Descending order of importance for increasing prop thrust (low speed vehicles)
more HP:-D
more prop diameter
more prop rpm
more blades
more pitch
Multi bld props can involve some thrust...
Type: Posts; User: TLL
Descending order of importance for increasing prop thrust (low speed vehicles)
more HP:-D
more prop diameter
more prop rpm
more blades
more pitch
Multi bld props can involve some thrust...
It's a rare event that one of these engines will quit running, slightly more likely one might not start for some reason:) I've used a lot of these on para-flyers..not bulletproof but ultra...
Experience tells me there's a bit of sweet spot concerning blade pitch for slow moving machines (paraflyers @30mph).
If one has selected HP and a reduction ratio, all that is left for practical...
Actually Subaru/Robin now has 2 versions of the big block engines on their web page (the engine formally sold as Generac). I just bought 2 of the 36hp models, they arrived with Subaru stickers. I've...
Do you use Cen clutch or one way bearings on the drive pulleys? Curious how you speed/power match the engines.
Once built a 5x10 flat bottom boat from 1/4" luan and 1x2 cedar strips..lots of glue and screws. covered the the bottom with cheap glued vinyl kitchen flooring from Menards. ran it as an airboat...
How about 2 sit-on Kayaks as toons?
Thanks for the detail, the design is simple..I like simple:)
Terry
On my DIY I found I didn't care for the way the hull handled with the air rudder. In sharp turns the boat would tend to lean to the outside and at times try to swamp over the rear outside corner. The...
Can ask the dimensions on the 'toon?
Terry
Nice..being from the north my airboat vision is an overpowered glade runner that can rip up water, weeds and dry beaches. My experience with a DIY mini airboat was more like 20 mph, no dry land...
I know very little about hulls and water craft, I know a lot about 4 stroke industrial engines, reduction drives & props. I fly with long-belt reductions using banded Vbelts (x style), I've sold...
Thanks. I'm sure there are lots of design caveats. Good advice saves newbs like me from reinventing the wheel..again:)
here's an engine I was fooling with..it'a a Briggs21hp vert shaft single with a twisted belt to horz prop drive. I tested and flew with this setup for awhile..no problems..not saleable to flying...
I'm really trying to learn more about airboat design. I've built a couple airboats by simply parking completed paraflyers on flat bottom hulls. Best performance with a 21hp single cyl Briggs was...
You give up a lot with short, flat pitched direct drive props (you probably know that). Also the UP prop is inefficient, partly because it's constant pitch from hub to tip (like a fan blade). I like...
Hi, I'm new here.
I build 4stroke Powered paragliders for living. Look at 'TERRY LUTKE' on Youtube. Someone suggested my reductions might be useful for air boats..any way just checking in
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