RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 1705 views POST REPLY
Helicopter
e-
Thunder Tiger
Raptor E700 › 6s - How can I make it work?
03-11-2015 04:16 PM  3 years agoPost 1
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

I'm finishing up the build on a used e700 V1 and am wanting to run it on a single 6s4000-5000 30c-45c.

My setup so far is:
12T pinion
Speed-up tail gears
stock 105mm tail blades
edge 690mm main blades
MKS BLS-970 cyclic/BLS-980 tail servo
AR7200BX
Castle Talon 120 HV w/40mm fan

I have a KDE 600XF-1100-G3 motor that I could use, but I'm thinking it might be just a bit to "hot" to run and not wind up with like 2-3 minute flight times, if that and over-current my ESC.

I'm looking for lower head speeds for sport, mild-3d. Like 1500-1700.

I expect the RTF air-frame sans batteries will be in the 7-7.25lb range. So, it should be equivalent to a heavy 600 with the added mass of the 700-size blades - right?

- Would a 4025-890 motor be the right way to go?

- I'd like to get more than 4-minute flights.

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-12-2015 02:47 PM  3 years agoPost 2
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

Dan,

I'd advise pretty strongly against a 690mm 6S model at that kind of headspeed. It's going to be tough to keep peak currents sensible and run times are not going to be good. And yes that is a lot of blade for either of the motors you suggested also at that headspeed. When folks do a 6S or 7S model with that much blade, they are usually running the same gearing and KV they used for 12S and turn about 1200. It's the only way to keep the esc happy and runtimes decent.

If you want to run a lighter weight overall set up, you might consider building as a <700 mm model, use a 25mm class motor, and run 12S 3700-4000's. That's pretty much what guys do with models like a Synergy E5 SS.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
03-12-2015 03:41 PM  3 years agoPost 3
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

I'd gladly go to a lower head speed for basic aerobatics and really soft 3D. I have no idea how low a headspeed the the e700 can go and still be flyable for non-aggressive flight.

I am trying to dial in the motor to be more efficient on 6s power rather than dumbing down a 12s capable motor.

I was also thinking that maybe the Neu 1912/1y 825Kv motor might be suitable.

Otherwise, I'll just bite the bullet, go the 12s 3700-4000 route, and go with a 400-500kv motor that will fit between the frames like the Hacker A50-14L, or Scorpion 4025-550, 4035-450, Xnova 4030-470KV 3Y, Neu 1912/2Y or equivalent.

If you have any different motor recommendations, I'm all ears.

thank you!

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-12-2015 03:46 PM  3 years agoPost 4
don s

rrElite Veteran

Chesapeake, VA

My Posts: All  Forum  Topic

What's the gearing?

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-12-2015 03:57 PM  3 years agoPost 5
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

Gearing is 128T main, 12T pinion. 13 and 14t pinions are optional.

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-12-2015 04:30 PM  3 years agoPost 6
don s

rrElite Veteran

Chesapeake, VA

My Posts: All  Forum  Topic

On 6S I would shoot for something in the 700-750kV range and about 1300rpm.

I think 890-1100kV at 1600 would be stressing things a bit.

12S in the 400kV range and 1400rpm would work better. I would use 12S.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-12-2015 05:40 PM  3 years agoPost 7
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

on 6s, then maybe the Scorpion HKIII-4025-730 10p?

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-12-2015 06:17 PM  3 years agoPost 8
don s

rrElite Veteran

Chesapeake, VA

My Posts: All  Forum  Topic

Watch the amp logs...

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-12-2015 09:32 PM  3 years agoPost 9
f2000ez

rrApprentice

Warrenton, VA

My Posts: All  Forum  Topic

I would also look at the Pyro 700-45L motor

PM  EMAIL  GALLERY  Attn:RR  Quote
03-12-2015 09:59 PM  3 years agoPost 10
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

Since he's trying to go low voltage he's going to need a higher Kv motor otherwise he won't be able to reach his desired head speed.

  

PM  EMAIL  GALLERY  Attn:RR  Quote
03-14-2015 02:15 AM  3 years agoPost 11
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

Ben's advice
I opted to go towards Ben's advice to go 12s 4600-5100 (will go with Revolectrix Blend425 30C packs) and Gary Wright's advice on a Hacker A50 14L Turnado V3 400kv 10 pole motor. I'll be able to run 1100-1600 with 12t-14t pinions with the SetRPM governor options and stay between throttle output of 70%-94%.

Trying to get the model to fly well on a true 6s setup seems foolish when I'm not well off enough to just buy a bunch of stuff to try when I can't find any other examples of people doing this.

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-15-2015 03:31 AM  3 years agoPost 12
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

With 12S, you'll only buy once and be happy.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
03-18-2015 02:16 PM  3 years agoPost 13
prototype3a

rrApprentice

Christiansburg,VA

My Posts: All  Forum  Topic

I was recently thinking that the Gaui 4020-(~900kv) motor would be an interesting option. As you stated, the other option is a 4025-890 but I suspect the 4020 would be the lighter/better option if C/G wasn't a huge problem.

I used to hunt and hunt and hunt some more for the perfect motor for my projects but now that I rewind motors, it actually makes it even harder. I have to choose between stock motors that might work, motors as rewinding candidates and what kv, termination and wire size.

~Drew

PM  EMAIL  GALLERY  Attn:RR  Quote
03-18-2015 02:31 PM  3 years agoPost 14
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

Drew,

I didn't consider the 4020-series because I felt that it wouldn't have enough mass or inertia to cope with this size model at the kind of RPM levels to produce the head speeds necessary for adequate sport performance (1400-1700).

I don't believe this air-frame could be made light enough for it to be feasible, but I'd love to see someone else try

I know you've put quite small motors in your Logo 500, but that is obviously a much smaller and considerably lighter model where you can get away with it by reducing weight with mini servos and your other mods.

I can't install mini servos in a 690-blade model and expect them to cope with the loads.

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-18-2015 02:43 PM  3 years agoPost 15
prototype3a

rrApprentice

Christiansburg,VA

My Posts: All  Forum  Topic

Watch at YouTube

That's a 4020 or 4025... I forget which. Granted, it is on 12s and probably 650kv (a really powerful little motor).

~Drew

PM  EMAIL  GALLERY  Attn:RR  Quote
03-18-2015 02:57 PM  3 years agoPost 16
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

Pyro 650, outside diameter is 50.8mm, 3Kw peak power.

Scorpion HKIII-4020-890 is 49.98, 2.1Kw peak power.

So, yeah, the Pyro 650 is a nice motor. However, the Hacker I bought is also nice, and was $145 new

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-18-2015 03:00 PM  3 years agoPost 17
prototype3a

rrApprentice

Christiansburg,VA

My Posts: All  Forum  Topic

The pyro650 wouldn't work with the available kvs anyway but it just goes to show that a little 4025 can really move a 12s5000 700 heli despite what everyone thinks they know about helis today. Just look at all the people running 4535s on 14s at 2600rpm to get performance similar to Nico's Banshee.

~Drew

PM  EMAIL  GALLERY  Attn:RR  Quote
03-18-2015 06:13 PM  3 years agoPost 18
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

Drew,

I had no doubt that a 4025-890 motor would motivate the e700. I think the flight times would be rather short on 6s unless I ran quite low head-speeds (1100-1400) and/or legit high C-rated and large capacity packs (5100mAH+). My doubt was with the 4020 series.

The Hacker A50 14L V3 that I'm using is marketed as a motor for a 600-size.

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-18-2015 06:25 PM  3 years agoPost 19
prototype3a

rrApprentice

Christiansburg,VA

My Posts: All  Forum  Topic

When I finally get my e700 going, I plan to do some testing on 6s.

My buddy's ultralight 6s 600 gets like 15min flights or something just outrageous. Light+low headspeed == long flights and low power requirements.

~Drew

PM  EMAIL  GALLERY  Attn:RR  Quote
03-18-2015 07:52 PM  3 years agoPost 20
darkfa8

rrElite Veteran

Brick, NJ - USA

My Posts: All  Forum  Topic

Drew,

As always, I look forward to hearing about your results.

- Dan Goldstein
Team Revolectrix

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 1 page 1705 views POST REPLY
Helicopter
e-
Thunder Tiger
Raptor E700 › 6s - How can I make it work?
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Tuesday, May 22 - 3:08 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online