Topic Subscribe
WATCH  17 pages [ <<    <     2      3     ( 4 )     5      6     NEXT    >> ]24297 viewsPOST REPLY
HeliProz . Boca Bearings . Encore RC
. .

e-
Electric Conversions
 >

Hirobo SDX EP Conversion

Dr.Ben

rrMaster

Richmond, VA, USA

Nothing fancing there. Just use a usual 3mm nyloc until you get more of the OEM nuts.

Ben

Team Thunder Tiger Team Futaba Team Kontronik USA
Esprit Models Progressive RC

04-05-2010 Over year old.
airshares

Veteran

Thousand Oaks, CA

Cool thanks. I have plenty of those.

04-05-2010 Over year old.
HOMEPAGE  
airshares

Veteran

Thousand Oaks, CA

UPDATE: 4/5

I test hovered the SDX again today. This time on 8S
Its not optimal conditions for test flying today so I stuck with hovering.
Initial Curves are at +-12 and power at 0-80-100 in normal. (Which is all I tried today)
first spool up had some massive headspeed. Seemed ridiculously scary but I dont have a way to measure it. It seemed to compare to my TREX 500. I figured it was probably too much because I thought the 600mm should be around 2100.
I dialed down the power curve to 0-50-100. At that power it seemed more tame but still sounded like a BEAST whipping those blades around and had no problems getting in the air. I estimate I got of the ground somewhere just above half stick so probably running 60% power in the hover. pumped it a few times and you can tell it wants to move.
My first thoughts are that this motor is going to be plenty power but then again I haven't gotten into the flying yet. It just seems so because of how far I had to dial down the power to keep the headspeed in a not so scary area.
No problems with my set up yet. C clip is fine and all is good so far.
After about 5 min of run time The motor was warm. Batteries and ESC seemed about the same temp which was just barely warm. Not as warm as the motor.
I will pull the data off the ICE tonight and see what it was doing. Stay Tuned. Hopefully the wind will die down tomorrow and I can actually fly.

04-06-2010 Over year old.
HOMEPAGE  
davidevo50

Senior Heliman

Montreal, PQ, Canada

Sounds good! Thanks for keeping us updated!

LIVE IN THE NOW!

04-06-2010 Over year old.
airshares

Veteran

Thousand Oaks, CA

Data.

Turns out the ESC was set on Airplane mode. I am logged in now and changed it to heli mode with Gov. on. I have the gov setting to SET RPM. I have 1600, 1900 and 2100.
that is based on 10tooth pinion and 87 tooth main gear. 8S 8 pole motor.

stay tuned.

04-06-2010 Over year old.
HOMEPAGE  
davidevo50

Senior Heliman

Montreal, PQ, Canada

Another weekend coming to it's end... Any fresh videos or data loging?

LIVE IN THE NOW!

04-11-2010 Over year old.
doorman

rrProfessor

Sherwood, Arkansas

Nothing This Weekend...

Nothing from here this weekend... COLD, and WINDY from 15 to 30+ winds.... got some shop work done though!!!!

Maybe Airshares will catch a break.....


Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations, Haiyin Battery

04-11-2010 Over year old.
blackbird

Veteran

thessaloniki-Greece

Hello, i'm going to convert my sdx to electric and i want to ask what motor to buy with 6s 22.2v set up for F3C.Is the 4025-890 right for the job and can i use a 60-70A esc because i have two extra.

Thank you, George.

04-11-2010 Over year old.
Dr.Ben

rrMaster

Richmond, VA, USA

As Stan will confirm, 6S is not the ideal way to go. The current demands are quite high, placing significant demands on batteries and ESC's. Achieving decent runtimes with desired headspeeds will be a challenge.

You'd be far better off with an 8S set up.

Ben Minor

Team Thunder Tiger Team Futaba Team Kontronik USA
Esprit Models Progressive RC

04-12-2010 Over year old.
blackbird

Veteran

thessaloniki-Greece

Thank you Dr.Ben , as far as the esc 60-70A is it ok? I'll try the 6s for now and see.What about the hacker A40-10L?

04-12-2010 Over year old.
airshares

Veteran

Thousand Oaks, CA

I've been flying my 8s SDX. I have data logging but I cant put the thing to the test because Im not a good enough pilot. So until the set up gets in some capable hands all I can say is I like it and it does what I want it to do but Im not a stick banging 3d pilot.
I haven't posted any data logs yet because I haven't gotten the bugs worked out yet. Im still flying around in Norm. at 1800hs because right now that is where the heli is perfect but I don't have any negative set up in that mode so I dont do anything other than fast circuits around the field.
I get a low head wobble in Idle 1 (1950) but I still fly it like that...and do mild aerobatics.
My tail wont hold in IDle 2 (2100) which where the heli seems like it will be a blast. Once I get the tail to hold I think that will be the tell all.

04-13-2010 Over year old.
HOMEPAGE  
doorman

rrProfessor

Sherwood, Arkansas

6s.....

Hello Blackbird,

Dr Ben is correct... I first set mine up with a 6s system and you had about a 1 to 2 minute run of good headspeed, but then it would level off for some OK only flying, but not much "pop" .....
Switched to an 8s system and now I have a 6 minute + of consistent headspeed in the low 2000 range,.... and it is a fun machine.... bet 12s would really be great, but motor mounts and low enough kv motors are still the problem... once we get a mount that we can get a bit more versitile with, then the games will begin...
As far as your using a 6s system, I am sure that you will not be happy with the results.... and you will want at least an 85amp (HV) ESC... my 6s set up could hit 90amps pretty easily.... if you do try it, get the highest c rated 6s you can... 40c+ might help....
Hope this info will help lead you in the right direction.....

Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations, Haiyin Battery

04-13-2010 Over year old.
Dr.Ben

rrMaster

Richmond, VA, USA

To give you an idea of how much increasing cell count decreases peak current in the system, my electric Eagle 3 will peak at about 3600 watts, sometimes as high 4000. Know what the peak current is? 90 amps, the same as Stan was getting with his 6S system and a much smaller motor.

If you try 6S, you'll need at least an 80 amp controller and 30-40C packs.

Ben Minor

Team Thunder Tiger Team Futaba Team Kontronik USA
Esprit Models Progressive RC

04-13-2010 Over year old.
blackbird

Veteran

thessaloniki-Greece

Thank you all for the answers.Is it better to put a higher kv motor like 1100 and with 5000mah lipo can i fly F3C shedule B program aprox. 8 min ?

04-13-2010 Over year old.
blackbird

Veteran

thessaloniki-Greece

Is it better to go 8s with scorpion 4025-740kv?

Thank you again.

04-13-2010 Over year old.
doorman

rrProfessor

Sherwood, Arkansas

Yes.....

Blackbird,

Yes the 8s set up is working rather nicely...
But for over 8 minutes of flying, I would think that 12s might be the better way to go....
Airshares, here on RR is running the 8s set up that you mention, and he is running the pinion direct to the main gear.... on my set up, I am using the Hirobo mount with a Neu motor (1100kv) on 8s, but I am going through the clutch.... my head speed is set for 2200rpm right not (I have switched to metal blade grips) and the power is awesome, and the flight time is just about 6.5 minutes on 5000mah batteries..
And the only reason that I am running such a high hs is that I am trying to keep the esc above 60% (my lowest setting).... I would have really liked to have tried an 850 kv in this mount, but was unable to find one....
But this set up would lend itself well to your style of flying, once the time issue is met...

Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations, Haiyin Battery

04-13-2010 Over year old.
blackbird

Veteran

thessaloniki-Greece

I have a ice75 esc is it ok to go with it for sport flying? Can i use the built in bec or is it better to put the align 2in1 that i already have?

Sorry for all those questions but in electrics i am new,thank you.

04-13-2010 Over year old.
doorman

rrProfessor

Sherwood, Arkansas

BEC

If you have the Ice 75 (not the lite), you will most likely do fine with a hs of about 1950... since it can take the occasional burst... but no, do not use the bec... add the Castle Creations pro unit...
This is a lot of machine when set up on electric, and it is an awesome flier... but using the minimums will not get you the performance that you are looking for, and also, in the worst case, could set you up for some serious damage... I always try to lean to the upper limit, more so then the lower.... this could turn very dangerous very fast if control is lost....
If it were me, with the data that you are getting from us, and I wanted to use the 75... I would be reworking the numbers so that I could use 10s and lower the amp draw even more to be on the safe side...

Good Luck with your project.... Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations, Haiyin Battery

04-13-2010 Over year old.
blackbird

Veteran

thessaloniki-Greece

I have the ice 75 no lite but can only take 8s and also do i use the align sytem?what do you think about going 10s with the 4025-740 or 4025-630 ?
Thank you,George.

04-13-2010 Over year old.
doorman

rrProfessor

Sherwood, Arkansas

10S

I think the 10s system with the 89t main and the 630 with the 10t pinion would turn out to be a very good combo.... but you would have to go to an HV esc.....
I am planning on doing another and the 10s will be on this one...the more I work with these, I am finding out why others are going to the 12s set ups...the higher voltage does make things work better.... and with the proper mount, the options are out there on the motors....

Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations, Haiyin Battery

04-13-2010 Over year old.
WATCH  17 pages [ <<    <     2      3     ( 4 )     5      6     NEXT    >> ]24297 viewsPOST REPLY
ExperienceRC . JR AMERICAS . HeliDirect
. .

e-
Electric Conversions
 >

Hirobo SDX EP Conversion

 Print TOPIC Advertisers 

Topic Subscribe

Thursday, September 18 - 4:41 pm - Copyright © 2000-2014 RunRyder   EMAILEnable Cookies