Search found 147 matches

by WaterWalker
Sat Mar 17, 2012 5:52 pm
Forum: Airboat Talk
Topic: Next NEW big idea
Replies: 9
Views: 1324

Re: Next NEW big idea

Well anyone who really researches props will come to the conclusion that they have come about as far as they are going to. The exception being one company's patent on the adjustable on the fly system for airboats ... and David Wines prototype of a system that Plumcrazy is driving around. Kudos to b...
by WaterWalker
Sun Mar 11, 2012 2:21 pm
Forum: Airboat Tech
Topic: how to adjust a powershift
Replies: 3
Views: 572

Re: how to adjust a powershift

have a 70 inch power shift prop on my boat it only turns 2650 want to turn about 2900 but never adjusted a carbon prop always had stick prop pretty self explanatory just double checking for myself before i go with it. does the leading edge go away from or towards the boat? I suggest: Assuming that ...
by WaterWalker
Fri Mar 02, 2012 7:57 pm
Forum: Hunting & Fishing
Topic: warning to huntin bigun
Replies: 28
Views: 2766

Re: warning to huntin bigun

Huntin, where you going. I spent 6 months in Zambia working for a PH, had what I was told close to 500,000 acres. It took 4 hours to get from 1 camp to another , and thats with asphalt. When you got off the pavement, it 18km to camp after driving 30 min on pavement. What a experience! Back in 87. W...
by WaterWalker
Mon Feb 27, 2012 10:18 am
Forum: Airboat Tech
Topic: Flow straightener
Replies: 54
Views: 4120

Re: Flow straightener

Mr. Wine, Have you experimented with backward-curved airfoil impellers? They tend to be quieter than conventional designs. Thank you sir. Glades Cat: Not sure of your term "Backward-Curved airfoil impellers" For instance "Reverse Scimitar "? Impellers to me imply turbine blade s...
by WaterWalker
Sun Feb 26, 2012 8:20 pm
Forum: Airboat Tech
Topic: Flow straightener
Replies: 54
Views: 4120

Re: Flow straightener

Cntry & Andrew McD: I am very much with Glades Cat in my postulating that airboats now and in the future should be tough, non-complex and great basic fun with what we call performance. Chase hogs through the palmettos, pivot to gig a frog and run Gardner's Marsh, wet or dry. In the future though...
by WaterWalker
Sun Feb 26, 2012 4:42 pm
Forum: Airboat Talk
Topic: CMB at the Freedom Ride
Replies: 51
Views: 3784

Re: CMB at the Freedom Ride

HuntingBigun: My runway is 3200 feet long. I can "run dry" very well down the whole length of it. I took it to Sun-N-Fun the first year after building it about 6 or 7 years ago and it made the whole front page of their daily newspaper. It was also featured in some aviation magazines from t...
by WaterWalker
Sun Feb 26, 2012 4:10 pm
Forum: Airboat Talk
Topic: CMB at the Freedom Ride
Replies: 51
Views: 3784

Re: CMB at the Freedom Ride

flying fish: Yes, I built it, its a homebuilt experimental (not an ultra-light) 40' wingspan. Two Rotax 912-S with 2.7/1 ratio gearboxes. Takeoff roll as short as 100' Short field landing same 100' stall about 40 MPH climb both engines 1000 feet per minute. climb one engine about 250 FPM. If interes...
by WaterWalker
Sun Feb 26, 2012 2:58 pm
Forum: Airboat Talk
Topic: CMB at the Freedom Ride
Replies: 51
Views: 3784

Re: CMB at the Freedom Ride

Well I thought maybe I was riding the newbie a little hard so I wanted to give him a true SA welcome and make him feel like he is one of us, so I grabbed a couple of Nomads pics from the freedom ride engoy See he has a friends after all http://www.southernairboat.com/photopost/data/500/medium/CMB_h...
by WaterWalker
Sat Feb 25, 2012 12:31 pm
Forum: Airboat Tech
Topic: Flow straightener
Replies: 54
Views: 4120

Re: Flow straightener

Tell us more cntry, whats it for? any details? thanks! BTW, I had to revise a drawing I put up in an old post. For some reason the flow straightener rendered clear.... but I'll fix that. I doubt the dimensions were correct anyways. http://www.southernairboat.com/photopost/data/500/medium/Untitled-1...
by WaterWalker
Tue Feb 21, 2012 6:40 pm
Forum: Airboat Tech
Topic: Waterwalker concept boat testing
Replies: 40
Views: 4464

Re: Waterwalker concept boat testing

Andrew McD:
Forgot to add that the turning chines are raised smartly to make it a good "sliding hull". Again see the picture above.
David
by WaterWalker
Tue Feb 21, 2012 6:16 pm
Forum: Airboat Tech
Topic: Waterwalker concept boat testing
Replies: 40
Views: 4464

Re: Waterwalker concept boat testing

hey Plum, Thanks for the informative post. Definitely jealous of you, Dave, and that boat! Just curious, does the air assist step pick up a lot of crud?I can see going straight and sliding a little without issues but have you had the chance to do any doughnuts or fast maneuvering in low marsh? My c...
by WaterWalker
Tue Feb 21, 2012 1:00 pm
Forum: Airboat Talk
Topic: 8'x18' MMCP from Midwest Rescue Airboats
Replies: 28
Views: 2828

Re: 8'x18' MMCP from Midwest Rescue Airboats

Cathy & Matt:

Great boat for great purpose. Good to see you sharing pictures and facts to show airboats can do great things.

For other readers, I had the pleasure of seeing one of these boats at their factory recently and remain impressed.

Best of success to you both,
David Wine
by WaterWalker
Sun Feb 19, 2012 12:51 pm
Forum: Airboat Tech
Topic: Step Hulls & Air Flotation Airboats
Replies: 18
Views: 3387

Step Hulls & Air Flotation Airboats

2-19-12 I remember from aviation history that Glen Curtis was credited for developing the first “Step Hull” for flying boats and pontoons for aircraft in about 1912. The idea was that a sharp step at a mid to rearward position on a planning hull would serve to break the atmospheric pressure that adh...
by WaterWalker
Wed Feb 15, 2012 10:36 am
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Re: Gas Burn (MPG) of Airboats compared to other Vehicles?

A boat for the purpose, sure, there are airboats for the glades and airboats for running the rivers of Alaska. Whitebear suggested earlier in this thread that perhaps the entire basic configuration of airboats might be re-designed. A good look might provide the answer that no practical re-design is...
by WaterWalker
Tue Feb 14, 2012 11:36 am
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Re: Gas Burn (MPG) of Airboats compared to other Vehicles?

glades cat, Andrew McD, Whitebear & other contributors to this thread: Click, click, click, right down our long lists of guiding principles for fuel efficient and safer airboat design. This is all great stuff that is confirmed by many years of research and field experience. For my part, over the...
by WaterWalker
Mon Feb 13, 2012 9:12 pm
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Re: Gas Burn (MPG) of Airboats compared to other Vehicles?

Jinotown: I’m glad you were bored today. I readily concur that the real measure that we are seeking to reduce is that of “the work to be done” whether we talk of it by referencing MPG, MPH, average HP used & all at the fuel burn that we speak of as Brake Specific Fuel Consumption (BSFC) of typic...
by WaterWalker
Mon Feb 13, 2012 3:55 pm
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Re: Gas Burn (MPG) of Airboats compared to other Vehicles?

Andrew: Great. I don't see the radiator modeled. What are the prop diameters? so that one could compute the HP per square foot of disc area ratio for the combined two propellers? I have found that with a ratio of 10.61 HP per square foot of disc area that one can produce four pounds of thrust per HP...
by WaterWalker
Mon Feb 13, 2012 1:23 pm
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Re: Gas Burn (MPG) of Airboats compared to other Vehicles?

Andrew McD: Congrats on a neat design and a beautifully rendered computer model. What software did you use? Do you have a name for the airboat? Some good things that I see about your airboat are; • Twin props provide for a lower push point. • Props appear to be more of a turbine blade plan form, wid...
by WaterWalker
Sun Feb 12, 2012 11:03 pm
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Re: Gas Burn (MPG) of Airboats compared to other Vehicles?

10:47 PM 2-12-12 Oops! Chuck just got too excited. He wasn’t supposed to mention anything about a “new airboat design”. Nor plum either. So the cat’s out of the bag and we might as well hang it out. Actually in these bad economic times of the last few years, there has been a lot of scientific advanc...
by WaterWalker
Sun Feb 12, 2012 3:15 pm
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Re: Gas Burn (MPG) of Airboats compared to other Vehicles?

Our motto at Water Walker has always been “We are working to make airboating better”. This thread is for that purpose and I hope that it continues with interest for a considerable time Short answers, snips, hip shots, apples & oranges together with well thought out posts from learned, well read ...
by WaterWalker
Sun Feb 12, 2012 10:16 am
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Re: Gas Burn (MPG) of Airboats compared to other Vehicles?

maybe we need a type of dual drive system. One for in the water and one for out. Maybe buy a QUADSKI http://www.youtube.com/watch?v=xOCxT89ynbAM Buy really I am considering and second boat for everyday ridding and parking the hunting camping family ridding barge boat. I get less than 3 miles a gall...
by WaterWalker
Sat Feb 11, 2012 8:29 pm
Forum: Airboat Talk
Topic: Gas Burn (MPG) of Airboats compared to other Vehicles?
Replies: 78
Views: 9176

Gas Burn (MPG) of Airboats compared to other Vehicles?

Some thoughts about Airboat fuel burn. February 11, 2012 Comparisons of airboat fuel mileage (MPG) to some other vehicles; I see advertisements from Railroad companies that boast freight trains can haul a ton of freight 488 miles with a gallon of diesel fuel and that they are four times more efficie...
by WaterWalker
Sat Jan 21, 2012 12:13 pm
Forum: Airboat Tech
Topic: "Build a Fuel Efficient Four Passenger Quieter Airboat"
Replies: 47
Views: 6658

Re: "Build a Fuel Efficient Four Passenger Quieter Airboat"

David Wine I read your article on building an efficient boat. I was curious about one thing I noticed in the article. The "Blue OX" boat made 1650# of thrust with a 2.3 gear and a 82" 3 blade Maximus prop. Also, on "The Fox" boat, a ZZ383 was used and the torque was at 420#...
by WaterWalker
Wed Dec 28, 2011 2:54 pm
Forum: Airboat Tech
Topic: Measure your Airboat's HP using thrust and Blast Speed
Replies: 36
Views: 7722

Re: Measure your Airboat's HP using thrust and Blast Speed

Duane: I have been traveling the last several days and sorry for not posting sooner. Response to “Duh”! They are still talking about “lift”. Of course they are. They are still using the summary euphemism of “lift” to explain an otherwise very complex interaction of disturbed atmospheric pressure bal...
by WaterWalker
Fri Dec 23, 2011 7:17 pm
Forum: Airboat Tech
Topic: Measure your Airboat's HP using thrust and Blast Speed
Replies: 36
Views: 7722

Re: Measure your Airboat's HP using thrust and Blast Speed

RL: Your bout with the bumble bee sounds like a Disney movie clip scene. Too bad your girl friend wasn’t with you to film it. You could have sold it for enough to get a new airboat! :roll: What a great set of videos you posted to demonstrate airfoils in action. It was interesting to visually see wha...

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