Hi there I thought I'd join in the fray here!
@ 36v I can achieve over 30mph on the 250w Torque Sensor (TS) only motor with my eyes closed! My record so far is 43MPH (Indicated). That was slightly down hill but I can't get that sort of speed on my own! When hooked up with a CA the motor is still drawing FULL current (around 17a for a 250w version) at those sorts of speeds.
@ 36v with a 500w TS only motor the record so far is 63KPH (around 40mph) on My Dads recumbent. I know it can go faster, but he's running on V-brakes and doesn't trust them to stop him!
@36v with 750w motor TH (throttle) only at Interbike this year we were getting 28-30mph all day long on a pretty tight demo track. This is all being acheived with our standard batteries. If you were able to use a pack that can sustain a constant 35a draw without too much sag you'll piss past 30mph. To get the best out of the 750w motor you're better off running with a 48v pack if you want the speed, again easily up to and over 30mph with no assistance from the rider.
As the video shows, using the Falco GUI interface, (20" wheel @ 48v) no-load speeds of 212kph (132.5mph) was acheived! If my Math is accurate, that is a no-load motor speed of 2035rpm. The main thing I have noticed with all the motors in the Falco line up is that, regardless of peak or nominal power, they are all still able to pull full current at any of the speeds that I have been able to ride at! I have NEVER been able to outrun a Falco motor! But as above, you can see why!
So the reason why the 750w can do the speeds quoted is that when you're doing 30mph you're still able to pull the peak 1.1 - 1.3kw of power from the battery! When I've played around with 3 phase builds in the past, I made a 48v 25a Puma motor powered Stingray that would easily pull 1.2kw from start, but by the time I was doing 23-25mph it was only able to draw a hundred watts or less to keep me going! So although, yes, at slow speeds it performs like most other 750w motors it performs like a 1kw (3 phase) motor at around 15-20mph and at 30mph or so it is still holding pace with an equivalent 1.3 - 1.5kw motor! Another characteristic that is lent to these motors is that hill climbs don't get effected as much as equivalent 3 phase motors!
Our 250w can punt you up some pretty steep hills either on the rear wheel if you want to go slow and showy or over the normal 15mph you'd be very lucky to achieve with a 3 phase 250w motor if you want to screw with some roadies
Although my favourite trick at bike shows is to go past roadies on the back wheel doing about 25 - 30mph.
I'm in the process of putting together a recumbent trike with a 750w motor with an AllCell 48v 20ah pack at the moment to see what it can really do! There is an aero body I'm hoping to try out on it too to see how much more can be achieved with less wind resistance! I should be putting up the thread today or tomorrow with some luck :-/
