700 Stripped gear with CNC Bearing block

[Stuart]

Dave stripped the gear on his 700 today, thankfully not crash as a result but sounded awful as they do then they go. Just about 99% of the gear was stipped.

I believe this is the micro heli replacement main gear with the CNC block mod also.

[t-rex pedro]

I've read a few bad reports of that Microheli gear. My std gear been ok with the new CNC block but when the -1 Align part is available I will try one of those if the std one strips.

[electricsceadu]

mod it so the gear mesh is adjustable and try the third mainshaft bearing block mod
and lets all email align and tell them what c**p they are selling

[Sieze2]

On helifreak there has been reports like this as well. What I will say is that since I adjusted the mesh on my 700 the gears last alot longer.

[ChrisB]

When Mr Krause was jotting his ideas down on a beermat he shoulda noted

1 Mod 1 Gears
2 Metal clutch stack
3 3rd bearing block

seems he did neither.

maybe he did write,lets get this puppy on the market before the 08 season is over.

[t-rex pedro]

When Mr Krause was jotting his ideas down on a beermat he shoulda noted

1 Mod 1 Gears
2 Metal clutch stack
3 3rd bearing block

seems he did neither.

maybe he did write,lets get this puppy on the market before the 08 season is over.

I agree Chris. Since when did being a good pilot give you an engineering degree?!

Edit: Maybe he does have an engineering degree, I dont know, but he sure did get this one wrong.

[Andy from Sandy]

A chap at the field also lost a main gear on his 700 yesterday.

When looking at the Synergy and Vibe 90s the teeth on the main gear are much larger. I just think the teeth size is too small on the 700s main gear.

[electricsceadu]

When Mr Krause was jotting his ideas down on a beermat he shoulda noted

1 Mod 1 Gears
2 Metal clutch stack
3 3rd bearing block

seems he did neither.

maybe he did write,lets get this puppy on the market before the 08 season is over.

he left it to the r&d department
otherwise known as the rest day department as they sure was having a nap when they did the 700 gear train

[machasm]

A chap at the field also lost a main gear on his 700 yesterday.

When looking at the Synergy and Vibe 90s the teeth on the main gear are much larger. I just think the teeth size is too small on the 700s main gear.

I notice that even on araptor 90 the gear teeth appear to be meatier.
Looks like there was a lot of room for improvement on this.
adjustable gear mesh
Beefier teeth on the main gear
3rd bearing block
Not fit for purpose really. We must be muppetts to be in this game!

[ChrisB]

The gears on all other 90`s are called Mod 1,,Align decided to use Mod 0.7 hence they are smaller and weaker.

I cant believe they honestly expect them to take day in day out the torque a modern 90 can deliver.

[machasm]

The gears on all other 90`s are called Mod 1,,Align decided to use Mod 0.7 hence they are smaller and weaker.

Ah!!
The penny drops. Never really understood what people meant by mod 1. Now I know.
Cheers Chris.

[Craig33]

All you need to know.

http://www.roymech.co.uk/Useful_Tables/Drive/Gears.html

Pretty sure most of the stuff on that page is taken directly from machinerys handbook. Every mechanical engineers first port of call.

[Nige]

Does anyone in the UK have the updated 700 main gear HN7019T-1 in stock?

They all seem to list just the HN7019T version.

I tried the MicroHeli gear but that did not very last long!

[moyesboy]

Ah Roymech, such a useful resource but slowly vanishing I think...
Module. (m) ...... The length, in mm, of the pitch circle diameter per tooth
Of course there are many different aspects of the tooth design that could have given the align gear more strength despite the smaller module number...
however given the hammering variations of tourque from the ic power plant bigger teeth has got to be best.
They could do something without changing the mould tool like kevlar pulp filler perhaps...

[machasm]

I've also noticed that the length of the pinion would allow for a longer toothed Main gear.
They could also produce a main gear with physically longer teeth so that there is more material to spread the load over.
Would that be viable?
Also what about a stronger material for the main gear? Metal perhaps?