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Old 03-08-2011, 11:25 AM
racing fan racing fan is offline
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old hydro-kart plans

i have found a reference and a pic to a old really cool hydroplane
known as the hydrokart i want to build it but it uses kart racing motors to go up to 50mph
where can i get plans
here is a link to the reference
http://dngoodchild.com/5299.htm
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Old 03-08-2011, 04:18 PM
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PAR PAR is online now
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Glen-L still has a few of these class racers available. www.glen-L.com
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Old 03-08-2011, 05:24 PM
SamSam SamSam is offline
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Quote:
Originally Posted by racing fan View Post
where can i get plans
here is a link to the reference
http://dngoodchild.com/5299.htm
On the link you supply, click on "home page", that's where you can get plans.
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Old 03-08-2011, 06:04 PM
racing fan racing fan is offline
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there are no hydrokarts on glen-I website and to my knowledge he has designed 4 hydroplane all of them lake racers not APBA spec ones
he is a good designer but he dosen't get much into hydros
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Old 03-08-2011, 06:17 PM
xj35s xj35s is offline
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Hydro Kart 8' plans. I'll try to add the page 1 of the 7 on that site. free to download. They have allot of good plans there...


http://www.muskokaseaflea.ca/staticw...d=61&Itemid=50

or the home page... http://www.muskokaseaflea.ca/
Attached Files
File Type: pdf page1.pdf (749.5 KB, 157 views)
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Old 03-08-2011, 06:31 PM
racing fan racing fan is offline
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ok thanks i found it now http://www.muskokaseaflea.ca/staticw...d=61&Itemid=50
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Old 03-09-2011, 02:12 PM
messabout messabout is offline
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I am skeptical of the 50 MPH claim. A typical kart engine (claimed 5 HP) can be boosted to twice that output as the kart racers do. The down side is that a racing kart engine goes for 12 to 15 hundred dollars. In stock form the little flat head engine will not have the guts to do much more than plane the boat and not even close to 50.
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Old 03-09-2011, 04:42 PM
racing fan racing fan is offline
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i know i feel the same way i have a couple hydros this is a bit lower quality than we race
it said two (6.5)hp not 5 hp but
replace 2 with 1 and make it a Briggs 20-25hp V-twin you got a fast little boat

or a 350cc air cooled scorpion snowmobile engine (38-40hp)
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Old 03-10-2011, 06:27 PM
xj35s xj35s is offline
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I had a bone stock 17 HP Briggs on a small dynamark lawn mower. Originally designed for a 7HP. I had 3.5" pulleys on the engine and trans. it would pull wheelies in 2nd gear from an idle, just open the throttle and up it went. It would run 55MPH flat out on the road. Averaged 35 to 40 MPH on the dirt oval. weight without driver was 250lbs.

My cousin raced a bigger mower with an 18HP opposed Briggs. The dual exhaust had a very real V8 sound. I really like this idea. I had a mini max with a 9hp outboard that was crazy. We put a 15HP on it and it stood up. Could not keep the front down, didn't work well at all !!!
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Old 03-14-2011, 05:34 PM
racing fan racing fan is offline
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well the mini most is not a hydroplane it is a monoplane there different
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Old 03-14-2011, 07:34 PM
xj35s xj35s is offline
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I know. I'm just making the point that too much engine can be a bad thing. I've seen hydros stand up, then sink....
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Old 03-14-2011, 08:00 PM
racing fan racing fan is offline
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me too thanks
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Old 03-14-2011, 08:15 PM
xj35s xj35s is offline
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I know diesel engines are heavy. But that being said, they have enormous amounts of torque too. There are some single cylinder diesels that are very affordable and not much heavier than your typical Briggs. With this much torque I think you could get some good pitch in the props and really scoot.


The specs are here...
http://www.surpluscenter.com/sort.as...s&keyword=NED1

Or maybe an old Harley Davidson v twin ? air cooled and wicked power to weight ratio...
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Old 03-15-2011, 07:47 PM
racing fan racing fan is offline
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but there is no rpm on one of those i could get a small 350 cc 2 cylinder 2 stroke and it weighs the same and a 5hp now a days is 148cc and add 1.5 hp you have 191 cc about for a 6.5hp motor add two of those up you have 382 cc total and a ton of weight so lower the cc's and use a 350cc motor high rpms and you still have more than 20ft pounds of torque total amount of torque 10 ft lbs each for a 6.5hp-grand total of 20 ft pounds of torque and way lower rpm 8000rpm compared to adding 1/4 the wight and only having 3600 rpm with the 6.5hp
a small snowmobile motor is the way to go air cooled too
you got to do a bit of math a diesel with 2800 rpm has about a third lees rpm of a small gas 4 stroke 6.5 hp and it has a bit more than a third more torque but it weighs more and not that easy to get parts for the small ones not impossible but not fun and a 350cc 2 stroke weighs less and has over double the rpm of the gas motor and less weight and more torque than 2 gas motors combine

Last edited by racing fan : 03-16-2011 at 07:23 PM. Reason: bad spelling
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