Dobbertin HydroCar - Water Test 3 - Amphibious Vehicle

 (Continued from Water Test Two)
 For the first time, the HydroCar sat in calm water with the nose higher than the rear.
 The prop only needed to be trimmed down a couple degrees to be completely submerged.
 This time the front end of the HydroCar actually raised when the RPM was increased.
 The prop was still creating a huge 'rooster tail', so we lowered the trim to compensate, but still couldn't get the necessary 'bite' to get it up on plane.
 When adding the trim angle to the angle of the craft, we found the prop was still angled downward around twelve to fifteen degrees -- resulting in a less than optimal angle for forward motion.
 Modifications after Water Test Three:
 We went back to the dock and added four fifty-pound sandbags to the rear deck.
 We also switched over to a four-bladed prop with a greater pitch.
 We were hoping that these modifications would result in a better attack angle for the prop with less cavitation...

Category:

Autos & Vehicles

Tags:

• Dobbertin
• HydroCar
• amphibious
• amphibian
• carboat
• car
• boat
• vehicle
• watercar
• amphicar
• watercraft
• ultimate
• high
• tech
• water
• toy
• test
• experimental
• custom
• outdoors
• automobiles
• cruiser
• boats
• cars
• stunts
• offroad