H&M no step 3

[roussos.p.antonios]

Hi!!!
i need your help,i have a H&M no step 3 and i will use a feigao 540 9xl
please tell me how many cells and what prop should i use for speeds up to 40.
if it is possible that
thank you
tony

[SJFE]

16 Nimh or 4s lipo on a 45mm prop should get you close. You will be pulling over 120 amps so buy a 200amp controller.

[roussos.p.antonios]

thank you!
what it will hapen if i use 18 cells my controller is a hydra 240

[SJFE]

If you are well cooled and setup correctly I would imagine the result will be a big smile . Please post some video.

[SJFE]

Just a quick side note I have been informed that the 9XL is only rated for about 75 amps. So I'm guessing that if your setup is heaver & has more friction in the driveline you may run into trouble. My hull is only 39oz & I run wire drive.
Tom

[Mich. Maniac]

Why soo many amps Tom? is the no-step 3 a much larger size hull than the one you have? Just curious. specially cause he is using a 9xl.

[Mich. Maniac]

actually just looked at the specs for that hull, looks like 29 1/2" length. I am just curious cause the sv is on a 8xl and same prop. I only run the 120A esc and hope that will be enough. sorry to jump on your post Tony. Just had a red light flash when I read the info.

[NorthernBoater]

I only run a a hydra 120 in my Syncron with an 9XL on 4s and I never have had any problems.

[roussos.p.antonios]

thank you for your help
so i tried my step 3 with the 9xl /75amp esc and 42prop first with 14cells 4300gp
it was ok but not very fast then i put 45prop it was better.
i tried the same set up with 18 cells 4300gp and 42 prop and it was faster(i didn't have a gps with me to check)all these with no problems(everything works fine with low temp.)
next i will try 18cells with 45prop to see what happen.
what do you have to say?
thank you
tony

[roussos.p.antonios]

next time i will try to sent videos

[roussos.p.antonios]

isn't it curious that with small esc everything works without problems
one more think
if i want to try lipo 4s or 6s at 25c how many
mha it should be
thank you for your help guys
tony

[Doug Smock]

Tony,
A 9XL on 12 cells and a x442 in a good running mono will pull 60 to 65 amps. Just be careful as you move up in voltage and or prop size with a 75 amp esc. Check heat often as you make changes.
As far as your LiPos, the higher the capacity the more runtime you'll have and the easier it will be on the cells.

Doug

[SJFE]

Tony my cat is 36 inches. I collected most of my data when running 16 nimh cells @ a gross weight of just over 8 pounds. Now with the dpr mission data starts recording the second you power the system. So all the numbers are on avarage. I recorded spikes of 160 amps in the turns. This is why I didn't like running a 120 amp esc. This is the data collected from a 16 cell run. Note the spikes. This was with a K40 prop. I thought the NS3 was closer to the size of my Jolly. I should have looked up your hull dimentions. Sorry for any confusion.

[NorthernBoater]

[QUOTE=SJFE;31775]Tony my cat is 36 inches. I collected most of my data when running 16 nimh cells @ a gross weight of just over 8 pounds. Now with the dpr mission data starts recording the second you power the system. So all the numbers are on avarage. I recorded spikes of 160 amps in the turns. This is why I didn't like running a 120 amp esc. This is the data collected from a 16 cell run. Note the spikes. This was with a K40 prop. I thought the NS3 was closer to the size of my Jolly. I should have looked up your hull dimentions. Sorry for any confusion.

According to the graph you posted I don't see any current spikes over about 90 amps. Am I reading something wrong?

[SJFE]

Looks like I posted the wrong graph. I have a crap load of them. I give up in this friggin thread. More trouble than it's worth.....