Does anyone have any ideal how much torque is put on the spur gear's for the single and 2 speed tranny ? With what ever motor !

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How many pounds of presser is put on the gears, torque pounds per square inch, when the motor turns it will put out so much pounds per square inch on the gears that drive these nitro cars/trucks/truggy, and the bigger the motor the more pounds per square inch it will give. I just want a guestamation on how much pounds per square inch lets say on a VX.18 motor.

In physics, a torque (Ï„) is a vector that measures the tendency of a force to rotate an object about some axis [1]. The magnitude of a torque is defined as force times its lever arm [2]. Just as a force is a push or a pull, a torque can be thought of as a twist.

I don't know how you'd measure that. Spur gears are usually measured in teeth.

ok, i know what you want now, i have not idea, i have never heard anybody say a torque rating for an engine or rear wheels, only HP

The motor is rated at 2.1 bhp but I don't know the torque figures.
http://www.oztion.com.au/-3cc-Vertex...n/2810347.aspx

* Mugen MR28MO1a puts out 78 oz/in at 21,200 rpm
* OFNA force .28 has 45 oz/in at 23,400 rpm
* OS MAX-28XZ has 79 oz/in at 25,500 rpm
* Trinity Drake .21 has 61 oz/in at 25,800 rpm
* Jammin .12 has 15 oz/in at 20,500 rpm
* OS 21VZ-B has 58 oz/in at 26,100 rpm


using that as base torque numbers.. id say the .18 VX is about 23-25 oz/in.. Not really much torque at all. And to vairify.. You can stop a runaway engine by grabbing the flywheel stopping it pretty darn easy. Small 2 strokes really don't have much torque.



rpm

You really cant measure torque from the engine. There are wayyy too many variables. Flywheel size, clutch spring tension, clutch shoe size, ****ch shoe material, tuning, carb size, pipe and header combination, temperatures, clutch bell teeth size, gearing, tire size, truck weight etc... You can get manufacture ratings but this is on dyno with no load and most all are not accurate.

the principle of a dyno is to add load and see how much torgue an engine can produce and then hp is calculated instantly with the computer.. So a dyno torque rating is as accurate as your gonna get..

There are 2 different kinds dyno's . An engine Dyno does not put any load on the engine. It meaures pure torque and hp from the crank with no load. A car Dyno has the load of the car and this measures rear wheel hp and torque.