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ProModeler Scorpion Power
OuttaControl

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Springfield, Missouri -United states

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Anyone have a 13T /14T Raptor 90 pinion gear they could part with? I converted my 90 to a LHS bird but my headspeed is alittle too low. I need to get a couple hundred rpm more.

Mine fall down, went BOOM!!

12-05-2016 03:40 PM
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ticedoff8

Key Veteran

Morgan Hill, CA. USA

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Good luck with that.

I sold all my R90 stuff to a guy in Texas about 4 years ago.
He got my whole collection of main & pinion gears.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

12-05-2016 07:37 PM
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John Benario

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Las Vegas

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I have the double speedup tail gears that I made for Gary Wright's low RPM models.

Team highest quality
Futaba radios
Cool Power fuel
John's Ultimate building school

12-06-2016 05:11 AM
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OuttaControl

Veteran

Springfield, Missouri -United states

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Pinion

Surely somebody has just one.....

Mine fall down, went BOOM!!

12-06-2016 01:55 PM
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Richardmid1

rrProfessor

Leeds, England

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Could you up the cell count instead or are you already on 12s?

Is it just a Mod 1 straight cut pinion your after?

60% of the time, it works every time!

12-06-2016 03:33 PM
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don s

Key Veteran

Chesapeake, VA

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It's a nitro bro.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

12-06-2016 03:51 PM
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Richardmid1

rrProfessor

Leeds, England

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Low head speed on a nitro?!

60% of the time, it works every time!

12-06-2016 03:58 PM
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OuttaControl

Veteran

Springfield, Missouri -United states

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Pinion

It's not a nitro. I converted it to electric. And yes it's a straight tooth gear. I think it's mod 1.

Mine fall down, went BOOM!!

12-06-2016 04:58 PM
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don s

Key Veteran

Chesapeake, VA

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Doh! My bad.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

12-06-2016 05:25 PM
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Richardmid1

rrProfessor

Leeds, England

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Is it a 6s setup?

60% of the time, it works every time!

12-06-2016 05:30 PM
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John Benario

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Las Vegas

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For everyone's info, I made a high ratio drive for Carey Shurley's gasoline Rapter. He was doing the same thing, trying to up the engine speed, while lowering the head speed since gas engines run much lower RPM than nitro.

Team highest quality
Futaba radios
Cool Power fuel
John's Ultimate building school

12-06-2016 05:33 PM
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OuttaControl

Veteran

Springfield, Missouri -United states

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Pinion

Yes it's a 6s setup. I need a 13 or 14T pinion to get the headspeed up

Mine fall down, went BOOM!!

12-06-2016 06:02 PM
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OuttaControl

Veteran

Springfield, Missouri -United states

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Pinion

I can only get around 1300 rpm with the gov. Just need to bump it up to mid 1500's.

Mine fall down, went BOOM!!

12-06-2016 06:05 PM
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Richardmid1

rrProfessor

Leeds, England

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Could you just use a 7s pack?

60% of the time, it works every time!

12-06-2016 06:13 PM
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OuttaControl

Veteran

Springfield, Missouri -United states

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7s

I would try it if I had one......

Mine fall down, went BOOM!!

12-06-2016 06:14 PM
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Richardmid1

rrProfessor

Leeds, England

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I've just found a 15t in my 'box of bits' if it's any use?

What KV is your motor?

60% of the time, it works every time!

12-07-2016 10:10 AM
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OuttaControl

Veteran

Springfield, Missouri -United states

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15T

My motors kv is 500. That 15T would give me 1790 with my 6s lipos. If you can part with it I'll try it. It'll give me plenty of headroom on my esc.

Mine fall down, went BOOM!!

12-07-2016 01:27 PM
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gwright

Veteran

Champaign Il

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John, that's an old raptor 90, not a G4 version like I flew, and Carey flew with the GT15 gasser.

What is the maingear toothcount that the 15T will mate with?

1790 on 6s in a 700 is going to be very innefficient. probably get pretty hot on the components. 1000 to 1200 should be a reasonable expectation. Going higher in revs, the power required goes up exponentially. for example, the power required to turn 1800 is close to 3 times the power required to turn 1000.

In your example, going from 1300 to 1500 requires 24% more power.

Gary Wright
Futaba
Flightpower
Prod manager at Hobbico

12-07-2016 03:52 PM
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Richardmid1

rrProfessor

Leeds, England

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I kind of agree. 1300 should be fine.

60% of the time, it works every time!

12-07-2016 04:07 PM
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OuttaControl

Veteran

Springfield, Missouri -United states

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Headspeed

Gary I'm just trying to get the headspeed to around 1500 at full throttle so I don't have to run my esc at 100%.

Mine fall down, went BOOM!!

12-08-2016 05:50 PM
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