Custom made volkswagon powered 8x8 with sea doo pump

[chris davison]

Kelvin the math of fixed hull speed says 8 mph at best considering hull length and boyancy at the water line and HP. Not to mention 8 tires dragging in the water. but that is twice the speed gained by swimming tires.

[kelvin]

sounds great carnt wait to see it in the river up on plane then screeming up the river bank

[chris davison]

Finally a saturday off. I went to Auto zone and picked up one caliper for a 92 cadillack Alantra and installed it, hooked up my steering for the pump and adjusted it all. Cant see what its doing so I had the wife film it so I could watch what it does. It looks great for the first attempt I have to finalize it by welding the bracket in place just clamps for now. Then played my Taylor 914 ce for about three hrs. of relaxation in the workshop it was a good day.

[Bw6]

Bw6 I must have a lot of endurance. In the last year I"ve finished several schools worked several 12hr a day weeks and 70% of work weeks are 6 days, bought 2 guitars and one amp and read completly thru the Bible 1.5 times. Not to mention practising to play in church on Sundays. No wonder Walley is coming along so slow.

Hi Chris, You should bottle that and sell it, then you would have plenty of time to finish Walley. Seriously though watch for signs of burn out. That sure is a hectic pace. Nice hearing from you.

[chris davison]

Bw6 I must have a lot of endurance. In the last year I"ve finished several schools worked several 12hr a day weeks and 70% of work weeks are 6 days, bought 2 guitars and one amp and read completly thru the Bible 1.5 times. Not to mention practising to play in church on Sundays. No wonder Walley is coming along so slow.

[chris davison]

Funny how we think alike before I read the posts today I went into the workshop and found 2 compression springs 1 1/8" long they fit into 1/2" conduit perfectly so I cut a piece 4" long and welded a washer on one end put in one spring and fed the cable into the washer end as the cable came out I fabbed a loc ring that snaps onto the locking slot on the cable as the cable slid back into the conduit the lock ring was captured and couldnt fall off then I added the other spring and put 2 cotter keys thru the end of the conduit to keep the springs from falling out. Welded on a bracket and I'm ready to install. Now when the travel bottoms out on the cable the spring will compress moving the cable sheath 1" in either direction more.

[mudbug3]

Bw6

All exellent ideas.

[JoeMeg]

Hi Chris, I've been following your progress over the years, your sure have endurance, lol. Ok here are a few ideas for the steering. First what if you install an extension spring inline on your cables one for each side. Then when the steering cable bottoms out the extension spring will allow travel until your brakes are fully locked. Your aluminum screen door probably has a similar setup. Another idea is to separate the pump nozzle steering from the brakes, but it means 2 "rudder" pedals and aircraft cabling. The third idea is use 12v linear actuators for steering, with paddle mounts on your steering yoke, activated via micro switches.

Right on Bw6. That's what I would suggest. Use springs in your linkages to allow for over travel.

Joe.

[Bw6]

Finally finished my week of 12 hr days at work. I hooked up my steering cable to the pump nozzel but am having trouble figuring out how to hook it to the steering because of unequal travel needed for the brakes and the pump steering. If I turn hard to the left my pump steering will bottom out before I get enough travel to lock up the brakes. Also I noticed the left caliper has fluid leak so I need to fix it first and then figure out a spring loaded contraption for the pump steering. Also I signed up for advanced hydraulics class It deals with pumps motors and circuits with accumulators. I finished my class on advanced CNC programming so I can go to another.

Hi Chris, I've been following your progress over the years, your sure have endurance, lol. Ok here are a few ideas for the steering. First what if you install an extension spring inline on your cables one for each side. Then when the steering cable bottoms out the extension spring will allow travel until your brakes are fully locked. Your aluminum screen door probably has a similar setup. Another idea is to separate the pump nozzle steering from the brakes, but it means 2 "rudder" pedals and aircraft cabling. The third idea is use 12v linear actuators for steering, with paddle mounts on your steering yoke, activated via micro switches.

[chris davison]

Finally finished my week of 12 hr days at work. I hooked up my steering cable to the pump nozzel but am having trouble figuring out how to hook it to the steering because of unequal travel needed for the brakes and the pump steering. If I turn hard to the left my pump steering will bottom out before I get enough travel to lock up the brakes. Also I noticed the left caliper has fluid leak so I need to fix it first and then figure out a spring loaded contraption for the pump steering. Also I signed up for advanced hydraulics class It deals with pumps motors and circuits with accumulators. I finished my class on advanced CNC programming so I can go to another.

[chris davison]

Kelvin I have a good friend named Adam who has a heavy english accent people always ask him" what part of australia are you from" He always tells them with a smile "London"

[chris davison]

There is a #60 15 tooth on the trans stub shaft and a 30 tooth on the jack shaft. At the other end of the jack shaft is two #80 15 tooth sprockets each one drives two axles on one side. I left enough room to change from the 30 tooth to a 45 tooth if I want to. all shafts are 1 3/8" so all brgs are cast iron pillow blocks or 4 bolt flange brgs. so they all take the same insert.

[kelvin]

is their only a 2 to 1 reduction on waley or is their one off the jack shaft to the axels aswell

[kelvin]

i have a reduction of 2.5/1 which was suposed to half the speed but i am thinking of putting a jack shaft in to half it again but i will keep testing as is and see what will really bog down the motor and what wont

[chris davison]

Hi Kelvin Yes it takes a little more power to turn so when I turn I give it gas. one side will lock up while the other now goes twice as fast. I think my videos are on pages 9,10 & 11 of this post. There is one cruising around the barn in first gear. dont forget you should have a jack shaft with a 2/1 reduction so you will have 1/2 the speed and twice the torq. to the wheels.