Lehner Motor choice??

[nate]

Someone please give me two good 6s Lehner motor choices to run on a hydra180hv. Thanks!

[Ub Hauled]

for what type of hull?

[Gerwin Brommer]

1950/7 High Amp
2240/8 High Amp

[nate]

Thanks.

[tth]

I can second the 1950/7 Hi Amp. I wish I would have never sold it!!!

[Fluid]

Both motors have pretty high Kvs for 6S power, particularly with a 180 Hydra in a mono. They both produce ca. 40,000 rpm - which is not sport or oval racing rpm.

Like Jan asked - what hull will it go into? And will you be racing or sport running? How much run time do you want? What works fine for one person may be a total failure for someone else - be smart about what you buy.




.

[nate]

Both motors have pretty high Kvs for 6S power, particularly with a 180 Hydra in a mono. They both produce ca. 40,000 rpm - which is not sport or oval racing rpm.

Like Jan asked - what hull will it go into? And will you be racing or sport running? How much run time do you want? What works fine for one person may be a total failure for someone else - be smart about what you buy.




.

Hey man thanks for the help, Well I haven't really decided on a hull just yet, I'm leaning on a PT45 or the Twin wing 1/10 37.5" Hydro that Rich is getting some good photo's from a friend for me. Fluid, I will not be racing this boat at all, I'm looking for a decent run time around atleast 4-6minutes, and trying for the high 60's if not a good 70mph even. Id like to jump on 70mph soon.

I will more than likely go with the Neu 1527 1500kv motor on 6s... but If I can reach a nice Lehner motor that will give me around the same output as the 1527 1500kv motor on 6s that will be great. Iv just always wanted a Lehner motor.

Also, Is the added price of a Lehner motor worth paying over Neu motors, and were can I get a water Jacket for the Lehner of choice here.

Thanks for all the help guys!

[Fluid]

I have run Lehners for years and still run a 3060/10T in my 10S cat. They have different power characteristics than the Neus but are high quality and perform great. One of our club members runs a 2250/8 (as I recall) in his 6S Phil Thomas sport hydro and it is very fast - but he has to run a small prop. Realize that you will not get 70 mph and 6 minutes of run time with any 6S setup. The PT hull is not comfortable at 70+ without some areodynamic aids....it was designed for 50 mph.

The Neu 1527/1.5D is a powerful motor and gets mid-60s for a 2 minute race heat in a well set-up hydro. You might get 4 minutes of battery time, but the temperatures will probably be the limiting factor. A better choice for a Neu with more run time at near the same speed is the 1527/1Y. You need a larger prop - no problem on the PT hull - and it is less of an amp hog than the 1.5D.

Fine Design used to have water jackets for the Lehner motors.



.

[kevinlew211]

I think Gerwin was confused you try to do twin 6s setup when he gave you idea about Lehner 1950 and 2240, with single setup, specially in PT45 hull, those motor is too small and too much rpm like Fluid said.
Btw, my PT45 got 72mph with Neu 2215 1y, Prather 235, i just love this setup, with 2 mins running time, even 6s2p Polyquest 5000, 25c will heat up to 135-140, i think you will ok with beter C lipos.

[Gerwin Brommer]

2240/8 on 6S in a mono is great. ( for example : MHZ Lizard Extreme)
1950/7 on 6S in a twin-cat is great ( for example HPR 115 etc etc etc )

Lizard Extreme on 6S1P, Lehner 2240-8 , AND a floodchamber !!!!

http://www.youtube.com/watch?v=ycFx1qRA_hU

[nate]

I have run Lehners for years and still run a 3060/10T in my 10S cat. They have different power characteristics than the Neus but are high quality and perform great. One of our club members runs a 2250/8 (as I recall) in his 6S Phil Thomas sport hydro and it is very fast - but he has to run a small prop. Realize that you will not get 70 mph and 6 minutes of run time with any 6S setup. The PT hull is not comfortable at 70+ without some areodynamic aids....it was designed for 50 mph.

The Neu 1527/1.5D is a powerful motor and gets mid-60s for a 2 minute race heat in a well set-up hydro. You might get 4 minutes of battery time, but the temperatures will probably be the limiting factor. A better choice for a Neu with more run time at near the same speed is the 1527/1Y. You need a larger prop - no problem on the PT hull - and it is less of an amp hog than the 1.5D.

Fine Design used to have water jackets for the Lehner motors.



.

Thanks for the help here. Few question's though, say I did run a 1527 1y, and try running were I want the boat... say mid 60's, will I not need a massive prop over an x450? If Im running a huge prop size, won't that alone pull more amps than a motor spinning a mid size prop with more RPM's? Just wondering.

Hey Fluid, Do you know anything about the 1/10 scale TwinWing Hydro hull from Hydro&Marine? Im getting the 37.5" version Iv decided.

If this helps, Id like to see this boat run atleast 66-68mph on an average of 3-4mintes, and on the low side of temps. Keep in mind its only for sport play here.

Thanks again!

[Fluid]

2240/8 on 6S in a mono is great. ( for example : MHZ Lizard Extreme)
1950/7 on 6S in a twin-cat is great ( for example HPR 115 etc etc etc )

Gerwin, I would never recommend a 40,000 rpm setup to a realtive newbie. In fact I would never run one myself except in SAW competition.....unless it was on a gearbox. Those motors would be great on 4S, but not for a single 6S application.


/

[Flying Scotsman]

Jay , as usual is spot on, I have never run over 28,000 rpm on my sport boats, I think? Saw is another matter.

Douggie

[Fluid]

...say I did run a 1527 1y, and try running were I want the boat... say mid 60's, will I not need a massive prop over an x450? If Im running a huge prop size, won't that alone pull more amps than a motor spinning a mid size prop with more RPM's?

You will need over 3.0 inches of pitch to reach the mid-60s with that motor. You do not need to use a huge diameter, just a higher pitch ratio like an x648 or a 1650 detongued with a slightly cupped leading edge. The 1527/1Y motor has more torque than the 1.5D does, and can handle a larger prop anyway - you will need to load it up to develop the needed power. I ran an x457/3 on my 1527/1Y-6S SprintCat and it was very fast, but the amp draw was a bit too high. It would work better on a hydro but certainly not for over 2 minutes.

Do you know anything about the 1/10 scale TwinWing Hydro hull from Hydro&Marine?

That doesn't have much room for high mAh packs. Before you buy, make certain that the packs you want to use will fit...and allow you to have the correct CG. A club member had one and could not get the CG right even with lead weights. It would not be my choice for a fast, fun hull. A Phil Thomas SS45 or Blazer Marine Whiplash are far better hulls IMO.

If this helps, Id like to see this boat run atleast 66-68mph on an average of 3-4mintes, and on the low side of temps. Keep in mind its only for sport play here...

I don't think you'll see both the speed and run time you need on 6S. You will be heat-limited, particularly in the summer with warm pond cooling water. Two minutes at 65 mph on good water with a properly set up boat, probably. Four minutes, probably not unless you prop down to the mid 50s. BTW that's WOT the whole time. I can't say what would happen at part throttle, you'd probably thermal the ESC.


.

[Gerwin Brommer]

Jay & Douggie :

http://hpr06.speedtoy.com/setup.htm