Using Air Motors

[knightrous]

Using Air Motors

Best spinner motors i reckon would have to be a Stihl 46.6cc chainsaw. Ive got one here but conning the ole man into giving it to me is like trying to run an Etek on a AAA battery.

[Guest]

Using Air Motors

But what about a methanol RC motor? The better ones might be a bit expensive nearing £200 or so, but there are motors for about £50 that weigh peak at about 400W or so.

Even the slowest of those motors are capable of reaching around 20000 RPM or so.

But the main advantage is that you dont need any battery for it, so a motor and fuel tank will weight about 300 gram (leaving more weight for the disc).

Ask your local hobby shop, see what they can dig out for you.

[mpinner]

Using Air Motors

The only thing about using a two stroke RC motor is that they have a habit of stalling, at least in my RC car anyway. What sometimes happens is air gets in to the fuel pipe (as the fuel sloshes around in the tank) and the engine stops.

Unless an electric starter, glow starter and maybe a slip clutch is used the engine could stall on the disc€™s first hit and then your out of the comp because your weapon in immobilised.

But I do like the initial idea though, just need to iron out those bugs.

[Guest]

Using Air Motors

The main saftey issue with running methonal R/C engines is that methanol burns clear. This means to safely run you need to put dye in the fuel so itll burn with a colour that could be seen. I know from building model planes theres nothing worse then starting a plane which then catches fire, because you dont know if the flames are over the carberator port for fuels lines. The only problem with dyes is they eventually degrade the engine, but I think life expectancy is a little consideration is this hobby.

[Guest]

Using Air Motors

What kind of fuel tank do you use in your car? I dont know about cars, but fuel tanks in planes have a small length of pipe with a wieght at the end so they can run even when upside down.

You may already have one of these, but I thought Ill mention it anyway.

I also know that Kyosho and some other brands sell complete sets with an engine, starter motor and glow starter. Just plug in a battery pack and the engine starts itself.

Of course youd need an extra channel to be able to this be remote control.

[mpinner]

Using Air Motors

The fuel tank in my car has baffles which are supposed to stop or limit the movement of the fuel in the tank; the small length of pipe in my fuel tank does not move even though it has a rather large metal filter at the end, there€™s just not enough room. I guess that it doesnt have to move as the car spends most of its time in the up right position and there is no need for it to operate upside down.

In fact when the car lands upside down (doing the mad jumps I do in it) the fuel leaks out the carburettor filter.

The fuel I use in my car has coloured dyes as standard, I use the illuminous yellow coloured fuel but for all you flamboyant ones out there a pink coloured fuel is out there too. The colours in the fuel also tell you the quantities of the oil to fuel ratio mixture you are using.

Depending on your application you can choose to use a throatier mixture (like yellow) or a more oiled cooler running mixture (like pink) as the engine gets its oil from the fuel.

I€™m sure you already knew all this but my point is RC car engines are designed to run on dyed fuels and shouldn€™t harm them if the correct fuel is used when the engine is run in on it.

The electric starter kits you saw; are they the nose prop starter kind or are they built in with the engine? I have not seen those, my engine is a pull starter.

[Guest]

Using Air Motors

Its basically a RS540 motor and gearbox built into the back of the motor, and a small glow starter on the top. Its designed for cars, so they should work fine.

[grant_ploughbot]

Using Air Motors

Is there really any point in the highspeed motors and engines everybody is talking about?
They just need gearing down alot anyway, meaning loosing weight for gear systems. Why not just buy a hefty low speed motor such as the EV warrior, or car fan motors. They can be placed directly onto discs, with all the grunt to get them upto speed in no time(Tantrum was run off a car fan motor and pimp2 off an EV warrior)
Much more simple and realiable than engines!!!

Grant-PloughBot-Team Rc Wars

[Guest]

Using Air Motors

You dont have to gear them. Faster motor equals a smaller disc, meaning less weight.

[sam_t]

Using Air Motors

it also means its one hell of a lot harder to get the disk to bite in, look at the trouble pimp 2 had at newark, the disk was moving so fast the big blunt teeth kept skimming off the opponents. fast disks are also harder to balance.

[cavecrusher]

Using Air Motors

No, he kept skimming off the opponents, because they were armoured with 10mm Hardox

[Guest]

Using Air Motors

That thickness in a featherweight?

[cavecrusher]

Using Air Motors

Jep

[Guest]

Using Air Motors

What grade then?

[cavecrusher]

Using Air Motors

500