Geoduck belt drive

[jetnoise]

I am building a engine cowling for my Geoduck dose anyone have pictures of the timing belt propeller drive for a single engine geoduck

[AJW]

Do you have the plans for the craft?

[jetnoise]

2 sets and set of surveyor plans.

[jetnoise]

yes 2 sets I bought plans in 2000 then received a set when a bought a unstarted geoduck off ebay. they both only show only the v-belt. one of the benefits of a cam belt is the pulley can be smaller and thus less weight for the same hp.

[AJW]

I'm using the Geoduck carbon belt drive set up idea on my 16' X 7.5' Surveyor coupled to the 76" carbon prop Bryan makes now. I haven't started it yet as I'm waiting for my bits to cross the Atlantic. I will be able to supply pictures in a few weeks once I have built the thrust drive but not sure if it will be exactly the same as I'm using a Kohler 40 for my power unit.

Bryan at Amphibious Marine is supplying all my bits so he would be the best person to talk to.

[jetnoise]

Thanks AWJ. Are the pulleys smaller than the v-belt pulleys? I didn't think you could run a flat belt through a 90 degree bend how does it get the power from a vertical shaft to the prop pulley? I will be looking forward to see the pictures . 40 hp I don't think I've seen a super surveyor. please post some videos when you take it out.

[AJW]

Pulleys are a lot lighter as top pulley is anodised aluminium, not sure on size or weight difference, as I'm still waiting for them. The toothed belt doesn't go through a 90* turn on this set up, although Bryan has managed to do that with the carbon 90 drive used on the AM 14.

Once I've built my thrust & lift frame I will post pictures, but I wont be giving drive ratios away as that wont be fair on Bryan, who has done all the work in making this system a viable alternative to the V belt drive.

[jetnoise]

Thanks I found a picture of the drive that will help me design my engine cowling. But I'm always ready to see another hovercraft.

[jchovernut]

There's a fella in PA that has a 1.3 Geo on his Super^2 Surveyor (highly modified Surveyor), but it is a twin-engine & has the Gates PolyChain drive on the thrust in lieu of the multi-band v-belt driving Bryan's carbon prop.
Here's a link to a web gallery of that SEV. Note that it's highly modified!!
Surveyor^2

[AJW]

Any idea of what hp the lift motor is? I toyed with putting a 22hp kohler on mine for lift & the kohler 40 for thrust, but when I looked at the weight that would be sat on the rear deck, I quickly changed my mind.

Do you know what that Surveyor flew like?