Neu 2x 1521 1.5d or 1Y for 80mph...?

[vvviivvv]

I've seen the Hpr115 run 80mph+ with 2x Neu 1521's... unfortunately i couldn't get it out of the guy what motor winding he used,

the set up was 2x Neu 1521 Hydra 240 6s octura x447... im at the stage the minute offshore electrics has them in stock i will order

there is a difference of 6300 ish rpm's running it on 6s between the 2 motors,

i was planning on the 1.5d but if that boat i sore was a 1Y ill probs be doing 100mph?

i also plan to use propshop props instead of octura, a 4518/3 set and a 4714/2 is what ive got to try

i have raised this topic before but i never got a definitive answer i really dont want to spend all this money and ruin this boat, ( sounds weird but too slow counts as ruined too * i wont be buying any other motors for it*)

[Steven Vaccaro]

Not many people have done these, so getting an exact answer will be difficult. Also, If you email me what you want I can email you when they are available.

[mike martin]

I would think the 1ys would do it and a lot easier on the speedos you could even run it on 8 and 10s for saws runs

[vvviivvv]

I would think the 1ys would do it and a lot easier on the speedos you could even run it on 8 and 10s for saws runs

A 1y on 8s is 53k rpm...? Isn't that too much and then on 10s it's going to be higher than the 60k rpm and higher than the max volts?

7s might be a option although I wanted to run 6 max...

Steve, do you have a estimated delivery time for the neu's

[mike martin]

A 1y on 8s is 53k rpm...? Isn't that too much and then on 10s it's going to be higher than the 60k rpm and higher than the max volts?

7s might be a option although I wanted to run 6 max...

Steve, do you have a estimated delivery time for the neu's

I don,t know how you get 53k rpm I usualy use 3.8v per cell when calculating rpm for saws runs so 8s= 47120rpm and 10s = 58900rpm not the optamal rpm range but it will work beleive me I've done it more than once. any way that was just a ( if you wanted to thing) I would still go with the 2 1521 1y it should hit you goal and everything will run longer and cooler. just my $0.02 good luck with the project I would love to see it run when your done.

[Steven Vaccaro]

Steve, do you have a estimated delivery time for the neu's

I dont. Basically this is how it works.
I have a constant order going and when they make a motor or motors, they ship.
Its not the fastest motor to get, but it is the fastest motor

[vvviivvv]

Ok, I will run the Y over the D

i did get this off someone tho,

Hi

We made the first test's with 2 lehner 1950/6 on 6 s Zippy's and managed to get the boat running 142 km/h.But the prob was that the engines getting very hot.
So we changed to the neu 1521/1,5 (1900upm) and the boat is runing the same speed but the engines are cold !!
During our experience with the MHZ mystics (180cm,113cm,84cm) we noticed that the weight of the boat is more important than we thought.
So benny (owner of the boat) made the decision to change his setup to the neu1521/1 at 5s to get less weight in his boat.
That is the only reason for this decision.
I don't think that you had to change your setup to the 1521/1 on 6 s.
You'l had to know that some guys running the 113cm mystic @ 174 km/h here in germany.

[elvish]

hello
a question am having on this,
If we take neu motor(same model),
would the motor with smaller kv and higher amps, work better than the one with higher kv and less amps, if in the end they both give the same amount of rpm.
hope you understand what am trying to ask :)

[vvviivvv]

do you mean volts not amps?

[sailr]

Bear in mind that, generally speaking, as you go up in KV, you go DOWN in prop size!

hello
a question am having on this,
If we take neu motor(same model),
would the motor with smaller kv and higher amps, work better than the one with higher kv and less amps, if in the end they both give the same amount of rpm.
hope you understand what am trying to ask :)

[elvish]

do you mean volts not amps?

yes sorry...

lets take examples:

neu 1521/1.5Y 1050Kv X 3.7v X 11cell = 42735
neu 1521/1Y 1577Kv X 3.7v X 7cell = 40844.3
neu 1521/1.5D 1860Kv X 3.7v X 6cell = 41292
neu 1521/1D 2900Kv X 3.7v X 4cell = 42920

will they perfom equally well?

[vvviivvv]

yes sorry...

lets take examples:

neu 1521/1.5Y 1050Kv X 3.7v X 11cell = 42735
neu 1521/1Y 1577Kv X 3.7v X 7cell = 40844.3
neu 1521/1.5D 1860Kv X 3.7v X 6cell = 41292
neu 1521/1D 2900Kv X 3.7v X 4cell = 42920

will they perfom equally well?

Not 100% but the 1.5y will swing the biggest prop and have the lowest amp draw (compared to the others on same prop) the 1521/1D will have the highest

but then there is alot of weight difference between a 11 cell pack and a 4 cell pack

[mike martin]

Ok, I will run the Y over the D

i did get this off someone tho,

Hi

We made the first test's with 2 lehner 1950/6 on 6 s Zippy's and managed to get the boat running 142 km/h.But the prob was that the engines getting very hot.
So we changed to the neu 1521/1,5 (1900upm) and the boat is runing the same speed but the engines are cold !!
During our experience with the MHZ mystics (180cm,113cm,84cm) we noticed that the weight of the boat is more important than we thought.
So benny (owner of the boat) made the decision to change his setup to the neu1521/1 at 5s to get less weight in his boat.
That is the only reason for this decision.
I don't think that you had to change your setup to the 1521/1 on 6 s.
You'l had to know that some guys running the 113cm mystic @ 174 km/h here in germany.

I don,t understand are they running the 1.5d on 5s ? if so that wouldn,t be so bad the rpm would be about the same as the 1y on 6s. another good option if you haven,t got the batteries yet

[vvviivvv]

I don,t understand are they running the 1.5d on 5s ? if so that wouldn,t be so bad the rpm would be about the same as the 1y on 6s. another good option if you haven,t got the batteries yet

ill email him and ask for more specifics but i got the idea of 1521 1.5d on 6s and now 1d on 5s...?

[vvviivvv]

ahh i want to scream, doing some math and all the speed toy set ups are running around 40 - 42k rpm... is the Neu 1521 comparable to a Lehner 2240? there are 2240/8 set ups that are on 6s which are 10Kv less than a Neu 1521 1.5d... if a Neu will have the torque and be able to handle this, ill be getting a 1.5D