RB5 motor position

[barry]

As stated in my other thread, I have an original 2wd RB5. I have noticed some other RB5s have the motor in front of the rear wheels - is this a home conversion? What advantage to having the motor right at the back does this give?

Cheers,
Barry

[canon67]

Yes they are convertion and they call them Mid cars.

Den.

[RogerM]

There are 3 to chose from;

MCS (FABs on here designed that one)
Scorpion (I designed this one)
Vega

As of today I don't believe (could be wrong) that there are any MCS available new, I'm not currently planning on doing another run of Scorpions so your choice would be the Vega which seems a very good car.

[barry]

Originally Posted by RogerM

There are 3 to chose from;

MCS (FABs on here designed that one)
Scorpion (I designed this one)
Vega

As of today I don't believe (could be wrong) that there are any MCS available new, I'm not currently planning on doing another run of Scorpions so your choice would be the Vega which seems a very good car.

Wow - so independently of Kyosho people on here have designed (and made?) these kits? Very impressive!

What's the difference between the them and what advantages does each one give over the standard?

Many thanks - this is very interesting.

Barry

[RogerM]

Now you are going to get a different answer from everybody as it will be a preference thing.

I will say that if I had of known about the VEGA project I'd probably not have done all the design work on Scorpion and due to their ability to sell more volume (by being part of Team Extreme) than the others you are more likely to find people with a VEGA to help with setups etc.

That said the MCS is still getting great results at the very top level and I am happy with my Scorpion!

[KinWild]

Does anyone know if you can use an old rb5 to build Vega conversion???

[barry]

Originally Posted by RogerM

Now you are going to get a different answer from everybody as it will be a preference thing

OK Roger, more generally, what advantage does moving the motor to in front of the wheels give?

Barry

[RogerM]

Basically it makes the car more responsive on high grip surfaces like astroturf and allows more natural rotation both of which make you faster around a lap.

That said on wet / slipper surfaces rear motor is normally much easier to drive.

The reasons for that are partially a more forward weight distribution (so more steering) and a lower polar moment of inertia (so easier to start / stop the rear coming around mid corner).

I hope that makes sense.

[reg]

Originally Posted by KinWild

Does anyone know if you can use an old rb5 to build Vega conversion???

it can be done,but im sure the car was designed around the sp onwords,you need other things to make it happen if you use the non sp,im sure some one will tell you exactly what you need

[barry]

Originally Posted by RogerM

Basically it makes the car more responsive on high grip surfaces like astroturf and allows more natural rotation both of which make you faster around a lap.

That said on wet / slipper surfaces rear motor is normally much easier to drive.

The reasons for that are partially a more forward weight distribution (so more steering) and a lower polar moment of inertia (so easier to start / stop the rear coming around mid corner).

I hope that makes sense.

Not sure about "lower polar moment of inertia"! :-)

Does your paragraph about the more forward weight distribution refer to the mid-mount position? I assume so, but it reads as though you mean the forward weight distribution is achieved with the rear motor position.

Thanks,
Barry

[le_sam]

there is the FT conversion kit too

a carbon kit usable with mid & rear motor.
the other difference is that you can change the balance with the battery position.

regards,