Shonen's brushless projects

[Shonen]

(RCM no let me edit post?)

I took the Revos out again yesterday hoping there would be nobody at the park...there was indeed nobody but I shredded the spur gear right off the bat. ERBE was down for the day, but I was able to get some video of O-Revo with its adjusted shift point.



http://www.youtube.com/watch?v=uqKrdMwD7GE

shift is a bit early for my taste, I will fiddle with it more. and sorry...I will get the datalogs up asap.

[reno911]

Freaking awesome Ducted fan revo...

Need some more pictures of that one for sure.

[Shonen]

haha thanks man. There's some photos in the article written on Greyscale Racing, and in my build thread on Digital.Complex.

http://www.greyscaleracing.com/index...rucks&Itemid=8
http://www.digitalcomplex.org/index.php?showtopic=763

It's the only project I've ever dismantled to sell the parts, and I kind of regret it. Hopefully my friend that bought the E-Revo made up of EDF-Revo's guts enjoys it as much as I did.

[Overdriven]

Very cool builds. Btw, u can't edit posts after 24hours

[Shonen]

thanks for the info Overdriven (:


Here's the log of my run in the park for anyone interested!

[Shonen]

Kind of stagnant, brushless project wise...but I keep shredding my Gorilla Taped tires on the ERBE.


at first I just thought it was a bad finishing job, ie. where the tape overlaps


but then I realized that it happens on two sides of the tire


I will overlap this one more next time...

also, my new 1717 ceramic bearings came in. we shall see if they are indeed the right size.



How do you guys tape tires? Is two strips usually okay or do you guys double up?

ps. an interesting find by my friend while we went drifting this weekend:

the O-rings on my friend's Cyclone TC spool disintegrated (as you can probably tell by the existing O-ring) and he lost the locking pin. I gave him one of my TC5R's body clips, and strangely/luckily enough, it works. It doesn't fly out and it seems to be holding up fine.

pps. also, I'm wondering which method you guys use to remove tires from rims...I've been using CA debonder for the past several times, and this past weekend I tried the freezer method...which didn't work :s I left the tire in there for several days too.

[Shonen]

Updated my ERBE build thread, the ceramic bearings were indeed the correct size and they are now in. I also took the time to put TIM between the motor and the motor mount, I doubt it will affect much but it's worth a try.


Boca ceramic vs. Castle stock


Arctic Silver 5 application

http://www.digitalcomplex.org/index....=0&#entry11341

Also, did anyone else notice this? Castle's Phoenix ICE line seems to have a new look: http://www.castlecreations.com/produ...oenix_ice.html

hey,

love what you've done with this. i tried the 1717 in my e-revo but it was pretty much useless for racing.

Anyway, i noticed you were having issues with your front centre driveshaft.

I recently converted a LST XXL and for the centre shafts i used the LST CVD joint but the e-revo (diff to wheel) shaft. The only issue with this is that the trx CVD's use a ring to hold the pin in but you can use electrical tape to hold the pin in. Hope this made sense. Also, not sure if the centre shafts are a different size (dia of CVD ball joint area).

if this makes no sense tell me and i'll post up some pics of what i mean.

[x-y]

¿any update of the ducten fan car?

[Shonen]

love what you've done with this. i tried the 1717 in my e-revo but it was pretty much useless for racing.

Anyway, i noticed you were having issues with your front centre driveshaft.

I recently converted a LST XXL and for the centre shafts i used the LST CVD joint but the e-revo (diff to wheel) shaft. The only issue with this is that the trx CVD's use a ring to hold the pin in but you can use electrical tape to hold the pin in. Hope this made sense. Also, not sure if the centre shafts are a different size (dia of CVD ball joint area).

if this makes no sense tell me and i'll post up some pics of what i mean.

Thanks! Useless for racing indeed

I've never used the Traxxas CVA's, but the LST dogbone ends are 8mm balls which I believe are the same size, since I used the Traxxas Extended Cups on my transmission. The front of the E-Revo uses an extremely short shaft, so short in fact I could not find a 1:8 scale 8mm dogbone of that length. The closest I could come up with was the Tekno RC8 front CVA but if I recall correctly it has a 5mm bore, and it's quite pricey to be experimenting on. I'm no longer having any problems, the 7mm HPI dogbone seems to be holding up fine. I 'would like' an 8mm one, but the one I have works satisfactorily. (:

¿any update of the ducten fan car?

If you mean EDF-Revo, then it has been disassembled and its guts live on in my friend's E-Revo and my own O-Revo. However, funny that you mention it because I forgot to post up another EDF powered creation I've done with EDF-Revo's parts...


This is my Fancar v2.1, is uses one of the 4.5" fans and T600 motors from EDF-Revo. In this photo I was experimenting on running it on 8s with my old 4000mAh E-Revo lipos, but it's far too heavy this way. It's more fun to drive using the 6s 2650mAh lipos from O-Revo. This is more or less an almost finished project, my build thread for it is here, on D.C.

[BrianG]

Any vids of an EDF vehicle in action?

[Shonen]

yes, I do actually. (:

http://www.youtube.com/watch?v=YKye7j-QDbY
video of the first test run of EDF-Revo after its completion

http://www.youtube.com/watch?v=SmSQmgm6-VE
EDF-Revo at the park near my house, fixed camera

http://www.youtube.com/watch?v=mPcL4_1OYJ0
EDF-Revo at the park near my house, onboard camera (very loud, simultaneous video as fixed camera)

http://www.youtube.com/watch?v=EDs8KbfE4WU
One of my earliest EDF experiments, a tiny 55mm fan on my RC18B

http://www.youtube.com/watch?v=-I5q1n2xy8o
another vid of the RC18 with the fan duct taped on it

http://www.youtube.com/watch?v=-CdNy5pevFs
Fancar v2 onboard testing, using TT-01 bushings instead of bearings

http://www.youtube.com/watch?v=bIpFCnTc5_0
Fancar v2 with bearings, makes a huge difference

Fancar v2 did not have brakes, and used a Novak HV 6.5 system with a 3.5" ducted fan. v2.1 is the same TT-01 chassis but with the 4.5" EDF powered by a Turnigy T600 and Phoenix ICE 100, plus a brushed motor hooked up to a complete drivetrain for the sole purpose of braking.

[x-y]

nice projects

[BrianG]

Cool, thanks! Take-off is a bit slow, but they seem to work pretty well at higher speeds. Current draws must be less peaky than in normal cars.

[Shonen]

@x-y: thanks!

@BrianG: No prob! The currents are probably less peaky but compared to ground RC they will sustain higher current for longer, it's all down to the thrust velocity vs. the actual velocity of the fan. The Novak 6.5 in the 3.5" fan pulled 93A peak (Turnigy wattmeter) and runtimes for a similarly set-up car with a normal powertrain would be longer...Novak rates the 6.5 for 730W, which means around 60A input current assuming 85% efficiency. The T600's pulled ~83A each in EDF-Revo on 8s, not sure what it will be like on 6s. Assuming amps scale linearly in fans, it's about 60A which is just over the 20C continuous rating of my 6s battery.

Having to run the fan at high power a lot of the time pulls a lot of current though, I am fairly certain I got runtimes around what a jet/heli will expect (ten minutes tops). Despite being an amp hog, it's actually really fun to drive, even though it handles badly due to 25/75 weight distribution I have to fix Fancar v2.1 as I've borrowed its ESC and some other things for testing, next time I take it out I will make sure to shoot some video and post up the Phoenix log.