Delta Force 29 (knock off) Build

[j.m.]

I didn't think that sounded right...

Some guy on youtube had his 4s df 29 running @ 51mph on a 9xl and a prather 230. He says his cg is 230mm from the transom with 1.5 deg... down... on the strut. o.O No tabs though.

He's got a hydra 120, and calculated the avg amp draw to be somewhere around 90...

[ED66677]

you're talking about Jasoncourt11 pulling 91A? but the 230 is a hudge prop!

[ksm2001]

There is your problem...no timing. Even the AQ ESC for the UL1 has 10 degrees from the factory.

7-10 would be good.

Jeff I thought that the Feigao's being a 2 pole motor should be run around 0 timming, and the aquacraft UL1 or SV27 motors which are 4 poles should be set higher 7-10.

I'm already running high rpm's so wondering how higher timming is going to change things, I'm still kinda green in FE so just asking.

Thanks
Ken

[line6]

On my df29 with a 8xl and a hydra120 im running the old firmware and the timing is at 16.25 if im not mistaken. with a M445 prop i have hit 63 on a gps running very loose. in sport trim with a 442 prop its around 55. I cooked a stock sv motor with the hyrda and the same timing in like 30sec. at the time I didnt know the timing was that high there was a issue with the old firmware. so i think the 2 pole can run more timing than the 4 pole sv motor.

[Flying Scotsman]

5 to 7 should just work fine

Douggie

[ksm2001]

5 to 7 should just work fine

Douggie

Thanks Douggie I will give it a try at those settings. Hopefully I'll get it out this weekend and will post results.

Ken

[Punisher 67]

Sorry Jason but the higher the pole count generaly the higher the timing should be , two poles need very little

[line6]

the Sv is a 6 pole not a 4. Peter that may be the case. My results with these two motors are what is stated. If you do start adding timing please go up in small amount's and low run times and check your temps. Good luck

[ksm2001]

Thanks Line6 I will give it a try, would love to see the speeds you have

[ksm2001]

It does seem a little off to me. it runs well, a little wet but not bad. are your lipos in good shape? also did you play with any timing in the speed control. and if you can please post a pic of where you have the setup now to get 28% cog if you don't mind. the lowest i can get is 29% 4s1p and little over 30% with 4s2p.

I remove the the tabs last night and the cg is now at 29%, might mount the inner ones 1/16" up from the bottom of the transom that Doug suggested to me if it runs good.

Ken

[Punisher 67]

Kind of a grey area for me Jason I am just going off my Schulze manual but the general consensus from what I have read is the higher the pole count the more timing it needs and can tolerate , My two pole Lehner 3080 runs minimum timing and my 4 pole Neus are the next timing setting up

[tylerm]

From what i have read the Y wind neus like a bit of timing, and the D winds like minimum? But seeing as were talking fejoas, i find a bit of timing is good. If your using the HiModel 200 set it up at 8* timing, and let her rip

[ksm2001]

57mph

Ok, had a chance to do some test runs yesterday water was almost glass smooth. I removed the trim tabs but had to add 3oz of weight to the back of the transom to keep my cg at 28%. Batteries used were Polyrc 4900 4s1p, 25/50c.

Prop = x442
Strut = 2 degrees positive
Timing = 1 degrees
Max amps = 120
Rpm = 30000
Speed= 42mph

Prop = m445
Strut = 2 degrees positive
Timing = 7 degrees
Max amps =153
RPM = 32000
Speed = 57 mph

Temps were 116 degrees for the esc, 106 for the motor and 122 for the batteries. I have to watch the amps with the m445 and will probably run the x442 most of the time, don’t want to push the batts. The trim tabs are not needed IMO for this hull at 57mph the hull is still stable. Over all I was very happy with this so far. Thanks everyone for your help.


Ken

[Punisher 67]

57 MPH Ken I wish I was there yesterday to see that ,...............60 miles per hour come on down.......

[line6]

Great job ken i new you would get her figured out. Q for you about how long are you ruining to get those temps mine are i bit higher except for the batteries they have yet to break 100deg. I updated the firmware last night and set the timing at 7 and it lost 2mph but the temps seemed about the same.



Jason