Scale Hydro Prop Recommendations

[Dr. Jet]

Whoa, hold on there turbo.......... A 1521/1D on 6S in THAT hull?


That is a light plastic hull that is probably not up to the task structurally. You will be much happier in the end if you make it into a N-2, SSH, or LSH setup.

N-2 is a 2S setup with an appropriate motor, SSH uses the SV-27 (cheap) system on 4S, and LSH uses a Speed 700 on 4S. A good N-2 setup will put you in the 50s (with a top-end motor); SSH in the low to mid 40s, and LSH in the high 30s~low 40s.

If I had that hull, I would go for an N-2 arrangement with a "sport" motor. Something like a Feigao 540L.

Just my 2¢.

[JLG627]

Thank You

THANK YOU to everyone who has replied, it has been much appreciated and I am a little wiser in the world of Fast Electric boating because of it!

[Avanti]

Why does everyone always have to bash dreams on the net?
Let the guy build his rocketship.
He simply asked for prop suggestions, so give him what he wants, don't kill his dream.
It might work and then we will have more options opened to us.
If no one was willing to try anything new we would all have rubberband powered boats.

That being said I have no idea what prop you should use.

[Bill-SOCAL]

I guess what I'm trying to say is, I want to see 60-65mph out of this little rocket and I want to know what prop(s) will get me there.

JLG627

I agree with the other posts, anything above 4S is insane and a waste of power. You will not be able to keep the boat on the water.

I have a 24-inch hydro, a H&M Viper. With a Lehner 1940/8 (1959 Kv) on 4S1P turning a x637 prop it just touches 60 mph and it is nearly impossible to keep on the water and is really not a whole lot of fun to drive.

When you start getting too much over 30,000 rpm all you are doing is wasting power.

[Bill-SOCAL]

Why does everyone always have to bash dreams on the net?
Let the guy build his rocketship.
He simply asked for prop suggestions, so give him what he wants, don't kill his dream.
It might work and then we will have more options opened to us.
If no one was willing to try anything new we would all have rubberband powered boats.

That being said I have no idea what prop you should use.

Well, I don't see it as "bashing his dreams". It is more like trying to save him a whole truckload of frustration and expense. People who posted tried to share their experience with similar set ups. People know what works, and what does not work.

Sort of like if he posted that he had a 1963 VW Beetle that he planned on putting a 60,000 SHP turbine in and wanted to know what tires we recommended.

True it "might work" but a whole boat load of experience says that it probably will not.

Oh well.

[Avanti]

everyone said my df33 build would not work with my set up yet I run right there with the neu powered boats, but whatever the internet is not going to change so bash away, but I hope he goes through with his plans to prove the masses wrong.

[rockwerks]

everyone said my df33 build would not work with my set up yet I run right there with the neu powered boats, but whatever the internet is not going to change so bash away, but I hope he goes through with his plans to prove the masses wrong.

Im with you, if people never stretched the boundaries we would still be running 41" fountains in N1 and speeds would still be in the 30's at best

Experience is great but experimentation is paramount for our sport to grow

[Bill-SOCAL]

The point is that people HAVE stretched the boundaries and they try to tell people what they found when they got there!!

Plus, everyone seems to have a different definition of "what works" means. To me what works means you can do one of two things.

1) run a 1-mile oval heat race

or

2) run SAWS runs.

What works does NOT mean to me hauling butt for 50 feet, flying off the water and retrieving the boat and then doing it again.

It also means having an equipment set up that is not going to meltdown the minute it is put to use or will otherwise not be reliable.

I have no idea what your DF 33 set up is or who told you that it would not work or why. But in the case at hand I think it is abundantly clear that what the OP wanted to do has a very low probability of success. Turning a motor, any motor, at 60,000 rpm or more in a 24" hull is very unlikely to work. And I am not sure how he was going to stuff a 5S or 6S 8,000 mAh pack into that small of a boat in the first place (like he said he wanted to do).

What I cannot understand is how you and some others seem to confuse constructive criticism with "bashing".

Oh well, the OP was not stretching the boundaries into untried areas. He was planning to do something that clearly will not work. Knowing the difference between the two is the key I guess.

[AntronX]

I was not trying to bash his dream, just wanted to point out potential problems he might encounter with this configuration. Based on the parts he posted, it will cost him over $1000 in parts to get this boat in the water. I would hate to find out that on the first run, his boat gets destroyed and this investment sinks to the bottom of the lake. To reliably power 1/12 scale Bud, you should not need to spend this kind of money even if you went with CC and Neu. Hydra 120 + Neu 1512/2D + 3S1P 5000 mAh LiPo cost about $600. It will be even cheaper if he went with Feigao motor and some Chinese ESC.

[Dr. Jet]

with SoCal Bill

See, Bill and I can agree on some things.

It's not that we are bashing anything or anybody's ideas, we just want to help JLG experience success, not failure.

[Doug Smock]

Oh well, the OP was not stretching the boundaries into untried areas. He was planning to do something that clearly will not work. Knowing the difference between the two is the key I guess.

Doug