Monolithic polycarbonate on the bottom of the boat protected from the various destructions.
The special construction of scales allows the boat to overcome various obstacles in the water. I have a greater desire to find a worthy use of our technical and creative possibilities in your country. Location: Adelaide, South Australia That's a very handsome design and build, Anton. Location: Russia, Novosibirsk We also have different rescue airboat projects.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Lake Buggy Airboats provide Airboat Plans for mini airboats so you do not motivation to do it How to Design an Airboat because we show you How to Build an. Location: USA I don't know much about airboats, but generally a larger prop is more efficient. Location: South Florida USA That looks pretty freakin awesome, how fast did it go? I don't want to use a bigger propeller because I don't want to make one, or pay for what would probably be a microlight propeller. Some people on this forum go out of their way to help others so I should add that I may just make a whole new boat as some competitors think that it is now possible to make a planing boat powered by a couple of cordless drills. For a propulsion motor, would it be possible to use something that is already geared to the proper range, so that gear train losses are minimized from the down then up gearing? Originally Posted by Village_Idiot If you got really fancy, you could add a gearset and a derailleur (sp?) to spin the props up faster. Not sure about this, but for a start I would have to buy two more expensive props if I went ahead, also they would not turn any faster.

FWIW the air rudders and amas in the pictures were ditched in favour of a water rudder (Jeremy harris suggestion - it was much better) and steam bent PVC pipe amas to save about 6 to 8 Kg.
At the moment I am inclined to use two separate props simply because I have bought all the parts necessary to do it this way.
Counter-rotating inline props will also give you more thrust, if you can devise or find a drive system that would work. Variable-pitch props would also be an option, but I'm sure too expensive for your purposes.
Perhaps with a catamaran, you can use a large single prop mounted between the hulls with no ring, if the rules allow it. Originally Posted by alan craig probably about 6 knots, as the winner apparently did about 7kt powered by cordless tools. PORTA: What about using existing props on ONE shaft and ONE drive motor, to make a single propulsion, further away from side contact?
I've answered my own question, by doing what I should have done before starting this thread.
As far as I know a common polycarbonate is not resistant to abrasion, so you must have used some treated-surface version? Then I tried playing around with Javaprop to get results which geometrically matched my propellers but didn't get anywhere close.
I recently rebuilt Four Candles, my Cordless Canoe Challenge boat to have air propellers for this years race which took place June 2012. I had a great time before starting the build, daydreaming about all the different layouts I could use. Also an electric brake on the motor which stops the spinning in a couple of seconds, such as used with electric mowers?
I used javaprop to get some thrust figures for one prop driven at my best estimate of rpm, velocity and power, times by two as I have two props; then put in double the power (two drills) at my best guess for the new rpm.

Mini airboat Many people impressed with the simpleness and economy of their lowly boat wealthy person asked for airboat plans that leave carry 2 men and some. After the race I had so much cruising time available that it was clear that I wasn't pushing the drills very hard so I bought the parts to step up the prop speed relative to the drills. I even thought that an electric airboat, in the style of Decavitator but without foils would make a great eco-cruiser! All your comments make sense, I'm just trying to push the hull I have as far as possible for my own interest really; I'm thinking of a flat bottomed planing boat for next year.
The race is run quite close to the public at start and finish, also there is nothing between the propeller tips and other competitors without them. An intricate and redundant dead man switch that makes it impossible to start the prop could be used so you could eliminate the ring? Trouble is, I'm now wondering if it would be more or less efficient to have both drills driving one existing propeller.
Plenty of room for errors but a big enough number for me to make my decision - two propellers. Http Also Lapplander without the google figure hunt enveloping frame Dang google just loves them long links mini airboat plans. Before the race I had some discussions regarding safety and we came to the conclusion that the shrouds would be necessary to get through scrutineering, bearing in mind the proximity of the public and the general aversion to being sued.

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