700 E Conversion / Batts

[JeromeF]

My 700 will be here over the next few days and the weekend I made the decision to convert to electric as I've never owned a nitro and a little scared haha.

There are quite a few conversion kits on the market and having trouble deciding which is the one for me.

Currently nailed it down to the KDE but want to read more thoughts and hear what people have to say.

As for batts:

2 x 6S 5000mAh Flightmax 30c - really how will these perform? And what sort of flight times would I get and would I be better off with 4000mAh or less?

[GravityKills]

from what I hear, 4000 mAh is too small, especially if you throw it around.
A friend tried it, and the packs didn't last. We both toasted our overpriced Outrage 25 C 5000 mAh packs after not too many flights. Mine died peacefully, but the other guy's pack started to burn while in flight.
I'm now running Hyperion 5000 mAh packs on 12s. They seem to last, but are a bit on the heavy side. The heli has insane power, but doesn't like tictocs etc too much (time will tell, whether the new beveled main gear makes a difference).

If the only reason is that you've never owned a nitro, forget about electric and find someone who helps you with nitro instead. An electric heli in this size is not for the faint-of-heart either.
Nitro is basically plug-and-play. Electric is not, and expect a couple of autorotations with zero warning...

[JeromeF]

How have 5A 30c(ish) been holding up then? Considering Flightmax to start with...

Nitro for me just doesn't do it and I have owned nitro models (cars/buggies just not helis) before and just really didn't get on with them.

I had the first 500 that came into stock in the UK when they arrived. I have had plenty of experince with auto'ing without warning ESC Faliures, Brownouts, Gearstrips etc...

I am prepared to put the time and effort into the 700 and am pretty confident my four years of flying electrics will pay off.

Had two 600Es so not a newbie to the larger side

from what I hear, 4000 mAh is too small, especially if you throw it around.
A friend tried it, and the packs didn't last. We both toasted our overpriced Outrage 25 C 5000 mAh packs after not too many flights. Mine died peacefully, but the other guy's pack started to burn while in flight.
I'm now running Hyperion 5000 mAh packs on 12s. They seem to last, but are a bit on the heavy side. The heli has insane power, but doesn't like tictocs etc too much (time will tell, whether the new beveled main gear makes a difference).

If the only reason is that you've never owned a nitro, forget about electric and find someone who helps you with nitro instead. An electric heli in this size is not for the faint-of-heart either.
Nitro is basically plug-and-play. Electric is not, and expect a couple of autorotations with zero warning...

[JeromeF]

What setup are you running with yours and what problems have you come into?

[Mart61]

Drop a PM to member JohnJ - he has a 700E and I'm sure he could help Jerome.

[GravityKills]

...I am prepared to put the time and effort into the 700 and am pretty confident my four years of flying electrics will pay off.

Had two 600Es so not a newbie to the larger side

OK OK :-)
Don't get me wrong, I love my 700 E, but for me it's been a very expensive "learning experience". Most important, get a motor with low-ish Kv, and increase pinion size to achieve the targeted headspeed (best: Find a motor type that is tried and tested and known to work rock solid). This affects the LiPos indirectly, because the most "LiPo friendly" setup is where you fly 100 % throttle curve, and headspeed bogs slightly under load. With a too high Kv (and / or a too large pinion), it draws crazy peak currents in abrupt moves, and that kills the batteries.

[JeromeF]

I'm so excited that nothing could put me off hehe

I've been looking at the reports with a Scorpion 560Kv and seems the way to go, CC 110HV Phoenix ESC and 5A lipos.

Never ran an electric heli that isn't hitting 100% flat line on the throttle, and have lukcily a very good mate who has made some stunning calculators for brushless setups and finding right pinions etc...


What motor wind and pinion are you running?

OK OK :-)
Don't get me wrong, I love my 700 E, but for me it's been a very expensive "learning experience". Most important, get a motor with low-ish Kv, and increase pinion size to achieve the targeted headspeed (best: Find a motor type that is tried and tested and known to work rock solid). This affects the LiPos indirectly, because the most "LiPo friendly" setup is where you fly 100 % throttle curve, and headspeed bogs slightly under load. With a too high Kv (and / or a too large pinion), it draws crazy peak currents in abrupt moves, and that kills the batteries.

[GravityKills]

I've got a X-Era 4035 2Y with a Kv of 600. It's in my opinion a little bit too fast, but I haven't measured the headspeed lately.

[5exi]

I'm so excited that nothing could put me off hehe

I've been looking at the reports with a Scorpion 560Kv and seems the way to go, CC 110HV Phoenix ESC and 5A lipos.

Never ran an electric heli that isn't hitting 100% flat line on the throttle, and have lukcily a very good mate who has made some stunning calculators for brushless setups and finding right pinions etc...


What motor wind and pinion are you running?

Your not to far off the mark with a scorpion but I'd say go for a 500kv better flight time and still tons of power or a 400kv seem to be having good reports with standard main gears.

I wouldn't run a CC 110 at a 100% though I'm geared. With a 11 pinion. , 115 main gear CC110 in Gov mode at 60% T curve , RPM comes in at 1950 don't for get 2000 your Max on the blades.
If you need to know anything drop me a PM.

Paul

[jamiem]

I'm using 20c 5000mah 6s x2 loongmax tipples, kontronik pyro 510kv + jive 120hv esc, and an 11 tooth pinion. I've still got some fine tuning to do, but its pretty ballistic and the packs are coming of barely warm after a 6 minute thrashing. Very impressed so far!

[pjtyros]

Sorry to but in on this post but what are the views on the conversions available and the costs??
Cheers
Paul

[JeromeF]

Sorry to but in on this post but what are the views on the conversions available and the costs??
Cheers
Paul

Quite a few options out there. This one is interesting and I think I will be going for it.

Cost wise? I don't know yet.

ESC around £200
Motor around £150
Conversion around £150
Batts around £100+ Depending on quality?

[jamiem]

The kde conversion isn't cheap but it is very very good quality, excellent fit, and gives you loads of room for packs. The packs I'm using are £90ish each from concept. I'm keen to try some higher c 4000's out of curiosity to see if the weight difference is noticable, not that it feels heavy as it is!

[JeromeF]

The kde conversion isn't cheap but it is very very good quality, excellent fit, and gives you loads of room for packs. The packs I'm using are £90ish each from concept. I'm keen to try some higher c 4000's out of curiosity to see if the weight difference is noticable, not that it feels heavy as it is!

How many cycles have your lipos had and how they holding up?

£90 + Shipping could get me two 6S 5000mAh 30C Flightmax.

[jamiem]

It's still early days for them, only 4 cycles on them at the moment, but the fact they are coming off about room temperature, the internal resistances are all about equal and less than 2miliohms, and were all perfectly balanced from new leads me to believe I will get good cycle life, but obviously only time will tell!