I did not mean to start another great debate. For me it is all very simple. 1. Any kind of pitch control will cost more money. 2. CPP is more...
Thank you keysdisease, I have been looking at the link you sent its full of info. If I'm not mistaken the the shift is made mechanically or...
OK I get it. Resistance goes up. Aircraft are different the air gets thin and the aircraft has less resistance to overcome.
I don't understand how resistance makes my reasoning fail. Dare I say a prop has no brain it does not know if it is in water or air.:confused:
Constant speed is not infinitely variable what I was trying to describe is a prop which lets say varies 25 degrees in pitch. you can adjust it in...
I discovered diesels can be reversed but they have to be retimed, what I managed to find on the net seem like more bother and perhaps expense than...
I read as much as I could and stopped reading about page six. I am a newcomer on this sight having much I want to learn about boats. BUT I DO KNOW...
I read as much as I could and stopped reading about page six. I am a new commer on this sight having much I want to learn about boats. BUT I DO...
This seems the most sensible idea I have come across with reverse done by a simple gear change. how is reverse achieved, I mean is the gearbox...
The pictures on site look like a car differential driving props instead of wheels , a great idea. The gearboxes might cost a bit but nothing like...
I honestly did not know that Tad roberts was designing boats like Passagemaker lite. On studying the drawings I thought they are very cleverly...
I didn't think of that. when I thought about the 27hp back up I thought scrap the shaft and prop fit a clutch and electric motor in front of the...
I know twin engined installations often have separate shafts and props. I know one big engine is cheaper than two small ones. I know two to six or...
Pictures as promised. My books don't agree, dimensions should be 72ft x 15ft x 4.6 to 5.5ft Motion comfort ratio is about 60 to 71 for 46 to...
Thank you for your replies gentlemen. The deck IS the gun deck my estimate of 2 tons for guns and ammo should really have been more like 4 tons....
I have been trying to learn a bit about boat design. I thought 1. A new design should be better than the boat it is intended to replace. 2....
Thank you I am interested in boats/ships of all types. I enjoy technical stuff. I thought I would write a set of wargames rules for WW2 coastal...
I can pick an aircraft weight then draw its dimensions then use fomula to predict wing/ fuselage weight etc whats left is available weight for...
Typo? Yes, I have worked out the Specific Fuel Consumption of some WW2 submarines to be about .4 lbs/hp/hr. it very much depends on the engine and...
DERF I know more about aircraft than boats but engines are engines. petrol engines use about 0.48lbs per hour per horsepower and diesels about...
