75mph UL-1 6s Build - Possible or not?

[Fluid]

A club member runs one with a Castle 1515/1Y. It is quick but he has never spent the time to get the setup just right. Too, the build quality is a bit shaky. Set up well it's a 70 mph heat racer.



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[nate]

I kinnda disagree on this hull not running 75mph, yeah thats pushing it. I had a neu 1515 1.5y 1500kv running 5s and believe the last pass I got was 68mph and it was stable, but, I had diff strut and hardware.

[nate]

Its been years since this vid, but the fastest pass was 57mph w/m447. I swapped to I believe an x445 and trimmed the rudder and turn fin got 68mph with ease.

http://www.youtube.com/watch?v=RNAjbjWo8FE

[Jlov]

Damn Nate that's insane. How are you fitting 2 5S packs in your UL-1? You have pics in your album of it? Thx Jeff

[nate]

There 5s flightpower 3750mah's in Parr. They fit just perfect, snug fit top and bottom, and they add weight, which is a plus when running over 55mph. I though about running 6s, but that would just push the limits of this hull.

[nate]

Here ya go

[Jlov]

I just got in mail today a Leopard 4074 2150kv and a Swordfish 200a 2s-6s ESC to replace my stock stuff.. Gonna try it with a new S/B L40x57 3 I have. I have currently couple of sets of 7.4 2s1p 45c 5000mah lipos but was gonna buy some 4s for this new motor and ESC. Any thoughts? Thx Jeff

[Jlov]

Im on here now looking for one of those Neu 1515 1.5y 1500kv motors you had in that old thread. Is that what you still have in your UL-1?

[nate]

I parted the motor and esc out, and sold the hull. I have a white Ul1 now with the stock motor and 120amp esc on 5s w/x442 that runs high 50's all day, but the motor runs on the hot side after a straight pass.

I'm going to be honest, don't spend over 200bucks for a neu motor just to fit w/ the ul1 hull... I had bought it for my PTss21 build, and had the idea to through it in my ul1 for gigs, ended up staying in my ul1 longer than what I anticipated. I go for a leopard motor.

[Jlov]

Yes these just came....

[nate]

2150 on 5s should be ballistic! Maybe just stick with 4s power lol

[Shooter]

Its been years since this vid, but the fastest pass was 57mph w/m447. I swapped to I believe an x445 and trimmed the rudder and turn fin got 68mph with ease.

http://www.youtube.com/watch?v=RNAjbjWo8FE

That is awesome!!! Nice work!! But when it comes to heat racing/water conditions (i.e. not glass water), I'm with Jimmy. 50 is the absolute limit for that hull.

[silencespr]

sorry to wake up an old thread, which batteries would be best to run on a stock set up with upgraded prop for maximum speed?

thank you,