Project Mean Machine - Castle 1717 on 6s

[millzee]

Thanks mate, that's exactly what I needed to hear.
I picked up one of those "water damaged" hull and hardware kits so I'm going for a cheap build. I'm glad to see yours is bring you joy, keep having fun

[millzee]

actually, as you go up in voltage, amps come DOWN. So 4S will draw more amps than 6S. The motor is trying to achieve it's watt rating so if you reduce the volts, the amps have to go up. The highest amp eaters are 2S setups.

For example, you can actually run a NEU 1527 on 10S using only a 120A esc!

I'll make sure to monitor the temps and maybe hook up the eagle tree to help teach me about these things. Thanks again.

[FighterCat57]

actually, as you go up in voltage, amps come DOWN. So 4S will draw more amps than 6S. The motor is trying to achieve it's watt rating so if you reduce the volts, the amps have to go up. The highest amp eaters are 2S setups.

For example, you can actually run a NEU 1527 on 10S using only a 120A esc!

Jim, spinning a prop at a lower RPM will net you less amp draw.

6s 1580 w 447 = ~130 amps
4s 1580 w 447 = ~65 amps


It will take more amps to accommodate the same watt load, but if the watt load is drastically decreased, then the amp load is cut down as well.

No arguing that increasing the voltage, decreases the amps to do the same job, but you have to take into account the load before presenting a solution.

[FighterCat57]

Thanks mate, that's exactly what I needed to hear.
I picked up one of those "water damaged" hull and hardware kits so I'm going for a cheap build. I'm glad to see yours is bring you joy, keep having fun

Nice!

I've found that replacing the rudder with a tapered rudder helps in cornering.

Overall so far it's been a great hull, lots of fun!

[FighterCat57]

OK, I still don't know what happened to the strut/cable, BUT, it was fused together. I had to use the vice and an hammer with some heat to get them apart.

Now the cable doesn't fit into the strut. It somehow expanded. It doesn't fit into my other strut either.

So, now that I have the new 3/16" wire drives updated, figured I try one out with an m447. I re-installed the .078 wire drive and the stainless collet.

Good time to fit the 6s long lipos too, so now it's 6s2p 25c 10,000 mah.

Should make for a zippy little bugger and some fun run times.

[wparsons]

Jim, spinning a prop at a lower RPM will net you less amp draw.

6s 1580 w 447 = ~130 amps
4s 1580 w 447 = ~65 amps


It will take more amps to accommodate the same watt load, but if the watt load is drastically decreased, then the amp load is cut down as well.

No arguing that increasing the voltage, decreases the amps to do the same job, but you have to take into account the load before presenting a solution.

Bingo, and at the same time if you raise the voltage without changing anything else you will absolutely increase the current draw.

Higher voltage setups draw less amps because you run a lower kv motor and/or a smaller prop.

If you don't change the setup at all, adding volts will increase amps and decreasing volts will decrease amps.

[FighterCat57]

Some updated photos;

Plenty of room in this hull. I have some pipe insulation I plan to use to secure the batteries in place. (they are also velcro'd)

[ray schrauwen]

I told my buddy how well the 1717 would perform but, he just would not budge. He opted for a Leopard... Not to say one was better than the other but Castle does have a good record for their motors.
I bought one from the sale and I wish I bought a skid load. Sold it, had remorse and bought another one just the other day on Ebay for $120.

Mine will go in the Phantom 29" cat. Very heavy for a 29" cat @ 3.5lbs bare hull. It said 800grams on the description.

[millzee]

How have you found the weight of 2x 6s 5000mah with the 1717, after making my mount and reinforcing the hull, I'm starting to worry that she'll be too heavy. Does your boat sit in the water well with all the weight?

[FighterCat57]

How have you found the weight of 2x 6s 5000mah with the 1717, after making my mount and reinforcing the hull, I'm starting to worry that she'll be too heavy. Does your boat sit in the water well with all the weight?

It sits nicely and rides nice. The extra weight seems to help stabilize it. With 1p I kept wondering when it would blow over. Now it's like a missile.

The stock strut seized up again, even with a new shaft. First on the Hughey and now on the wire stub. It's locked up so hard, I can't hammer it apart. It was freshly greased before the run and now locked up again. Time for a new strut.

[millzee]

damn, that sucks. I hope you get it sorted. I'm going to try running the stock strut and flex that come with the hull, I hope it won't cause me the same issue's. The flex is a little questionable but until I get another I'll try it.

[Boaterguy]

have you checked the strut temps? are you sure it's not welding itself/ soldering (if it's a soldered cable) to the flex?

[FighterCat57]

have you checked the strut temps? are you sure it's not welding itself/ soldering (if it's a soldered cable) to the flex?

Happened with a wire drive after it happened with a cable. Was the cable that came with the boat, so really confused. It's nicely greased up, just stuck like it's welded in place. There's no give when I try to break it loose. I've set the strut in a vice and hammered on the shaft, and it doesn't move...

[Brushless01]

Would the fightercat mount and a 1717 fit under the hatch ?
Thanks

[ray schrauwen]

How have you found the weight of 2x 6s 5000mah with the 1717, after making my mount and reinforcing the hull, I'm starting to worry that she'll be too heavy. Does your boat sit in the water well with all the weight?

Yes but the power & torque of the 1717 made my cat very uncontrollable with a 45mm prop. I have plans for the motor in a light 40" carbon mono.