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Old Dec 13, 2011, 09:19 PM
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Hangar 9 Christen Eagle II - 90 Size Electric




I thought we should start a thread for this awesome kit coming from Hangar 9 dedicated to powering it with an electric power system.

The recommended power system is a E-Flite Power 90-325kV, with a 4000 mah 8s LiPo, tuning a 17x8 prop.

I know it's theoretical, however in eCalc it seems to be at the edge of the power systems envelop, with a prop speed of 69 mph. I'm sure this is well enough, and probably close to scale speeds, however I'm thinking of a bigger power system like the Power 110 or Turnigy G110. The G110 models very fast spinning a 16x12 prop! Problem is the G110 is a front mount motor, thus a motor frame mount will be required. I modeled a few Scorpion motors as well, however it seems the E-Flite and Turnigy models better overall.

Anyone interested in this plane, or planning on getting one, please offer your thoughts and or plans for your power system...
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Old Dec 14, 2011, 01:14 AM
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Saito .91 or 1.20 in mine.
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Old Dec 14, 2011, 01:23 AM
This is my Nemesis....
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Quote:
Originally Posted by Scott Morgan View Post
Saito .91 or 1.20 in mine.
Thanks, there is a fuel version thread if you're interested. Here



Hangar 9 Christen Eagle (1 min 39 sec)


I'm guessing this video of it is electric based on it's sound, lack of smoke and no muffler hole in the cowl anywhere.

If this is a Power 90 E-Flite, it moves pretty good.
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Old Dec 14, 2011, 11:18 AM
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I have a Scorpion 4025 running in another airframe producing 1800-1900 watts on 6S 5000. Was thinking of that, but the motor is lighter than the Power 90, and the 6S pack is lighter than the 8S 4400. My only concern is getting it to balance. I think 1800-1900 watts should do the trick though.
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Old Dec 14, 2011, 12:51 PM
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I too have a spare Scorpion 4025-12 440kV, same motor in my Sundowner 50. I'm currently running that on a 8s 12x12 prop, it's measure power is just short of 1700 watts. Unfortunately it would seem his motor isn't great at spinning a prop in the recommended 17" range the Eagle would like

Which particular 4025 do you have?
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Old Dec 14, 2011, 01:08 PM
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I have the 4025-10. On 5S I run either a 16x10 or 17x10, and on 6S used a 16" prop. (Cant recall the pitch this second) Looking at the data sheet for the 4025-10, it looks like you can get near 2000 watts with a 16x8 or 16x10. Seems to me that may be pushing the motor pretty hard. I have this motor in a 3DHS 62" Osiris, which is pretty light compared to the Eagle. The Osiris is over powered both 5S and 6S.

The 4025 series is a few ounces lighter than the Power 90 (2.3 or 3oz I think) My gut tells me the 4025-10 on 6S will be right on the edge for the Eagle. I guess it all depends on what they actually weigh- looking forward to the eary reports.
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Old Dec 15, 2011, 06:53 AM
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I ran it through eCalc last night and the motors are close. I could run my 4025-12 with a 16x8 and the thrust and pitch speed is good, however run time is down around 5 min, with a 6000mah battery, so this tells me the setup isn't very efficient.

The Power 90 while in the same speed range is better suited it would seem.
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Old Dec 15, 2011, 06:25 PM
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What about running one of the Hacker motors? Would one of the A50 offerings be too much for this plane?
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Old Dec 15, 2011, 10:28 PM
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Eflite 110 is great on 8S 18x10 or 18x12. I have not run my 2 with a 17 prop but if you don't have clearance for 18" I'd bet 17x10 or 12 would be fine and use less amps..more flight time. only about 2oz. weight difference in the 90 and the 110 and mount pattern may be the same.
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Old Dec 16, 2011, 12:22 AM
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I have been using the Motrolfly 4325-310 in most of my 8s set ups lately. I think I'm going to shuffle some motors around and use one of those in the Christen Eagle with 4s 3800 packs (x2). This setup is good for over 2000 watts on a Xoar 18x10. I should have plenty of power, even if I have to go with a smaller prop due to ground clearance.

I see that the kit comes with a white spinner. Are the H9 spinners that are in the kits any good? I like the aluminum spinner in the press photos, but I always seem to run into problems finding adapters that work with those styles of spinners. With no local hobby shop it's a pain to find one.
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Old Dec 16, 2011, 06:52 AM
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Quote:
Originally Posted by ptgarcia View Post
What about running one of the Hacker motors? Would one of the A50 offerings be too much for this plane?
I haven't lookesd at the Hackers myself as they are nto readly available to me, that I know of...


Quote:
Originally Posted by Hunkus View Post
Eflite 110 is great on 8S 18x10 or 18x12. I have not run my 2 with a 17 prop but if you don't have clearance for 18" I'd bet 17x10 or 12 would be fine and use less amps..more flight time. only about 2oz. weight difference in the 90 and the 110 and mount pattern may be the same.
I do like the e-Flite 110


Quote:
Originally Posted by G.P. View Post
I have been using the Motrolfly 4325-310 in most of my 8s set ups lately. I think I'm going to shuffle some motors around and use one of those in the Christen Eagle with 4s 3800 packs (x2). This setup is good for over 2000 watts on a Xoar 18x10. I should have plenty of power, even if I have to go with a smaller prop due to ground clearance.

I see that the kit comes with a white spinner. Are the H9 spinners that are in the kits any good? I like the aluminum spinner in the press photos, but I always seem to run into problems finding adapters that work with those styles of spinners. With no local hobby shop it's a pain to find one.
The orange spinner that came with my Sundowner is alright, not as nice as an Eflite Alu spinner though. That one comes with a 5mm and 8mm adapter. Try Ebay, I got mine there.
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Old Dec 16, 2011, 10:00 AM
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Quote:
Originally Posted by ptgarcia View Post
What about running one of the Hacker motors? Would one of the A50 offerings be too much for this plane?
I also thought of that, I was thinking the A50 16S, as I am trying to use a 6S pack- Already have a number of them.
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Old Dec 17, 2011, 12:12 PM
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It will be great once these models arrive and flyers start feeding back how its performing with their choice of power systems.


Power 90 Brushless Outrunner Motor 325Kv

Product Specifications
Type: Brushless outrunner motor
Size: Equivalent to or surpassing the power of a 90-size 2-stroke glow engine
Bearings or Bushings: One 6 x 19 x 6mm Bearing, and One 6 x 15 x 5mm Bearing
Wire Gauge: 13
Recommended Prop Range: 16x8 to 18x8
Voltage: 21.631.2V
RPM/Volt (Kv): 325Kv
Resistance (Ri): .02 ohms
Idle Current (Io): 2.00A @ 10V
Continuous Current: 50A
Maximum Burst Current: 65A (15 sec.)
Cells: 6S8S Li-Po or 1826 Ni-MH/Ni-Cd
Speed Control: 85A High Voltage Brushless
Weight: 450 g (15.8 oz)
Overall Diameter: 56mm (2.20 in)
Shaft Diameter: 6mm (.24 in) (Includes two 10mm threaded prop shaft adapters with 1.5 pitch)
Overall Length: 52mm (2.00 in)


Power 110 Brushless Outrunner Motor, 295Kv

Product Specifications
Type: Brushless outrunner
Size: Equivalent to or surpassing the power of a 1.10 size 2-sroke glow engine
Bearings or Bushings: One 8 x 19 x 6mm Bearing, and Two 8 x 16 x 5mm Bearings
Wire Gauge: 13
Recommended Prop Range: 17x8 to 19x10
Voltage: 28.238.4
RPM/Volt (Kv): 295
Resistance (Ri): .03 ohms
Idle Current (Io): 1.20A @ 10V
Continuous Current: 55A
Maximum Burst Current: 65A (15 sec)
Cells: 2432 Ni-MH/Ni-Cd or 8S9S Li-Po
Speed Control: 85A High Voltage Brushless
Weight: 490 g (17.5 oz)
Overall Diameter: 63mm (2.50 in)
Shaft Diameter: 8mm (.3 in) (Includes two 12mm threaded prop shaft adapters with 1.5 pitch)
Overall Length: 54mm (2.10 in)


At only 2mm longer, the Power 110 should fit the length constraints of the cowl. Diameter it is bigger, but my gut thinks it would fit as well. Unless I get a Turnigy G110, and a frame mount, the Power 110 is out front for me... Thats is until I've looked at the other recommendations here myself.
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Old Dec 17, 2011, 12:24 PM
This is my Nemesis....
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Here at the ecalc models for the motors I've been considering.

The E-Flite 90 is spec'ed as recommended by Hangar 9 for the Eagle II.

For the other motors I have dropped the prop to a 16" to get less issues in the warning sections, and to get a bit more prop speed, thus, hopefully more real world speed.
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Old Dec 18, 2011, 11:23 AM
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ViperZ, I'm not good on computers,etc. Next time your on ecalc thing would you please run Eflite Power 90 on 6S 5000 with 18x10 prop.THANKS,HUNKUS
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