Yeah, yeah, yeah, but without pictures and details of the installation, you aren't passing on any ideas to the young 'uns. :)
I suppose we answered the "diy-surface-drive" a long time ago as I am the only one who responded as having designed, built and drove one so far -...
You are, of course, correct. Since 2006, a dead battery replacement in a BMW required the services of a computer geek. In the late teens in the...
I think that for the most part "modern technology" is only an enhancement on old, basic good designs. For example there was a 12 cylinder W design...
Frosty, Is this the same engineering used in the calculation of loading they use on the ferries in Indonesia? Lotsa bodies floating in the ocean....
When I suggested flat bottom I meant only a couple of degrees of deadrise. I suspect that the "seats" are more of a cushion on the floor. The...
Good to "hear" from you, Frosty. I note that they are all flat bottomed so they can slide like an air boat, that the steering arc is quite small...
To calculate my SD system, I used a DOS program from Paul Kamen, a naval architect who worked for Arneson. He wrote an interesting article...
1. The drone engine (they were also used in the Bensen Gyrocopter) was a prop start 4 cylinder horizontally opposed engine was built by McCulloch....
Tom, I had a 2 cycle 4 cylinder drone engine (67 lbs - 72 HP) on a 12 ft rowboat. No flywheel - just the prop. Shook like it had tremors at idle....
Tom, I note also that the Hydro used a 3:1 overdrive which translated to a small diameter 12,000 RPM prop With a very small mass, If low speed 2...
Frosty, I don't think that a smooth drive (single diesel) is really on the mind of the operator. I also note that your boat has 4 bladed props....
Frosty, An 8 inch prop doesn't exactly transmit, say, 800 HP to the water. The larger the prop, harder the tip hits the water. I had a new 4 blade...
We don't have barnacles (fresh water) and I am 6 years retired from propulsion tech authority for Canadian navy and live on the Ottawa river. We...
Frosty, This is true (I have 2 props custom made for me in my garage) but it still does not address whether, say Arneson props are constant or...
1. "To every action there is always an equal and opposite reaction:" Isaac Newton. You can't negate this law. A prop blade grabs a handful of...
What I was getting at is this: 1. Props are divided up as a percentage of the radius. Eg. .1R, .2R, .3R, etc. to .975 R. (There is no prop to...
I have a question for those of you who have Surface Drives: Do you run constant pitch or variable pitch props? (By variable I do not mean...
Tom, Your comments are on the money. A quick review why surface drives are so good: 1. You want a ventilating prop because cavitation doesn't...
Rake only moves the thrust point further back from the stern and allows changes to trim to be more effective. V-drives, straight shaft drives and...
