500Pro helical main gear on 500ESP?

[d-rudie]

So I wonder if any of the lucky owners of the new 500Pro will be able to compare the helical main gear to the original 162t ESP gear? Is it a drop in replacement? Of course with the helical pinion also.

Thoughts??

[blackmagic08]

I definitely want to do this, as well, if at all possible.

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[Deet]

The gearing ratio is very different, so you will get a different headspeed

[flerpie]

I becha anything the cloners will have a slant gear and pinion out before long.

[d-rudie]

I'm sure they will. Though I would prefer to stay with Align for parts as I detest the unnecessary process of tracking down issues swelling from inferior aftermarket parts.

Deet, true, the gear ratio is different. It's in between the ratio you get when running 14t or 15t pinion on the ESP main gear. I believe there are quite a few who do this in order to give their governor some headroom to move.

[Deet]

D-rudie, yeah I already worked that out and "if" I end up going to the helical I'll start using the V-bar gov at the same time.

Not sold on it yet, not sure there would be any advantage to doing it, so sitting on the fence for now.

Also no stock locally as yet.

[d-rudie]

I've been setting up Vbar gov lately and in taching my headspeed I've found that my 3026-1600kv Scorpion is actually more like 1450kv. I'm playing with 15t and 16t pinions at the moment. So any higher gearing through the helical setup is a plus for me

Might wait until some more pinions are released anyway, just in case.

[Wh1teAfr1can]

If you go to the align website it has the helical gear listed as compatible with 500e and esp so it should fit I will give it a try when someone stocks it. The new one way bearing is also listed as fitting the e and esp so we should be good to go. As far as governed head speed goes it looks like 2700 will be the ideal with the new setup

[Jotto]

I'm running my 500 on 2500 RPM. According to MrMel's headspeed calculator, the optimal governed headspeed is:

For + performance, keep req. RPM below: 2730
For target performance, keep req. RPM below: 2839
For - performance, keep req. RPM below: 2921

So 2500 will probably give a sub-optimal efficiency.

[zap357]

Anyone tried this yet. Parts have been availible for awhile and wondering if its worth giving it a go. Be good to know if the gear actually fits together in an ESP frame. Has anyones done it succesfully or found it not to work?

[ozflyer]

Originally Posted by zap357

Anyone tried this yet. Parts have been availible for awhile and wondering if its worth giving it a go. Be good to know if the gear actually fits together in an ESP frame. Has anyones done it succesfully or found it not to work?

The normal gear and slant gear differ in diameter by 1mm so nothing really, mounts for oneway bearing are exactly the same. If you are not worried about the resulting head or tail speed no problem will drop straight in.

[zap357]

Ok sounds good then. Will be using CC or vbar gov so headspeeds not a problem. Have you actually tried it and does it make big difference noise wise.

[ozflyer]

Originally Posted by zap357

Ok sounds good then. Will be using CC or vbar gov so headspeeds not a problem. Have you actually tried it and does it make big difference noise wise.

No I have not tried it but do have all the parts sitting in my hands so I can measure anything else you want to know about.

[zap357]

Cheers, i think ill just order the parts and give it go.

[Jotto]

Originally Posted by zap357

Cheers, i think ill just order the parts and give it go.

Let us know how it goes!

[flerpie]

Originally Posted by ozflyer

The normal gear and slant gear differ in diameter by 1mm so nothing really, mounts for oneway bearing are exactly the same. If you are not worried about the resulting head or tail speed no problem will drop straight in.

It's the tail speed I'm concerned about. - just reduce gyro gain? Maybe slightly
smaller tail blades? Or both? Or don't worry about it? I'm belted with
an I2 tail block. So the tail drive is slightly different. Should I also order
the lower autorotation tail drive gear? Is it a slightly different diameter also?

[zap357]

As long as the one way hub fits i dont see why it shouldnt work. If the headspeeds goverened the auto gear should be running at the same rpm and the tail should be the same speed.

I can only see it being a problem if the headspeeds not governed because the gearing is higher.

Also noticed they just released the new tail rotor assembly as well. To bad i already ordered.

http://www.infinity-hobby.com/main/p...oducts_id=7555

[ozflyer]

Originally Posted by flerpie

It's the tail speed I'm concerned about. - just reduce gyro gain? Maybe slightly
smaller tail blades? Or both? Or don't worry about it? I'm belted with
an I2 tail block. So the tail drive is slightly different. Should I also order
the lower autorotation tail drive gear? Is it a slightly different diameter also?

The autorotation gear is the same size, its the pinion with the umbrella gear on it that has changed size (gotten larger).

[flerpie]

Thx. I'll look at getting the umbrella gear setup too when I install the slant
gear in my I2 TT setup. Thx. For my I2 belt setup nothing will change...kool.

[billiano]

Originally Posted by Jotto

I'm running my 500 on 2500 RPM. According to MrMel's headspeed calculator, the optimal governed headspeed is:

For + performance, keep req. RPM below: 2730
For target performance, keep req. RPM below: 2839
For - performance, keep req. RPM below: 2921

So 2500 will probably give a sub-optimal efficiency.

Sorry we are talking about a helicopter or a spaceshuttle?

With 2800 rpm ....I 'll go to the near field..