Alex17

I know the differences between both props are the Bravo 1 gives more bow lift and the Hydromotive gives more stern lift. Now lets say you have a Bravo and raise up the engines shouldn't that be the same as putting on Hydro's. I dont think you can raise the engines as much with the Hydros as you can with the Bravos?

bbladesprops

The blade design and geometry are different.

You can change the performance of the boat and motor combination by adjusting X dimension with either propeller. You can't make one to be like the other though, by raising the X.

The Bravo 1 can typically maintain better efficiency at higher drive heights. This doesn't mean the Hydro isn't as good of a propeller, it just has a different personality and works better in some applications while the Bravo 1 works better in other applications.

throttleup

The Bravo I is oconsidered a bow lifting design and the original design Hydromotive (Semi-cleavers) are sternlifters.

Julie

VI Mike

SO which would do better in an older heavier boat?

Jnewton

How do ya know which part you need lifted???

bbladesprops

VI Mike, Bravo 1.

If the bow drops and the stern feels light at WOT, you need more bow lift.

If slip % raises at WOT, you need bow lift.

There are other examples too.

Call us anytime.

VI Mike

I think I get it know let me go see what happens at WOT

throttleup

Typicaly Deep Vee boats with no steps will run better in Bow Lifting props. Stepped hulls are candidates for stern lifters or bow lifters.

Julie

Alex17

Well Johno's Renegade ran better with the Hydro's even though he never tested the Bravo's he's running exceptionally well for the power he has. Has anyone ever tried a Bravo and then a Hydro on a concept? If so what were the performance differences?

Don Tamm

I have run both the Bravo 1 and Hydro Quad 1V, and the Hydro 1V-X which is somewhat Bravo 1 like in its design. The only surefire and scientific method to determine the right prop for your application is to test!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Test for the following, and don't be afraid to use a stopwatch.

1. Time to plane.
2. Cavitation while coming on plane.
3. Midrange speed versus rpm (effeciency).
4 Acceleration time (30 - 50) (40 - 70) etc.
5. Turning hold, blowout at various speeds. Both left and right hand turns. Can you feel the blowout coming and is it smooth ar all at once.
6. Top Speed vs RPM. Effeciency.
7. Smoothness.
8. Rough Water holding. Does it loose grip easily when in confused waters.

I know that most people only look at # 6, but the job of a good prop is to provide the best combination of all of the above. If you approach prop testing like race car drivers approach tire testing, you can see how foolish we are to only be concerned with the top speed and nothing else.

DonCig