jallenhenry

can anyone figure out the best prop to stick on a Hacker A30-12L that will harness the most power on a 36oz plane?


Hacker brushless recommends an 10x7 apcE though acorrding to motocalc (and my watt meter) the 10x7 doesnt come close to the motor's power capabilities....I would keep testing the A30-12L with my watt meter but it proves to be to dangerous as I have never owned such a powerful motor (it ripped apart my aluminum motor mount).
I am using a 3cell 4200mAh thunderpower for this setup (3s2p)


Here is Hacker's stats from their website:
A30-12L
rpm/v (Kv) 1000
Idle Current (Io) 2.1
Resistance (Ri) 0.030
on a 3cell LiPo
25A(continuous)
37A(max)
they suggest APC-E 9x6 to 10x7
400 peak watts

so then I called stevensaero and they told me an 11x5.5 apcE would work and it will but it wont give me the most power (great vertical performance).....only ok power

so I tried motocalc with several props and it gave me the most power (I think) with an 11x8.5 apcE and 12x6 apcE with amp draws at36-38amp (and the 12L can handle 37amps)...now I am not sure if I used the program right (1st time user) nor if I can trust motocalc.....so if anyone has any knowledge about the A30-12L or can simulate/test it that would be great. I would like the most power the motor can give me for 3d and extreme verticals on my 36oz plane without pushing the A30-12L over the edge.

thanks guys

tWestie

I have run Motocalc numbers on a Hacker A30 12L on a 35 oz. aerobatic plane with a 3700 mAh Lipo. It appeared to me the best prop was either a APC 11-7E or a Aeronaut 10.5-7. Both of these props pull about 35 amps.

But the best way to evaluate props is take a handful of props out on the field and try them out, narrow it down to 2 props, then repeat flights with each prop and select the one that suits your flying style the best.

Adamg-RCU

The Hacker A20-22L is comfortable running bursts of and being propped for 25A on a 3s lipo. It weighs 2oz. The 12L weighs 5oz. It should be very comfortable on 3s lipo pulling 50A for 500W, and more if you increase the voltage. I have no idea what prop will give you 50A draw on 3s lipo.

BTW, I've heard of lots of guys on rcgroups running ~33oz Stevens Aero Edge 540's on TP PL 3s2100 with the A20-20L or A30-28S in the 270-300W range. You aren't anywhere near the limits of your power system right now.

-Adam