Dragon Technology gearbox conversion

[Karl]

electricDave has continued his development work on this, I've now fitted the latest prototype to "Voodoo" ;







As you can see, we're trying out a different motor due to concerns that the original Sinclair motor was struggling to cope with the extra heat.

[Retro Andy]

Won't the wet and dirt getting through the holes be an issue ?

Retro Andy.

[Karl]

Won't the wet and dirt getting through the holes be an issue ?

Retro Andy.

Some road grime getting through those cooling holes has to be a possibility, but hopefully some road testing will see if it is a problem or not. On balance, the extra cooling should out weigh any potential problems.

[Retro Andy]

You could always fit the cooling fan closer to the motor, looks to far away in the pictures 

Retro Andy.

[Jonny]

what motor is that? 

[techytype]

i think once sorted and happy, to protect against ingress perhaps the new motor could have a simple oversized sleeve fitted and a cooling fan fixed on the end to blow in cool air, or draw away the heat?

the fact a new motor has now been sourced will be some releif for the contiued viability of the C5 

Alan

[Karl]

It hasn't been tested on the road yet due to all the snow 

...might be best to hold off the celebrations until it's been put through its paces 

Looking forward to it though 

[frankev]

Me want to. just one will do.

[Lancealot]

Any idea when the gearbox conversion will be tested and idea for cost?

On the topic of the new motor with the holes i think Chas on one of his C5's had a panel which would solve the dirt issue.

thanks Lance

[frankev]

Sorry that I come back about these heat issues, with the original glued engine, I bought 4, 12 volts fans at a lokal electronics shop, original made to cool the processor in a computer. Square, 1.5 cm's thick and just as big as the engine. With a 24 volt engine I can put two of them in series or one of them on a 12volt version. They are just 2 pound each. Is this an adequate option? 

greetz

Frank

[coverman]

Its what I use, having made a duct out of PVC fabric from the fan held to the motor endcase with a large Jubilee clip

[ScubaChris]

Hoping todays test run of Voodoo's new 24v electrics is going well...
I'm sitting here like an expectant father 

C.

[Karl]

Hoping todays test run of Voodoo's new 24v electrics is going well...
I'm sitting here like an expectant father 

C.

Voodoo completed the Crawley run with no ill effects - to rider or itself 

First impressions are good, the motor conversion has more torque than normal but no real improvement in top speed. Power consumption was about the same so overall quite good.

Now chatting with ElectricDave about altering the gearing to get a few more mph...

[ScubaChris]

Sounds promising 
With the extra torque to spare I'm sure it could handle a bigger cog on the motor or a smaller one on the wheel without losing too much power.
Get that calculator out. 

C.

[Retro Andy]

Hummm, more speed ! 

Retro Andy.