vvvIIvvv's HPR115

[vvviivvv]

Don't have that cash and my current set... Everyone assured me I would hit 60 with them (easy)

New setup is gonna be £1500+ total any gerwin the 1.8 pitch where used when all other props failed, it only drew 60 amps tops with them

Started with 442 then 447 then 45/1.8

And Christ I can't afford annother set of props...

[Flying Scotsman]

I understand the cash point of view, but that is a very hot setup you have presently. How about just changing the motors only?

Douggie

[vvviivvv]

To a lower kv?

How do you mean a 'hot' set up... When I ran it without cooling for 3 mins without planing going flat out at points trying to get it to plane my gps logged 60 amps with the 1.8 3 blades temps on esc 28degres motors about same..

Will run tomorrow night and report back.. Where's my hatchtape?!?! Might need it if i get over the plane

[Flying Scotsman]

The rpm rating on your present system is high with 6S power and is in the SAW range, a lower Kv large motor with higher voltage input power is the way to go on large hulls IMO.

Douggie

[Flying Scotsman]

Another question are you supplying 6S power to each motor or only 3S as your amp and temp figures do not make sense.

Douggie

[vvviivvv]

6s per motor... i prettty much sore what people where successfully using in Europe lehner 1950/7 on 6s... thats a 1791kv motor on 6s... im on under 1600

[Flying Scotsman]

Edit, you are still too high on rpm with that motor, it may be a touch too small

Douggie

[vvviivvv]

so are these lehner 1950 similar sizes to a 1527?

and wont have a chance to run it till friday... school work

[elvish]

I have the neu 1521 1.5D on 6s, and x447 and i have no trouble at all.
it may be your batteries, I had problems with acceleration until I figured out it was the lipos who were cutting off.

[vvviivvv]

this is the thing... you have 300 rpm/volt than me and people are telling me my rpm is too high??

i should of not listened to the people telling me to buy a 1y and bought the 1.5d like i planned on


also:

Twin Neu 1515 1Y 2200kv Motors
Hobbywing 180amp X2
Hyperion G3 35c 5s 5500mah

[RandyatBBY]

One thing if the boat is not getting on plane moving the CG foward will make it worse. So move the CG back,
Two make sure the RPM are winding out IE batteries are charged and radio is at full 125%
three Raise the struts to the top.
Four make sure the rudder is not turned.
Hope this will help,

[6S HYDRO]

Why do you only have 2 3s packs on the left side of the boat, i suspect this is your problem, you need twice the batteries

[vvviivvv]

Why do you only have 2 3s packs on the left side of the boat, i suspect this is your problem, you need twice the batteries

others where on charge at the time... its just a idea of where the battery's where positioned

[elvish]

my problem was my hyperion batteries....
i tried cheap flightmax from hk, and i have no problems

my first test

http://www.youtube.com/watch?v=wIq7mOUKb94

on a small lake in paris
not pushed more than 50% of the gas.
and my flex lets go because i had forgoten to tighten it.

[vvviivvv]

One thing if the boat is not getting on plane moving the CG foward will make it worse. So move the CG back,
Two make sure the RPM are winding out IE batteries are charged and radio is at full 125%
three Raise the struts to the top.
Four make sure the rudder is not turned.
Hope this will help,

to be honest i think the cg is too far back... or should my boat be powerful enough even with cg far back to work?

i spoke to manuel and he told me to drop the struts 2mm below flush with the bottom of the boat... but for the sake of undoing a 3mm allon key ill experiment with both


the batterys are 35c/60c or something turnigys...