torque shift props
 

Does any run torque shift props on there boats ? The Land and Sea Co used to make a variable pitch prop not sure if there still around .

I knew a guy who used to run one on an outboard skiboat.
It worked pretty well for that application.

Their website http://www.land-and-sea.com
Looks like they sold the design:

Torque-Shift Props and Parts (Discontinued)
All our remaining service parts for the shifting prop line were recently sold to a third-party company. While this company is not affiliated with Land & Sea, we understand they plan to sell these components as well as manufacture some of the "no longer available" ones. Phone if you need more information.

i got on if you want it 50.00 bucks

We had them at Mercury for years. Called Power2

They were great for 20 something sport boats in the 40-60 mph ranges. Problems with the longevity though. Through hub exhaust seemed to expedite the failures.

The prop is no longer made and the service parts are almost extinct. I have 2 new shells in the shop. We stole the cam system out of them a few years back for some one else.

props
 

Did anyone ever try them on 38+ twin eng ?What did they do . Just curious. thanks Dan

They probably exploded.:party-smiley-004:
I had a demo video at one time from Land & Sea. Pretty cool concept, not good for much over 250 HP if I remember.

I used one years ago on a runabout with a V6. It was a maintenence nightmare and replacement parts were expensive. Oh, and it vibrated like mad, especially when one of the cams got hung up.
Cool concept....bad design implementation.

Do you still have this? I'd be interested...

Torque shift-
 

.....sent it back to Land and Sea in a box with all the springs hanging out of it after one run. It's supposed to handle up to 500HP if I remember correctly.

It couldn't take my SB Chevy on pump gas at under 4K RPM.

Another buddy tried one on his Wellcraft nova,and I was there when he did - and backing it out off the ramp as soon as he put the boat in reverse the blades opened up like the gills of a fish and knocked off the trim tab in 1/4 of a second- and bent a blade before we even got under way.

The product needs work- there is supposedly another shift-able prop on the market anybody....



Uncle Dave

Heres another product thats switches pitches-

http://www.aerostarmarine.com/runabouts.html

Its a 2 speed thing vs the land a sea "continuously variable" version....

Uncle Dave