Anyone regeared a RAPTOR 50 with OS HYPER, how can I change

[jongurley]

Hey guys i have a question about the ratio on a raptor 50 ,, my 50 has the stock 10 pinion with 85 tooth spur/main gear,, I was wondering how or what I can do to change the gearing to 8.6 ish to 1 instead of 8.5, I have read were you can get the TITAN with optional ratio I don't know exactly what it is, I would think changing the ratio would put the engine at a slightly higher RPM therefore staying in the powerband alittle more,, ,,

I figured right now is a good time to try this,,,,
1st pic is why I can attempt this ratio change now.
2nd pic is my helicopter/airplane trailer security system.haha. :D

[BarracudaHockey]

The titan gear has a new gear and pinion, it will let you run the head at a slightly slower speed 1950 vice 2000 to get the engine at 17K, I have the gears but havent swapped them yet but I've heard pretty good things about it.

[jongurley]

Were can I get the gear set from,,, I have looked on Heliproz, which heliproz sucks for searching for something anyway,, and I didn't see it,, anywhere else online that DEFINITLY has them,,,,

[Gscott]

This is the part you want:

http://www4.mailordercentral.com/heliproz/prodinfo.asp?number=134485

It is a new delrin main gear and a new pinion. Looks like Heliproz is out of stock but you may want to try Rick's (www.ronlund.com) or www.onlyraptors.com.

[Skiddz]

Were can I get the gear set from,,, I have looked on Heliproz, which heliproz sucks for searching for something anyway,, and I didn't see it,, anywhere else online that DEFINITLY has them,,,,

Agreed. The front end on the site is looking better, but the way they "organize" their catalog is ridiculous. Try calling them. They probably have the goodies in stock.

[TerryBelanger]

Moved to Tunder Tiger Forum

[tashley]

cuda, indulge me if you will. How is it that going to a eleven tooth pinion from a ten slow the head speed down. In my motorcycle racing days to go slower with more torque you reduced the number of teeth on the c/s sprocket and increased the number on the wheel sprocket.

[HeliSat]

Tashley,

Both the pinion and gear are changed. The stock was 85/10, and the optional ratio is 96/11

[tashley]

I get it now. You're increasing the tooth count on the pinion by one and the main gear by eleven obviously by using a finer tooth pitch and in effect lowering the head speed at the same given engine rpm. Is the prime reason for this to be able to adjust engine rpm to a more desirable range?
I'm using this ratio on the Titan I have under construction now and for those who already have it, what main and tail rotor blade length are you running.

[BarracudaHockey]

600/95 on the titan or if you want 620s if you can find some. I'm waiting till I get some projects off my list and I'm going to put the gears in my V2 with 600 radix blades.

[HelicopterJohn]

I see they offer this as a kit with both the delrin 96 tooth gear and the 11 tooth pinion.

Does anyone know if the individual part numbers on these in case you want the individual parts?

:D

[HeliSat]

Not sure. I looked around the online stores and only found the combo.

[Rocket Man]

I just checked Heliproz and they have the gearset in stock. Just search on "PV0518" on the home page and it pops right up. I haven't seen any individual parts numbers yet. Maybe TT is worried that somebody will try to mix and match with the old coarse pitch gears.

I changed both of my Raptor 50s and they run much better now. I have my governors set for a 1900 head speed and that works fine for me.

I hope TT makes this gear set the standard equipment. :)

Ron

[HelicopterJohn]

Rocket Man,

The reason I ask about individual parts that in case of a crash sometimes it wipes out the main gear and it it nice to be able to buy just the main gear and not the whole setup. The steel pinion rarely is an issue unless the bearing slips on the hub and ruins it.

And with the new gear having 96 teeth instead of 85 they would not be as thick as the old gear and would "probably" strip easier in a crash.

[Aviation addict]

I have a V2 (600mm blades) with the standard 8.5 ratio but would consider changing to 96/11 if it were worth doing.

The Hyper manual puts the power rating at 17,000 rpm but what's the ideal engine rpm to set your machine up to run at? Should you set say 16,500 to save your engine - or I've heard of putting yourself at say 17,150 to put yourself above the max power and dip down into it when working the machine hard?

For those that have done it, what difference do you notice from going from 8.5 to 8.72? Is there less bogging during harsh manouvres?

[HeliSat]

Very true.

I had a look at the rappy last night, correct me if i am wrong, but it doesn't appear that you can adjust the gear meshing.

[HeliSat]

Aviation,

I have been told to have the rpm slightly higher than the peak rpm. This way when you load the head it will come down to the peak range. Weather that work in the real world, i am not sure. I have the 96/11 on order so will give it a go.

[Aviation addict]

Yep. I'm a sucker for new things, so I think I'll get the new ratio on order too!

[HeliSat]

i cant wait - I also have a couple new 6965 servos on order as well. I had an issue that had been causing me heaps of grief with pitch. Turned out that I had a KO servo on pitch, that was 6V only (from my days of onroad racing). Worked ok on the ground but must have been too weak to perform in-flight. It felt like I was flying with only 5degs, but each time I checked with the pitch guage I would get +/-10. Even when I moved to 11 degs and 2000 rpm, still had nothing (and the head wasn't loading either).

I cant wait till my order arrives!! I also have a Kasama head on it way too.

[Rodan]

I'm also interested in hearing how the gears work out for those who have changed them.

My 50 V2 is going in a scale body, and I would really like to get the headspeed down but be able to keep the engine in it's "sweet spot". Does anyone know if there are aftermarket gears with an even higher ratio? Say ~ 9:1?

I think I'll be picking up a set of these to try if I can't find anything else...

[Rocket Man]

Rocket Man,

The reason I ask about individual parts that in case of a crash sometimes it wipes out the main gear and it it nice to be able to buy just the main gear and not the whole setup. The steel pinion rarely is an issue unless the bearing slips on the hub and ruins it.

And with the new gear having 96 teeth instead of 85 they would not be as thick as the old gear and would "probably" strip easier in a crash.


I agree completely. I just haven't seen the gear listed separately yet. TT is asking a pretty penny for these gears and I doubt if I want a "free pinion" with every main gear.

The new gearset does have a finer pitch (since there is no way to adjust the gear lash, this is probably way too obvious for everyone), so it may be more vulnerable. It looks like it is made out of a different type of nylon as well, so maybe it's stronger.

I'll find out as soon as the weather warms up around here and I splash one in. :lol: :lol:

Ron

[HelicopterJohn]

Hi Rocket Man,

Boy, I know what you mean "whein it warms up". You guys up North are really getting pounded by the cold weather.

Hope is warms up soon so all you guys can really start enjoying your hobby again.

I "think" the new gear looks like it might be delrin which should improve the strength or the plastic version TT currently supplies.

:)

[BarracudaHockey]

Rodan if you are flying a scale body you dont need the hyper in its "sweet spot" but to answer your question yes, they are even made by TT, its the Raptor 30 gear set.

[Rodan]

So the Raptor 30 gearsets will bolt into the 50 V2?

Tail gearing should stay the same, since I'm not really looking to change headspeed, correct?

[Rocket Man]

The Raptor 30 gearset will drop right in. It's a 9/86 (9.56:1). Personally, I think that's a little extreme for the 50, but it's not my heli. :dontknow

The tail pulleys are the same for both models, so you couldn't change that anyway.

Good luck. Let us know how it works out. I'm planning to put one of my Raptor 50s into a Hughes 500 fuselage - but I will stick with the new gears.

Ron