FDM 32 V-Hull Build - Need Build Advice

[boredom.is.me]

You can even sand lacquer after less than 2 hours provided you are in higher temps. I will never use enamel again, unless it was for a basher.

Dupli color offers a pretty decent rattle can that's available in a WIDE range of colors. Any autoparts store will carry them. I know O'Reileys would get supply from another shop if they don't have the specific color.

[Beaux]

Yes lacquer is the way to go . It is thinner but you can recoat quickly , checkout my pirate on the boat building site .

[Tamelesstgr]

Well, the T180 Version 2 that I had purchased died on the bench. Replaced it with a Turnigy 180 V3 and added a second cooling pipe as that is how the previous ESC was set up. Bench tested and programmed, things are as they should be. Few more things to tweak before I give her the maiden.

20160816_222820.jpg

20160816_222827.jpg

[Tamelesstgr]

Well, Maiden run was very very short because it was getting too dark outside to be comfortable driving. BUT!! She runs, no leaks!! Brief 30 second run a few times back and forth:

6S2P - 40mm Graupner Plastic Prop
High Amps = 70.88
High Watts = 1,667
High RPM = 23,923
High Speed = 28.8
High Motor Temp = 88.4
High Esc Temp = 84.0

Tonight I hope to make a longer run, there seems to be some turning issues, whips around pretty fast, need to adjust the steering sensativity, this hull has a lot of listing from side to side when turning, not sure if it's because of the design of the deep-V?

[Tamelesstgr]

Ran the big orange mono tonight, very small conservative prop, 1.4 x 40mm Graupner plastic prop. No video, but RPM's seem down about 25-30% from what I would expect. Trying to understand if that is due maybe to the weight of the boat, or maybe she's running too wet? I've got the COG at 30% roughly. Approximately 2min run

MAX RPM = 23,148 (1450kv x 25.2 volts = 32,866)
MAX Watts = 1,671 (motor capable of 3,500)
MAX Amps = 70.60
MAX Motor Temp = 99.9 (Measured at windings)
MAX ESC Temp = 88.6 (Measured inside cooling block)
Max GPS Speed = 30.3 mph
Fully charged 6s packs came back at 24.6 volts each

NSR 32 Leopard 1450kv 6S 40mm 8-22-16 Gauges.JPG

NSR 32 Leopard 1450KV 6S 40mm 8-22-16 Temp Chart.jpg

[Tamelesstgr]

NSR 32 Leopard 1450KV 6S 40mm 8-22-16 Amps Chart.jpg

NSR 32 Leopard 1450KV 6S 40mm 8-22-16 Watts Chart.jpg

NSR 32 Leopard 1450KV 6S 40mm 8-22-16 GPS Speed Chart.jpg

NSR 32 Leopard 1450KV 6S 40mm 8-22-16 RPM Chart.jpg

NSR 32 Leopard 1450KV 6S 40mm 8-22-16 Watts Chart.jpg

[785boats]

Something definitely doesn't look right there.
With only a small prop like that you should have been seein a lot more revs than that.
This might be a silly question, but did you set the throttle range with the TX after you programmed the ESC? The ESC might not be seeing full throttle.

[Tamelesstgr]

I'll have to look into that. I'm using a Traxxas controller (because I like the feel)
I did pull the trigger to 100% throttle before turning on the ESC and then released it

Here is a link to the controller:

https://traxxas.com/products/parts/transmitters/6509tqitraxxaslink2ch

[Tamelesstgr]

Been looking through the transmitter owners manual, I have a few things in mind:

1) It is possible that the Multi-function knob is set to alter the throttle sensativity, I can navigate through the menus and set the multi-function knob back to steering sensativity.

2) Secondly there is this 50/50 or 70/30 throttle neutral adjustment (provides more forward throttle travel at 70%, I am assuming for greater throttle control for cars and trucks) I'm going to reset the throttle calibration according to the Turnigy ESC manual and see if that helps.

3) I can hook up the boat on the bench with the eagletree datalogger and use live mode to test the RPMs. If none of that works I have a spare proboat transmitter and reciever I can swap out and see if that brings me all the RPMs I seek

[Tamelesstgr]

RPM Woes continue:

Reset all parameters on Traxxas transmitter, recalibrated throttle on ESC, no affect on RPM when monitored live on bench with EagleTree, still ~22-23k rpms max.

Swapped in ProBoat transmitter and reciever, recalibrated throttle on ESC, no affect on RPM when monitored live on bench with EagleTree, still ~22-23k rpms max.

Pulled ESC and reprogrammed to no LVC, and no auto-detect cells, set at 6s, still ~22-23k rpms max. I'm perplexed and going to bed.

[785boats]

Kenny.
Check that the LED on the ESC turns green when you apply full throttle.
If it doesn't, then the ESC is not receiving a full throttle signal from your TX.

[Tamelesstgr]

LED is red then turns green at full throttle.

[Tamelesstgr]

Update, the EagleTree was the issue, I had been using a profile for the 6-pole Aquacraft 2030kv motor, and it was skewing the RPMS readings. On the bench last night everything worked out perfectly, T180 is programmed for 6s (not auto-detect) timing set to 3.75 degrees for the D-wind motor, and LVC at lowest setting. With the new 4-pole profile on live mode the Leopard 1450kv read 33,xxx rpms unloaded, exactly where it needs to be. Big thanks to Paul for his bits of wisdom!

She's back together and ready to hit the water.

[785boats]

Good to see is was a simple programme change in the Eagle Tree.

[Tamelesstgr]

Well, better run today, albeit getting dark again so no video. Went from 40mm plastic to Octura X442.

Max Amps = 99.42
Max Watts = 2,282
Max RPMS = 34,642 (Average loaded around 29,500)
Max MPH = 35.7 (picked up 5mph)
Motor Max Temp = 109.0
ESC Max Temp = 94.5

Looks like lots of headroom left, going to try to do a backup run with the ESC and Motor. Not quite sure if I need a longer straightline run for the GPS calibration?

NSR 32 Leopard 1450kv 6S X442 Prop 8-28-16 Gauges.JPG