Hi I followed the link to the Bernoulli web page, but relating that to the close hauled performance of yachts in different depths of water is beyond my ...
Supporting what Paul says, there is a big difference between the hydrodynamics of keelboats sailing close-hauled (displacement-sailing at low Froude numbers in...
AIRWORTHYNESS OF POWER BOATS I have been thinking about this for many years - specifically since the flight of Donald Campbell's Bluebird. I am not sure how...
... The reason why the R/C airboats do so well is the fact that they have big, effective ailerons and elevators, sometimes on both the main hull and the...
This is very true! I have often thought about this myself. It seems amazing that these powerboaters never considered what would happen when their boats left...
I refer you to the WIG page http://www.se-technology.com/wig/index.php. It is a very technical solution that has not been really mastered to the point of...
... I think an interesting question that hasn't been asked or answered yet is why not? That is, given that the owners of Formula 1 powerboats ...
Dave Howorth
dave@...
Jun 4, 2007 9:27 pm
632
... If you want to see what an aerodynamically stabilised craft can look like then please have a look at Monofoil. Jon Howes designed it to be aerodynamically...
... As a few really big WIGs, like one of the Russians, have crashed, so it is not an easy game to play! Works better over flat surfaces - waves don't mix well...
In his book 'High Performance Sailing', Frank Bethwaite recounts his work on his High Speed Project (HSP), initially based on Dr Smith's book "The 40 Knot...
Tord "As a few really big WIGs, like one of the Russians, have crashed, so it is not an easy game to play! Works better over flat surfaces - waves don't mix...
If you are ready to use fly-by-wire type technology then, otherwise unstable, forward placed control surfaces could be used - probably far more effective for ...
... A catamaran speed boat is also a low aspect ratio lifting surface, with even lower aspect ratio than most WIGs :-)! ... Only through a limited range of...
A few extra bits to throw into the discussion. The designers of Bluebird looked at a rear horizontal tail during the design phase but considered as the rules...
In case you missed it (as I did) and are interested, this web page has more biographical info about Frank: http://www.bethwaite.com/about/1/ Giles Whittaker...
Apologies for my double AIRWORTH(Y/I)NESS OF POWER BOATS posting. I should have asked a moderator to delete the AIRWORTHYNESS one - or worked out how to do it...
... By serendipitous coincidence, I noticed today that the design article in July's Seahorse is about the NZ powerboat 'Sleepyhead' (see, e.g. ...
Dave Howorth
dave@...
Jun 6, 2007 7:44 pm
645
The Caspian sea thing was the ECKANOPLANE or somrthing like that. The GALAXY was always a large transport aircraft when I worked on it Robert Downhill ... ...
... The great problem is that with increasing angle of attack the less the power of the device, as it has to be moved to extreme angles to counteract the...
... It may, in fact, not be apathy which stops the application of WIG technology. Just for fun, I asked a friend of mine, a Boeing engineer, about WIGs. He...
... The first WIG was the Do-X, which could fly at altitude, but at a cost, so whenever possible it flew as a WIG! Big WIGs whould be diesel powered, as...
... This is true if the same type of powerplant is used, but modern diesels are very fuel-efficient and fairly light - gasturbines are not! But the speed...
Very interesting info about Big WIGs. Wikipedia explains that the purpose of the Ekranoplan was stealthy military rapid transport, operating at below-the-radar...
Tord said ... manufacture! You don't mention the condenser. Howard Hughes' experimental steam car had condensers fitted all round it, which was dangerously...
Rolls Royce have just made a car with a steam engine tacked on to recover the waste heat for providing more power to the wheels. Robert Downhill ... From:...
