Your video was more than good. I could follow everything. If you are going to have your own engine cases cast Please please consider making a bolt pattern on the face so those of us who are not worried about weight can bolt on a reduction drive for more RPM and more HP n torque. I know your motor can produce more power at higher RPM levels and I think having the option of a reduction drive would open the doors for other craft designs. I have in mind a WIG ( wing in ground effect ) craft that flies just above the water - no license and no restrictions as it is registered as a boat. Think about it there are some good redrives out there that make a good option.
Valley engineering guys in Rolla missouri tried everything they could think of to run a festive on a half vw and they all destroy the drive belts, and the European guys tear up rotax gearboxes on BMW twins. The power pulses on an opposed twin are huge and spaced out (or timed out that's a better word) such that they destroy any receive. A V twin like the Generac 990 doesn't do that. In a V the pulses are either too close or too far to produce resonance. I'm thinking a turbo is better: torque peak comes in lower in the Rev range.
@@myotherusername9224 I understand and thank you for the reply. I am guessing that rubber isolators are not enough. I think it has to be a fluid clutch which is more complications. What if the belt drive is tall over 1 meter with equal sign waves in your opinion do you think that would work ? I can have a high mounted prop and low motor.
I agree with the turbo install. I installed a turbo on a new Suzuki 1 liter Firefly 3 cylinder naturally asperated motor ( high compression)and the torque increase was incredibly noticeable .
Talked to you at 2018 Airventure. Been trying to get in contact with you. Building a Hummel Ultracruiser now. Ended up ordering a Hummel engine. Hope your still working on these nice to have alternatives. Please update us on your progress. Would be nice to know weights and ball park prices. Thanks. Brad
You mention it's a basic crank shaft and the gain comes from longer connecting rods. Unless your crank shaft throw is also lengthened a longer connecting rod will do nothing except put your piston farther away from the crank case. You also mention using a VW thrust bearing at the midpoint of the crankshaft which is now the rear of the engine. What bearing are you using at the front of the engine? That's where the horsepower is tapped from with a propeller. The original engine was designed for torsional loading of the crankshaft; not the same as the side loads it will get from a propeller trying to pull the crankshaft out of the front of the engine.
A question can the Javelin replace a 1/2 vw for pound for pound on Hummel bird ? The Hummel will be on floats and be registered as a WIG craft second division basically a boat so weight is not a problem. Can you give me a rough estimate cost of one of these motors with electronic controls and ele start ?
