Trying to move water through a curved and angled tube at 100+ mph and I have a pinch point part way down. Can I put a slite curve in the sides to help eliminate this? Much like how the fueselage is narrowed at the winng attachment point in an airplane to decrease drag.
I have a jet pump for a boat I am designing and am having issues with a pinch point before the impeller. I was thinking of putting a gentle curve in the side walls of the pump housing to addres this issue. Are ther problems with doing this with high speed water(100+...
How would one calculate what size and how far apart to machine some small votex generators(basically slits) in a 8" dia tueb with water moving through it at 120 mph. The thinking here is that there is some drag that can be decreadsed by creating a boundry layer on the edges. Would this not make...
Trying to decide on a nozzle design. Right now we are using a 650 hp engine to move 4000 gal/min through an orfice that is 3.080 in Dia. Rough pressures are variable but are in the 200-250 area. The nozzle I have right now is 14" long and tapers down from the pump outlet od of 7" to the 3.080...
Can someone suggest a Naca 4 or 5 digit airfoil design that has shown good low speed lift with reasonable drag coeficient? The design I have at the present time would be close to a 6315. Low speed meaning less than 120 mph.
I have a cone that has an opening 6.125 15" long and an exit of 3.100. The center lines of the inlet and outlet are not the same and the outlet is at a 15 deg upswept angle. I have been trying to come up with the best shape that I can in order to move water through this at inlet speeds of 90...
allblowdup (Materials) 22 May 12 15:47
I have a muffler that I have built for a a sport boat. Problem is, it works to well. The boat is way to quiet. Some how I think i have actually got the dimensions correct to cancel out most of the desirable exhaust note. I have look around and cannot find...
I have a muffler that I have built for a a sport boat. Problem is, it works to well. The boat is way to quiet. Some how I think i have actually got the dimensions correct to cancel out most of the desirable exhaust note. I have look around and cannot find anywher to get any answer on what I...
I have a pre-designed airfoil. It is designed to make 50lbs of lift at 100 mph at 7deg at sea level. It is not a high camber wing. It measures roughly 22 wide with 17" chord 5% camber and 125 chord thickness. I want to install a gourney flap and am wondering how much extra lift I can expect with...
I race marathon jet boats at speeds of approx 100 mph on courses that are up to 60 miles long. The areodynamic shape of our hull is somewhat unique. It is an air trapping tunnel hull design so we have air exiting the back of the boat below as well as on the sides and above. Ours is an open...
