~The Mark V has 850ft-lbs of torque at near 0 RPMs
Incredible as that sounds, remember that these engines are designed not to need a transmission. A 114 HP Volvo engine producing 136 ft-lbs will multiply that torque 13 times at the wheel in first gear, for a max of 1,809 ft-lbs (not that you need it), proceeding to the overdrive ratio 2.61, for 355 ft-lbs at the wheel. So the Mark V likely needs a final drive ratio of 1.5:1 or so.
I can't wait to hear the torque numbers on the Mark II.
~Mark V burner has a firing rate of 7 gallons per hour
This is an incredible amount of fuel, but remember that's top capacity. Meaning with a mediocre fuel economy of 20MPG, this burner can keep you supplied with steam up to 140 MPH with 100% duty cycle. When you add the reserve capacity of the boiler, there's room for even faster speeds, in short bursts. Also means that normally, duty cycle would be 25 – 50%.
Not so useful to us perhaps, but food for thought.
~The expected cost is “similar to a gasoline engine of the same horsepower”.
What does that mean? Who can say.
A gasoline 20hp engine costs anywhere from $1000 to $1500+ off the shelf.
~They have temporarily ceased work on the Mark II in favor of better funded projects.
Well, I just wish them some success, and hope they get their business firmly established.
Waiting is so hard.....