, MKS HBL 950/HBL980
Prtos Mini
Brain
baui2000 is offline        Reply With Quote
Old 06-22-2012, 04:08 AM   #7
kjoer
Registered Users
 
Posts: 352
 

Join Date: Sep 2011
Location: Venlo, The Netherlands
Default

Didn't use silicone spray on my first belt, might explain the wear.
__________________
http://www.xs4all.nl/~rzavelli/rc_heli.txt
kjoer is offline        Reply With Quote
Old 06-22-2012, 04:43 AM   #8
macem
Registered Users
Thread Starter Thread Starter
 

Join Date: Mar 2008
Location: austria, near vienna
Default

thanks a lot ... so i have some more open items on my check-list

for most of us the motor pinions seem to be the most critical parts (replace after 150 - 300 flights), followed by the tailrotor-bearrings, dampers and belt (although esp the dampers seemed to me undestructible... )

furthermore i found the endurance of the servos (i tested hs65hb, savoxsh0254, align ds410) very similar by 400 flights on average, the old motor adapter by 500 flights (the special shaft will keep much longer...) - and now the bladegrip-bearrings by 1000 flights... but it should be replaced a little bit before, i guess

macem
macem is offline        Reply With Quote
Old 06-22-2012, 07:27 AM   #9
baui2000
Registered Users
 
Posts: 858
 
My HF Map location
Join Date: Nov 2010
Location: Brno, Czech Republic
Default

Almost forgot servos... SH-0257MG on FBL cyclics developed noticeable slop in about 150 flights, all three of them at pretty much the same time.
__________________
Tom
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Team Lynx Heli Innovations
Goblin 700
V-Bar Silverline, Quantum 4530-500, YGE 160HV-K, MKS HBL 950/HBL980
Prtos Mini
Brain
baui2000 is offline        Reply With Quote
Old 06-22-2012, 07:42 AM   #10
kjoer
Registered Users
 
Posts: 352
 

Join Date: Sep 2011
Location: Venlo, The Netherlands
Default

Same with my MKS DS95's and DS95i, a bit of slop after 300 flights. No idea how their wear compares to other servos though.
__________________
http://www.xs4all.nl/~rzavelli/rc_heli.txt
kjoer is offline        Reply With Quote
Old 06-22-2012, 10:47 AM   #11
ziper_it
Registered Users
 
Posts: 1,020
 

Join Date: Mar 2010
Location: Italy
Default

Already replaced one pinion and half (the second was still usable but I wanted to try the 17T).
Lot of slop on 5065 compared to the same servos mounted on my other old, non-FBL 450. May it be due to the higher stress from the FBL system?
ziper_it is offline        Reply With Quote
Old 06-22-2012, 08:01 PM   #12
th0rg0d
Registered Users
 
Posts: 1,209
 
My HF Map location
Join Date: Oct 2006
Location: Everett, Wa (Seattle)
Default

Quote:
Originally Posted by kjoer View Post
Didn't use silicone spray on my first belt, might explain the wear.
I have some silicone spray, how many flights should I be applying it?
__________________
Mini Prtos AR7200BX
Prtos stretch AR7200BX Savx 1250/1290MG SAB 470mm
ALeeS Rush 750 YGE 120HV/4035-530 AR7200BX Savx 1258/1290MG Rail 696/116
mCPx stretch uHeli head DX18 AMA# 448427
th0rg0d is offline        Reply With Quote
Old 06-22-2012, 08:10 PM   #13
kjoer
Registered Users
 
Posts: 352
 

Join Date: Sep 2011
Location: Venlo, The Netherlands
Default

I have no idea about the interval, am rebuilding the Mini Protos right now with a new belt, sprayed with silicone. You can see the difference when a belt is completely dry or not though.

(Doesn't seem critical for this heli. With a brand-new Gobler, if you don't use silicone spray on the initial build, the main motor belt starts protesting after 20 runs. You can hear it there, made me start to use silicone spray.)
__________________
http://www.xs4all.nl/~rzavelli/rc_heli.txt
kjoer is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > MSH Protos > MSH Mini Protos


MSH Mini Protos MSH Mini Protos Helicopter Support Forum

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Copyright © 2004-2011 - William James - Helifreak.com