Main gear

new bee · 07-18-2012, 11:18 PM

Was wondering if I could get some feedback on this set up?
http://www.microheli.com/store/produ...321dfb6bca7af0

Tasteles · 07-19-2012, 01:52 AM

I was looking at that also. I think it's pretty much useless though because you still won't have tail control to do auto-rotations. I noticed that they have two setups to use it on different shaft and also to work with the older shafts. Wait I see now that you can also use that without a oneway bearing. Interesting!

UKHeliBob · 07-19-2012, 01:53 AM

As you know, the popular belief is that the main gear is designed to slip down the shaft in the event of a crash to avoid damage to itself and other parts of the heli if it crashes with the motor running. I have always been sceptical of this as I believe that there is no evidence for it but I am prepared to put up with pushing the gear back up again when necessary in case it is true.

I have seen reference to people putting a screw through the stock main gear to hold it in place and they report that it causes no problems.

Checking that the gear has not slipped down is part of my pre-flight checks for every flight and pushing it back up only takes a few seconds.

The fact that the gear linked to is made of Delrin may be more a of a problem than it being fixed to the shaft as I remember bad feedback about the Xtreme Delrin main gear but I too would be interested to hear any feedback on replacement main gears.

new bee · 07-19-2012, 07:45 AM

Quote:

Originally Posted by Tasteles

I was looking at that also. I think it's pretty much useless though because you still won't have tail control to do auto-rotations. I noticed that they have two setups to use it on different shaft and also to work with the older shafts. Wait I see now that you can also use that without a oneway bearing. Interesting!

Yea I could care less about the one way bearing. Still wonder how it would hold up. To late for me to find out though. Already placed my order and passed on this.

boltsinneck · 07-19-2012, 08:21 AM

I'd still like to know if there is any advantage between the CNC main gear and the injection molded one.

new bee · 07-19-2012, 08:24 AM

Quote:

Originally Posted by boltsinneck

I'd still like to know if there is any advantage between the CNC main gear and the injection molded one.

+1

MiataJohn · 07-19-2012, 12:58 PM

"In theory" the CNC gear should have tighter tolerences the a moulded one. Somebody would have to measure each one.

jabu32 · 07-19-2012, 02:27 PM

anyone have a link to the cnc gear?

boltsinneck · 07-20-2012, 08:50 AM

Quote:

Originally Posted by jabu32

anyone have a link to the cnc gear?

CNC Main Gear with Hub:
http://www.microheli.com/store/produ...58a42aa7fb3662

Molded Main Gear with Hub:
http://www.microheli.com/store/produ...roducts_id/759

Scroll down close to the bottom of this page to see the hub and gears seperately:
http://www.microheli.com/store/index.php/cPath/3_69

07-18-2012, 11:18 PM	#1
new bee Join Date: Jan 2012 Location: central illinios	Main gear Was wondering if I could get some feedback on this set up? http://www.microheli.com/store/produ...321dfb6bca7af0

07-19-2012, 12:58 PM	#7
MiataJohn Registered Users Join Date: Nov 2010 Location: Deland, Florida	"In theory" the CNC gear should have tighter tolerences the a moulded one. Somebody would have to measure each one. __________________ 2x Stock mCPX, 1 B/L HP05 mCPX Blade 400 3x HS65mg, GY520, Align 425 Mini Protos 3x HS5065mg, AR7200BX, JR290 Trex 500ESP,Parkzone T-28, All on Dx6i AMA 732104

07-19-2012, 02:27 PM	#8
jabu32 Registered Users My HF Map location Join Date: Jan 2011 Location: Indianapolis, IN	anyone have a link to the cnc gear? __________________ Hello My Name Is Joe Blade mCP X BL - HP06V2 / Blade mCP X BL - Spin 16.3K / Blade 400 - DS760, 450MX / Trex 500ESP DFC - AR7200BX, 500MX / Trex 550e DFC - AR7200BX, 600MX

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07-19-2012, 01:52 AM	#2
Tasteles Registered Users Join Date: Dec 2011 Location: Hillsboro, Ohio	I was looking at that also. I think it's pretty much useless though because you still won't have tail control to do auto-rotations. I noticed that they have two setups to use it on different shaft and also to work with the older shafts. Wait I see now that you can also use that without a oneway bearing. Interesting!

07-19-2012, 01:53 AM	#3
UKHeliBob Registered Users My HF Map location Join Date: Aug 2011 Location: UK	As you know, the popular belief is that the main gear is designed to slip down the shaft in the event of a crash to avoid damage to itself and other parts of the heli if it crashes with the motor running. I have always been sceptical of this as I believe that there is no evidence for it but I am prepared to put up with pushing the gear back up again when necessary in case it is true. I have seen reference to people putting a screw through the stock main gear to hold it in place and they report that it causes no problems. Checking that the gear has not slipped down is part of my pre-flight checks for every flight and pushing it back up only takes a few seconds. The fact that the gear linked to is made of Delrin may be more a of a problem than it being fixed to the shaft as I remember bad feedback about the Xtreme Delrin main gear but I too would be interested to hear any feedback on replacement main gears.

07-19-2012, 08:21 AM	#5
boltsinneck Registered Users Join Date: Dec 2010 Location: Maryland	I'd still like to know if there is any advantage between the CNC main gear and the injection molded one.