I'm into Unlimited Hydros.

[Clugh]

I'll drop all my hydroplane builds and ideas for them here.

I hope you enjoy,.
Hubert

[Clugh]

Hi Christian,
I'm going to load the Align into my 1/8th 1990 U-31 circus on the ABC 1818 prop in the photo above and see where it is empirically. It should turn it around 30,000 rpm at 150 ampere. I have the Futaba fast GPS All I need is to purchase the 10S lipo and go out to the lake. I need to prep the prop. I think i'll finally try to paint the boat this year... The stepped front sponson on the old boat works well and should corner like my old Phil Thomas SS45. It is skeletonized and light. Its a 4 point at it as rear pads that ride just above the props centerline. But before I load it I'm going to add water cooling directly to the parallel LRK wye bundles. I also plane to lose the thick aluminum turn fin with a 1/16th knife sharpened spring steel fin. All my Hydros will move to the thin sharpened spring steel fin JA showed me. This motor a prop combination in the FE calculator shows an efficiency significantly greater than 79% . I bet my bottom dollar it exceeds that empirically by a longshot.


Rm .oo5 ohms
Kv 824
Io 3.27 amps @22.5 volts including radial fan load.
Weight 448.8 grams

ABC 1818 calculated as most efficient prop in its database for performance hydro @ 12s lipo 9800 mah

33,940 rpm
153 amps
Pin 6.394 kilowatts
Pout 6.125 kilowatts
Run time 3.85 minutes
Est speed 90.12 mph or 145.03408 km/h
Eff. 95.80 %

In a performance hydro with 10s lipo @ 9800 mah and a castle 240. Prop wizard selected an ABC 1918 as the most efficient prop for the setup.
Resultant:
28,221 rpm
141 amps
4,955.78 watts Pin
4,728.58 watts Pout
run time 4.15 minutes
est speed 79.20 mph or 127.46 Km/h
Eff. 95.42%

Thank you.
Hubert