E640 in the air! :) - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-03-2013, 03:59 PM   #1
Furious Predator
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E640 in the air! :)

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E640 finally did its maiden this past sunday. Had some bumps with programming the Castle ESC and Skookum 540...still need to dial in the skookum as the tail was behaving as if it were in rate mode. I have made some changes I believe will fix the issue.

Running HV hyperion servos on the cyclic with a CC 120amp BEC set for 8.0 volts, stepped down for the tail and RX using separate regulators set to 5.0 Volts.

A BLS 251 on the tail.

640mm Rotor Tech Main Blades, 95mm Rotor Tech tail blades.

twin 3300 6S Thor lipos setup for 12S from the Heli Farm (Thanks Dennis!)

The very first thought I had when the heli got off the ground was "holly crap this thing is smooth!".

No vibrations at all, just like its nitro huffing brother (my N640). Insanely stable and easy to control even without dialing in the Skookum.

The 12S gives it balls of power, 12 degrees pitch climb out and not even bogging down. The ESC only recorded a max output of 85% of its capacity.

It picks up forward speed ridiculously fast, just simply an amazing machine to fly, just like the N640. I wish I had more then two sets of batteries!

I set my timer for 5 minutes and got the lipos down to 20%, I will adjust it to 4:30 just to be on the safe side.

Below is my Century Family photo right before the maiden flight (just in case!). It is wearing the stock blue/silver canopy, which I found blends in very well with the sky! So I have just finished fitting the optional green one.
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Old 07-03-2013, 07:20 PM   #2
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Re: E640 in the air! :)

Nice lookin fleet dude!
Trex 700E V2 DFC upgrade w/Demon 3sx
Trex 600E Pro w/Ar7200bx and KDE 530kv on 12s
Trex 450 Sport V2 w/2010kv Scorpion 6s, Dx7s
Blade 130X
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Old 07-03-2013, 07:44 PM   #3
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Re: E640 in the air! :)

Very nice. I am thinking of replacing my raven .50 with the N640. Is the Preddy in the photo gas or nitro?
Past Prez and Instructor
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Old 07-03-2013, 07:49 PM   #4
Dennis Pedersen
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Re: E640 in the air! :)

That is great news Furious on your E640 and they just keep getting better . I really like my 2 E640's on 12s also.I have about 130 flights on the one and 78 on the other with zero issues .The sky blue canopy scared me several times so I fixed it with some brighter colors on the windscreen and chin of the canopy.As for the more flight packs we can fix that for yah !! Ha Ha Take care
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Synergy 766
Thunder Tiger E700 / Rush 750
Skookum / JR / Savox/Scorpion
Western Robotics/ Spartan
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Old 07-03-2013, 09:17 PM   #5
Furious Predator
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Re: E640 in the air! :)

Thanks guys.

The cost of the fleet has left me in the dog house for an indefinite period of time, but its worth it

The Predator is the Nitro version, it has a YS91SR with the Hatori SB19. I also put Rotor Tech 720mm FAI blades on it for the ultimate hovering auto's. I have clocked that predator with a gps doing 167kph so far

Nothing wrong with the Raven, I had one, and its NX50 brother. Well built robust reliable machines. These Radikal series share those same traits. My N640 has almost 10 hours of flying on it (recorded by the Futaba 750). It is still like new, and has had really no maintenance.
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