It's all about torque at the rpm you want to turn your engine. A water wheel might make 10,000 lbf of torque but if it does it at only 1 rpm it's not going to do a lot of work. Torque is like peanut butter and rpm is like jelly. You have to have both to make a pbj. You can have a lot of power with a...

Rural King is my store of choice. Never had a bad experience with them and you can't beat their prices on anything.

He makes one post only and includes a link...

He should kill one with his bare hands and then come back and tell us about it.

if you're guiding i'd strongly suggest a 20' boat. my 18/8 would get crowded in a hurry if i had 4 guys running around without a clue as to what they're doing. Typically builders only add like 1-1.5k per linear foot so the cost difference isn't huge. As long as you're not wanting to run up hills a ...

sanshandaobojue wrote:... but the formula is same according to hydrodynamics...

Keep in mind that air is compressible. Water, not so much.

.... Chinese product hign quality product and low quality product to serve whe world markedt including africa and south asia. The quality depands on how much money you spend, and what standard followed. This is exactly correct. The Chinese can manufacture any quality you want. It depends on what yo...

Abrams M1 tank engine peak torque is 395 lb-ft. At peak hp torque is 275 lb-ft.

OneBFC wrote:
All your low rpm torque translates to is.....power available at that rpm.

Torque does ZERO work. Power does work. Power makes thrust.

And..... GA-BOOM!!!!

That's it in a nutshell.

I'm staying out of this one. I'd rather argue religion. I'll say only the prop has no idea if the prime mover is a chainsaw engine or a steam locomotive.

http://www.reformer.com/stories/airboat-maker-claims-drowning-death-was-due-to-overloaded-boat,276189

Be careful. Very careful.

Turbines spool up and down too slowly to be a good choice for a normal airboat. But here you go:

http://marineturbine.com/turbine-powered-airboats/

"There is a crack in the vac plugs on carb. "

She's running lean.

Please message me with your experience and opinions. Not public on the forum. Thanks, Jerry. Oh, can't post I get a message says too few characters so i will say going 632ci or bigger.

mojoe wrote:I would love to see the 200 mph rolling start vs top fuel dragster challenge!!

It would be fun to watch. If the drag race was 1,320 ft., it would take the 200 mph car 4.5 seconds to cover. Top Fuel cars were running under 4 seconds before the track was shortened.

Well, wife pushing back on the new build. She's probably right but what the hay. I don't care to go fast I just want to show my grandsons some fun. Have 3 aged 6 and under with a new one due next month.

I only met Ken once in person but I considered him a true friend. He flew helicopters in Vietnam and although he mentioned it a time or two he never bragged about it. A true hero in my book.

I'll miss you Buddy. Prayers for you and yours.

glades cat wrote:Again, outstanding work and progress. None of the incidentals go to waste, not even the cracked block. They will all serve as teaching points. You and your students bring hope in a time of perishing trade skills.
Kudos.

x2

Well I feel better now.

Maybe the spec is customized for a specific bidder. Happens all the time.

Non-Cert built to those specs were in the neighborhood of $10K ten years ago.

I run salt all the time and Alumitech built me an awesome boat. The 18' AGI hull rides incredible 3/4 deck over with a GM 376 FI 525hp. Runs dry no problem with a load and handles a heavy chop very well. 25 years airboating and 4 airboats later, I feel like a have the perfect combination for my nee...

I want the rankest horizontally opposed six-cylinder engine I can get. Don't care how much of what kind of fuel it burns except I don't want to have to mix stuff. Only requirement is being able to run in a couple of minutes. Rather not spray it but won't rule it out. Maybe twin-turbo either one on e...