stripped Main gear?

[RotaryBliss]

Okay .. I'm hoping this is an isolated incident.. about the 10th flight I was beginning to have fun with the 90 half tank I was just doing a full coll climbout and the main gear knocked off about 4-5 teeth.. my lash I feel was perfect.. not tight.. but just tight enuff there was just a miniscule amount of backlash. about the thickness of paper.... where's everyone running theirs? Anyone else come across this ?

[Foxden]

That's how I set the mesh on both of Steven's

[Mizark]

I also stripped one single tooth off mine on the weekend, my mesh may have been a tad loose but not enough for me to think it would strip the gear.

The strange part is that it doesnt look like a normal stripped gear, it looks like the tooth has just clean snapped off.

[RotaryBliss]

yes, the 4 teeth snapped off and the trailing others are mashed from the engine spooling up on it I presume. very odd indeed

[Mizark]

OK mine is different to that, mine just looks plain snapped off

[RotaryBliss]

if Im not mistaken.. the 5 teeth are snapped off

[MaSt0RaS]

Guys when you set you mesh on the nitros when you have the pinion stoped and you move the maingear you hear the tic tic tic.. Right??

On nitros you can have a little mesh i think ... on electric you must not have Mesh... it must be tight...!

[RotaryBliss]

I dont think you want any mesh to be too tight, as it will cause friction and rob power. even on my electrics I use the paper method for setting the lash between the gears..

[Foxden]

Originally Posted by RotaryBliss

I dont think you want any mesh to be too tight, as it will cause friction and rob power. even on my electrics I use the paper method for setting the lash between the gears..

I have two type of paper, a 20lb weight and 24lb weight, these have two different thickness's, I always use the 24lb for printing my work related documents, I had a ream of 20lb which feels very flimsy, the mesh seems to feel very good with the 24lb, haven't stripped any gears in a very long time.

[RotaryBliss]

On my Outrage Helis, I use Paper made from the finest hand picked trees.. felled on a bed of cotton and played classical music on the trip to the paper mill.. where trained professionals pulp the wood in a climate controlled environment ( by hand )only when the tree feels ready to be put to use.. then rolled out on imported 2000 thread count sheets to dry. for My Align helis.. any 1 ply TP ripped off a honeybucket roll works..

[Mizark]

Originally Posted by RotaryBliss

if Im not mistaken.. the 5 teeth are snapped off

No they look stripped compared to mine, mine is a clean cut & only one tooth.

[RotaryBliss]

Originally Posted by Mizark

No they look stripped compared to mine, mine is a clean cut & only one tooth.

in this photo, the teeth are clearly missing.. the teeth after the missing ones are stripped from the pinion spooling up in the blank spot..

[dunkonu23]

Man, I'm thinking it looks like it was a slightly out of round gear where the mesh was good for every place but the place where the teeth stripped and then snapped from the free rotating pinion strike.

Scott

[Mizark]

Originally Posted by RotaryBliss

in this photo, the teeth are clearly missing.. the teeth after the missing ones are stripped from the pinion spooling up in the blank spot..

OK yeah cool I agree, sorry for the confusion.

Mine was even stranger as I only lost one! I am not sure in what part of the flight it happened as I didnt notice until I was re-fuelling. I was beating on pretty hard too.

[Foxden]

Originally Posted by RotaryBliss

On my Outrage Helis, I use Paper made from the finest hand picked trees.. felled on a bed of cotton and played classical music on the trip to the paper mill.. where trained professionals pulp the wood in a climate controlled environment ( by hand )only when the tree feels ready to be put to use.. then rolled out on imported 2000 thread count sheets to dry. for My Align helis.. any 1 ply TP ripped off a honeybucket roll works..

LOL

[RotaryBliss]

Originally Posted by dunkonu23

Man, I'm thinking it looks like it was a slightly out of round gear where the mesh was good for every place but the place where the teeth stripped and then snapped from the free rotating pinion strike.

Scott

Sure, that would be the case, If indeed I was flying my helicopter with the engine running backwards, but in the order shown, the teeth snapped first, then the stripping occured. The photo is the top of the gear.

[dunkonu23]

Oh, well.. Looks like you know the cause. Have fun with it.

Failures happen, life goes on.

Scott

[Mrktplayer]

Easy, use 2 bad main gears to make 1 good one.

[RotaryBliss]

Originally Posted by Mrktplayer

Easy, use 2 bad main gears to make 1 good one.

leave them in a dark room together with some soft music and candle light and they make new ones?

[Down Low]

Are the 90 gears injection molded or machined ?

If injection molded, there is potential to degrade the plastic simply by the process tech over heating the plastic. Or perhaps a small amount of different plastic made it into the process from a previous run, changing the properties of the material. These things can easily happen and would likely only effect a very small amount of product.

DL