Raptor 30 & Revlock 10 ratio setting

[LipolyGone]

Just fitted my revlock 10 to my os37 engine & started reading the setup instructions. It states a ratio of 8.5 to 1 for a raptor 50 but doesnt list what it should be for a raptor 30 which I'm setting up now or a 60 which I will be setting up soon.
Am I right in making the assumption that if the R50 is 8.5 to 1 with a 85 tooth main then a R30 by default should be 8.6 to 1 as it has a 86 tooth main or am I just being stupid
Ta in advance
Martin

[Nutz]

30 Ratio is 9.56:1 Meaning the engine will run quicker to get the headspeed than 8.5:1 ratio

The ratio will change depend on both the main gear and pinion size.

I would set it buy engine speed rather than headspeed but it depends what blades you are running as wooden blades cannot handle as high a heaspseed compared to fibre glass or carbon fibre.

[LipolyGone]

Ta Nutz I'm using a pair of ripmax white glass blades so they should stand up to 2100 ish in idle up 2

[Nutz]

Use this to work it out
http://www.rcuniverse.com/community/heliwizard.cfm

86 main gear
9 Pinion
If you can get 20,000RPM out the engine you will get a headspeed of 2093RPM.

I suggest you find were the peak power of the engine is the OS site for an OS engine is peak power @ 17,000 for a 32 or 18,000 for a 37, both engines rev until around 21,000

So for example if you have an OS37 set the engine speed for around 18,500/18,750 the headspeed will be 1936 to 1962.

Then fine tune the head speed to 1950

[Jamez]

Just out of interest, do you tacho the engine to get it running at 17000, as our optical tach wont read that high!!, or do you just take the head then backward calculate to get the engine speed.

[Nutz]

You can select the 17K on the RevLock and the fine tune it through the aux ch to add 1,750RPM. This will give the govenor a total of 17,000RPM + 1,750RPM = 18,750RPM which the govener will try to maintain. If you tach the headspeed it should read around 1962, you can then fine tune it through the govener aux ch to 1950 or leave it where it is.

This is all based on calculations so as long as the gearing is a 9.56:1 is should be correct.

[Ade_Law]

Im not sure but i thought the 30 is 8.9ish?

[Nutz]

I was just going buy Thunder Tigers web site

http://61.221.10.43/english/products/raptor/raptor.htm

[LipolyGone]

Geez zuz christ thats long winded!
Just finished trying to set up my revlock 10
Now I think I've sussed it but how it's setup means it is active in hover mode.
The multiplex philosophy is
Hover = idle up 1
Cruise = idle up 2
3d = idle up 3

The revlock only allows A & B via the remote lead from what I have read correct me if I'm wrong.

So my curves for Hover mode are 0 25 50 75 100
cruise 40 50 60 75 100
3D 100 75 50 75 100
That means in hover the governor will become active after point 1 is reached.
In cruise it will allways be on & in 3D it will allways be on
Now for whats flumoxing me.
in hover mode Mode B is on in cruise Mode B is on & in 3D Mode A is on

Ive set it up to give a HS of 2000 rpm in 3d 1800rpm in cruise & 1700 in hover mode does that seem right?

[Nutz]

I normally run just one headspeed.

With your set up there is 2 ways of doing this

1st: Run only 2 headspeeds with the governor (mode A & B)

2nd: Run 3 headspeeds, 2 of the headspeeds will be off of the throttle curves disabling one of the governor modes (A or B) and the 3rd head speed with be with the governor

[LipolyGone]

Been putting my 30 back together & have another question what is the safest head speed to run on it with glass ripmax blades but plastic mast & blade holders?

[Ade_Law]

OS website states 18000rpm on the engine, divide by gear ratio and add a 50rpm on the headspeed

and bob is your dads brother.

Ade

[Fixxxer]

Ta Nutz I'm using a pair of ripmax white glass blades so they should stand up to 2100 ish in idle up 2

Did you get those ripmax blades recently, if so where ? I have only managed to lay my hands on 1 pair and think they were damn good for the money.

[LipolyGone]

Sorry Disc mate I got them when I got the heli.
The Perkins ones I have on my 600E are just as nice if not identical & cost me about £34 from the shop in whitchurch bristol.

[LipolyGone]

OS website states 18000rpm on the engine, divide by gear ratio and add a 50rpm on the headspeed

and bob is your dads brother.

Ade

So were saying 1932 is the max RPM of the blades to be on the safe side Ade?
18000 engine RPM divided by ratio of 9.56:1 + 50 rpm = 1932.8rpm.
I was going to set hover mode on curves only for landing etc
& idle up 1 & 2 to 1950RPM but if 1932 is as fast as they will go then that will be fine.