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Johny
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Post by Johny »

EV2Go wrote: Is it just me or do other people think those really long handlebars look ridiculous and dicky?
Makes tight corners a bit of a challenge. How is that trike's motor cooled?

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EV2Go wrote:I would be aiming for a seat height around that of the picture you posted.
I expect it just the model your have drawn but I'd be having a slope on the section behind your seat or your back is going to be destroyed. Moving the seat back a bit would look better too.

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:?:
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Post by Johny »

They would have has a tailshaft to the gearbox which you don't have. Considering how much unsprung weight you have (motor, diff, axle housing, brakes, wheels), there is no easy comparison with your trike. I wondering now whether suspension on yours will behave itself.

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Post by woody »

Also, your weight (batteries) is high and well back, whereas they have their engines either light, or quite forward.

Also they are just cruising around, something I can't see you limiting yourself to.

A bit late in the game maybe, but can you make the trike longer and have the batteries in front of the motor? That way they'll be mostly suspended on the front wheel, and the fixed rear may work better.
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:?:
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:?:
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Post by Johny »

Yeah I realised that after I posted.

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Post by rhills »

EV2Go wrote:Image
One trivial detail that I'm sure you've got weighed off but thought I'd mention just in case: Which way do the cooling fans on the controller blow? Presumably they're blowing with the slipstream rather than against it?
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Post by rhills »

EV2Go wrote: I believe it blows down onto the fins but wouldn't really mattter as it would have quite a decent amount of passing air blowing on the controller fins.
Yes, and the only time they probably really make a difference would be when you're stopped and presumably the controller wouldn't be working that hard then anyway.

However, the efficiency fiend in me is distressed by the thought of those poor fans struggling vainly against a 100kph slipstream Image
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Post by seligtype3 »

Amazing project! Look forward to seeing the frame come together. My only experience of trikes is the pedal powered variety but from a physics point of view they do my head in.

Image

This is the second FWD tilt shift trike I've prototyped recently, the fact that it tilted made getting something that handled well a bit of a nightmare. The first generation had a death wobble in a straight line and while this one is better due to an improved caster angle, it still struggles down the straight. Cornering on the other hand is a dream, full lock at speed results in a controlled 'drift' sideways, too much fun. Have vaguely considered the idea of electrification but it's dangerous enough in traffic as it is.
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Post by EV2Go »

I considered making it tilt but with 235/45-17 tyres, 3.1:1 diff gears and a redline of 5300-5600 RPM, it was just a tad quick for it to steer in any direction it wants.

5300 RPM = 128.89 MPH or 207.43 KPH
5600 RPM = 136.18 MPH or 219.16 KPH

While it would improve cornering it would make it unstable at speeds. I have my bike to go fast around corners, I just want something fast in a straight line. Trikes aren't really designed for high speed cornering anyway.

I probably got a fraction over zealous in the power plant, but I subscribe to the theory that you can't have too much power only too little.

I work on the principal of constant evolution, so even I am not sure what the finished chassis is going to look like just yet. but hopefully I'm not too far off starting it.

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Post by 7circle »

Go Tilt, there's a way I'm sure.

The front wheel and rear axles don't need to tilt just the seat to keep the rider comfortable with the cornering G force.

A really FAT front tyre would look mean and keep traction with the road well.

Power-assist steering linkages can do all sort of fun things.
Just tell us your preferred seating position Racer or cruiser.

You could sit high to keep wheel base short or stretch it out to keep the riding position low.

The batteries would be good to keep with the tilting mass to provide a smoother ride holding the seat still with less road vibration.

The tilting axis is usually better with the rear lower than the front and +/- 30deg tilt may be enough.

Just need to imagine a gimble hanging from the front forks to the rear above the axle. Battery +/- link out the front and link to the Soliton and then back under onto the Kostov motor.

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Post by 7circle »

Can you imagine the Forks not tilting but the rider and steering tilting.
Would get much more complicated. But use a flat front wheel not a fat curved one.

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