Leopard 5692/5698; castle 2080; lehner. Which has the best bang for the $$$

[JIM MARCUM]

I've been reading various threads discussing these top end motors. Has anyone actually done any semi-scientific comparisons between them? i.e, VARIABLE = TOP SPEED; same boat, prop, ESC and conditions? NOTE: That should be a Castle 2028 - not 2080 (THX, Make-a-wake)

Or, bench testing under load comparing horsepower produced under controlled conditions? (VARIABLE = HORSEPOWER)

Or, destructive testing to determine at which point each motor will fail? (VARIABLES = TIME, HEAT: under controlled voltage, amperage, etc. conditions)

It appears to me that how you setup your FE boat - which LIPO, ESC, CG, and prop(s), as well motor KV - are more important than which brand motor you run.

I have built 6 FE cats for NAMBA classes N-2 thru S & T. All run Leopard motors, none have failed, yet.

What do you think? JIM

[Make-a-Wake]

I have a 5698 Leopard which is a strong motor, and a 2028(you listed 2080 btw) which is a beast!!! I have data logged in excess of 8000 watts with my 2028 on 10s.

[JIM MARCUM]

I have a 5698 Leopard which is a strong motor, and a 2028(you listed 2080 btw) which is a beast!!! I have data logged in excess of 8000 watts with my 2028 on 10s.

The 56" S/T NAMBA class Segad I'm holding in my picture ran 72 MPH with a single 5692 1040KV Leopard motor on 8S2P at last years Legg Lake SAWs. That, inspite of running a balanced but otherwise stock Octura prop and an inline rudder.

My goal is to hit mid 90s in S, and 105MPH in T Offshore SAWs in October. The center mount rudder will remain, but it will run twin CR 5692s (KV is classified) and twin de-tongued and repitched props.

JIM

[keithbradley]

The 56" S/T NAMBA class Segad I'm holding in my picture ran 72 MPH with a single 5692 1040KV Leopard motor on 8S2P at last years Legg Lake SAWs. That, inspite of running a balanced but otherwise stock Octura prop and an inline rudder.

My goal is to hit mid 90s in S, and 105MPH in T Offshore SAWs in October. The center mount rudder will remain, but it will run twin CR 5692s (KV is classified) and twin de-tongued and repitched props.

JIM

Isn't S a max 50" class?

[JIM MARCUM]

Isn't S a max 50" class?

Both NAMBA S & T Offshore classes have a maximum hull length of 60". To my knowledge, there is no minimum length in these classes.

The difference is voltage and capacity. 8S 10,000mAh total in S, 10S 12,000mAh in T.
JIM

[keithbradley]

Yeah, I just checked it out. I think maybe IMPBA is 50"...I've been looking at them lately but it's relatively new to me. I just recently started paying attention.

[RaceMechaniX]

Incorrect. S and T both have 12Ah limits, Q and below have 10Ah limits. 40" max length for Q, 60" for S and T.

[Make-a-Wake]

Hey Jim................here's a graph of one of my 47" mono runs on 10s2p with a Castle 2028.............over 8288 watts average and 9208 max!!!!!!!

[Brushless55]

The 56" S/T NAMBA class Segad I'm holding in my picture ran 72 MPH with a single 5692 1040KV Leopard motor on 8S2P at last years Legg Lake SAWs. That, inspite of running a balanced but otherwise stock Octura prop and an inline rudder.

My goal is to hit mid 90s in S, and 105MPH in T Offshore SAWs in October. The center mount rudder will remain, but it will run twin CR 5692s (KV is classified) and twin de-tongued and repitched props.

JIM

Hey Jim, what prop were you running on that setup?
thanks

[JIM MARCUM]

Incorrect. S and T both have 12Ah limits, Q and below have 10Ah limits. 40" max length for Q, 60" for S and T.

I stand corrected. Thanks Tyler.

Here is the link to NAMBA FE Rules: http://www.namba.com/content/library...a_rulebook.pdf

JIM

[JIM MARCUM]

Hey Jim................here's a graph of one of my 47" mono runs on 10s2p with a Castle 2028.............over 8288 watts average and 9208 max!!!!!!!

Very impressive! Max's of 256.8 Amps; 9,208 Watts; 53,728 RPM; 695 Watts average; and 18 minutes run time. Awesome.

JIM

[JIM MARCUM]

Hey Jim, what prop were you running on that setup?
thanks

Prop was a sharpened, balanced, polished & otherwise stock (no de-tounge) Octura X462. 72MPH ain't too bad, considering I was running cheap RedDragon LIPOs, a less than optimal prop, and dragging a speed killing straight line rudder in my propwash.

This was my first ever NAMBA FE race. My goal was to break the existing S class 68MPH SAW record. Goal achieved - but too late. The SAW record was raised by Boyd to 82.698MPH. Not positive, but I think Boyd was running twin Neu motors - don't know which ones - and Octura CR X442 props.

I replaced the Leopard 5692 1090KV with a 1340KV, but smoked the old Castle Hydra ICE HV on my first attempt. Never made it through the traps. No spares.

Current plan is to run a twin setup at the Legg Lake SAWs in October. Can twin Leopards beat twin Neu's? Guess we will find out.

JIM

[Fluid]

Max's of 256.8 Amps; 9,208 Watts; 53,728 RPM; 695 Watts average; and 18 minutes run time. Awesome.

Eighteen minutes run time - we all wish! Actually the throttle was on for less then 5 minutes total, and he clearly charged between runs as the voltage and re-boot shows. The longest single run was about 2 minutes. Averaging over 200 amps for that last long run, I'd like to have seen the ripple and temp....



.

[keithbradley]

Eighteen minutes run time - we all wish! Actually the throttle was on for less then 5 minutes total, and he clearly charged between runs as the voltage and re-boot shows. The longest single run was about 2 minutes. Averaging over 200 amps for that last long run, I'd like to have seen the ripple and temp....



.

I also think the motor pole setting was at 2 reading double RPM from a 4 pole motor.

[Make-a-Wake]

Very impressive! Max's of 256.8 Amps; 9,208 Watts; 53,728 RPM; 695 Watts average; and 18 minutes run time. Awesome.

JIM

The Data is from 4 runs I believe, a couple short ones at first for setup testing, then a long one, then a long one a few days later.

All the data is correct except for the 57k rpms......set on 2 pole i believe....and i think the seconds are off too.........like they are doubled.........???