E-Aurora, progress report.

[MrMel]

Here is my progress of my E-aurora.

(Im currently waiting for a tailcase that was missing in my kit, so I will wait with battery mounting plates so I can see where the CoG will be)

In its current form its a "non-intrusive" conversion, except a few holes its possible to convert back to its original Nitro state.

I might do a "intrusive" version later for better battery placement.


For this version Im planning on doing two battery plates on the side, so I can strap 1 x 6s1p 4500 pack on each side.

Gear-ratio will be 9.9:1 (10T pinion), so 500kv on 12s will be perfect. Im gonna run a Scorpion HK4035-500

http://heli.dacsa.net/aurora/cimg2381.jpg

http://heli.dacsa.net/aurora/cimg2382.jpg
Motor clearance is tight, if needed its easy to grind a way a little of the frame to make it fit though.
Will add "stock" frame spacers to stiffen the frame up since I removed the big CNC block.

http://heli.dacsa.net/aurora/cimg2384.jpg
Home made frame extension in G10, using MA frame spacer to make it stiffer.

http://heli.dacsa.net/aurora/cimg2385.jpg
Motor mount plate is MA Ion-X2 Stock parts, Pinion is MA, Pinion adapter is old MA Ion-X1.5 part, Upper bearing is Stock Aurora.

http://heli.dacsa.net/aurora/cimg2386.jpg
Made slots in the original frame stiffener for motor screws.

http://heli.dacsa.net/aurora/cimg2387.jpg
MA Pinion has the same size as original, so original bearing block fits perfectly.

http://heli.dacsa.net/aurora/cimg2381-Battery.jpg

[LITHIUMSTATIC]

Subscribing :thumbup:

[JASON671]

:shock:

[brgsstm]

what a waste :roll:

[MrMel]

what a waste :roll:

Ok, I'll bite, please let me know why.

Specially since I own 1 x nitro vbar stratus and 1 x electric vbar stratus and I get 25-30% more power in the electric with only 30seconds less runtime...

Aurora being lighter its gonna be one sweet machine to fly, electric.

($52 per gallon fuel dont make it hurt either)

[Laurens]

Shall I report this post so Will will notice this? WILL WAKE UP...

[jody]

Hey Mr Mel that looks like a nice conversion going ahead there I will be interested to see how it goes !

Hey question, when did sweden receive their Auroras?

[fr8brkr]

The E-Aurora looks like a good training tool for my instructors at Erickson Flight Skool ! Nice looking work, look forward to hearing about the flight results. Flybarless will make it even more efficient !

[HFG]

That motor looks so tiny on that frame, DEATH TO NITRO :)

[MrMel]

Hey question, when did sweden receive their Auroras?

I got mine from UK last week, thursday to be exact.

That motor looks so tiny on that frame, DEATH TO NITRO

Dont let the size fool you, I would guess with a modest 85% efficency, around 3800watt out on the head.
or a whopping 5 horsepower.

[Gmoney]

Big Balls man! I love it Buy the latest and greatest helo (most are still waiting to get one) cut it up and make it BETTER... You FN Rock...

Gmoney

[JKos]

MrMel,
My e-Avant was a blast. I have no no doubt you will be quite pleased with the results on this conversion.

What I did for the bottom plate/stiffener was make a small aluminum block which basically replaced the bottom of the motor mount block so I could use the stock bottom plate. That kept the frame nice and stiff down there. I can see some possible flex with your method above.

Keep up the good work!

- John

[MrMel]

Im planning on doing the battery mounting plates L shaped, and reach the length of the frame, even if the batteries just need half of it, that will make the whole frame pretty rigid.

[xeispen]

good work man. Looking forward to the progress.:thumbup::smokin:

[WillJames]

:smokin::smokin::smokin::banana

[MrMel]

Ive completed rest of the build + installation of electronics.

I will complete this E-conversion as a guide for those that dont want to chop up their frames (pictures will come later), But I dont like the battery placement, so I will go loose with the cutter.

Im planning on cutting in the following places, then replace the bottom section with a U-Profile out of aluminum, connecting frame and landinggear to each other, on that U (upside down U)

I will put a plate where I can place the batteries directly on, sliding them under the motor.
(Happens to be exactly how my E-stratus is designed by default)

where to cut:

(if needed its easy to add frame stiffeners behind the back landing gear, and from behind motor down to front, not sure its needed since it should only support the load of the batteries, no vibrations..)

http://heli.dacsa.net/aurora/framecut.jpg

Benefits of doing that kind of battery mounting is,
Better protection in crashes + you can use "taped-together" packs, two 6s1p side by side, where you tape together and no risk of connecting wrong, forgetting to charge one etc.

[MrMel]

Some updated pictures, including some mockup plates on the side to mount the batteries on:

OBS OBS OBS, if you do this, DO NOT FORGET TO COVER THE EDGES OF THE BATTERY PLATES, ELSE YOU CAN LOOSE THE WHOLE HELI WHEN BATTERIES FLY UP INTO THE BLADES!

Dont ask how I know. :rolleyes:

(and yep, no screws in the servos, havent done radio programming yet...)

http://heli.dacsa.net/aurora/CIMG2433.JPG

http://heli.dacsa.net/aurora/CIMG2434.JPG

http://heli.dacsa.net/aurora/CIMG2435.JPG

[MrMel]

Canopy cleared waiting to dry.
Using my "Beam-E4 theme"

http://heli.dacsa.net/aurora/CIMG2438.JPG

[Hulley]

Something wicked is coming this way! :Bang

[MrMel]

Some pictures of the finalized product, phase 1 :)

http://heli.dacsa.net/aurora/CIMG2439.JPG

http://heli.dacsa.net/aurora/CIMG2440.JPG

http://heli.dacsa.net/aurora/CIMG2441.JPG

http://heli.dacsa.net/aurora/CIMG2442.JPG

http://heli.dacsa.net/aurora/CIMG2443.JPG


Gonna start working on Phase 2 with modified frame, gonna test fly this first :)

[MrMel]

Maiden flight completed!

http://heli.dacsa.net/e-aurora/EAurora-2008-06-14.wmv

27MB file.

(gonna see if I can find a US server that is faster for you guys "over there")

[Finless]

Very interesting! Looked pretty good to me but I would agree a higher head speed looks like it would set this sucker off!

What are the flight times and motor temp if you know?

Bob

[MrMel]

at those headspeeds, 6+ minutes....

Depends mostly on blades (and collective management), with Radix stickbangers, always 6 min.
With Maniacs around 5.30.
In the video, VBlades 690 "slicks", around 5.45 with those I would guess.

Motor temp is under debate ;)
Scorpion coming out with a V2 version for this motor already after first batch, probably since I reported it ran hot for my flight since I got it.
So mine is running fairly hot (85C), but there is a mod to do, and as I say, v2 will probably be out before it even hit the US market.

[rotorhead58d]

mrmel, that's incredible. will you be coming out with a kit? lol

[MrMel]

Welcome, E-Aurora v2

Now we have ventured into the lands of "no turning back"
(well, buy new frames and you can go back)

Shaving off another 100grams from the original setup.

http://heli.dacsa.net/aurora/CIMG2448.JPG

http://heli.dacsa.net/aurora/CIMG2449.JPG

with Desire Power 12s1p (2 x 6s) 4500
http://heli.dacsa.net/aurora/CIMG2450.JPG

If you want stiffer frames with this setup, just go from behind the motor to the rear landning-gear, however rememeber, there is no vibrations, its just gonna hold the batteries...