Electric Pattern
 

Hi Guys I was wondering if there is any electric motors other than hacker thats is powerful enough and light enough for a competitive 2 meter pattern plane. Thanks. Mark,

RE: Electric Pattern
 

I've been curious about this too. The new AXI motors sold by Hobby Lobby seem to have power similar to the Hackers and are much less expensive. It is a chore to compare electric motors.

Check out the AXI 4130 series. They seem to have about enough power. The 4130-20 will, according to the ad, swing a 16x6 prop at 8360rpm. using 30 cells.

http://www.hobby-lobby.com/brushless_axi.htm

RE: Electric Pattern
 

Hey Bokuda I just got a 4130 16 for a 90 size pattern plane but it will be a couple weeks before I can get it together but I don't know if it would have enough power for a 11lbs plane. Mark,

RE: Electric Pattern
 

The ad says the 4130-20 will power a 12-16 lb plane. I wonder...

I'm seriously thinking of building a 2 meter electric next winter. This motor looks interesting, but I'm waiting to see what others think of it and how it compares to the Hacker 50's.

Will you be running Li-po's with this motor?

What plane are you going to put it in?

Please keep us posted on your progress!

Dave

RE: Electric Pattern
 

Hey Dave I will be putting it in a JR Explorer 90 and I will be running on Li- po's we are working on some hi out put Li-po's should be out in about a month www.depronalaska.com Mark,

RE: Electric Pattern
 

cubdriver
it depends on what you are expecting for a 2M pattern plane. If you already fly a YS140 type of setup and have a lot of power then you will need more than what this spec says. The Hacker C50 is turning a 22x12 at 7000 rpm. I think you can figure that the power output is substantially different from the AXI. If you want to be competitive with glow, then you need a 2400 watt power system. You'll be at around 230 watts per pound to fly with as much authority as glow -- that's large Masters/FAI patterns.

-- Kyle

RE: Electric Pattern
 

Hi all,
I'm testing new AXi engine which have at least same power as HACKER. The engine is with rotation drum and have excellent parameters. I run it at the moment on my F3A SHARK with KOKAM 2000, 10s2p. The power is excellent. For P05 I almost don’t need full power.
Fro more details about AXI - Mr. Pelikan from Model Motors here [email protected]

BR Ales

PS> for more details search RC Universe forum for item SHARK

RE: Electric Pattern
 

My own experiments with outrunner motors are that they work well but eat more amps for the same thrust .
I use a small test stand I made - which reads thrust and also the Whattmeter reads power consumption.
Has anything changed here in the relative power consumption?

RE: Electric Pattern
 

Lehner Motors are comparable to hackers but are even more $$ and hard to get... It's hackers only compeditor as far as I'm concerned..

RE: Electric Pattern
 

Plettenberg is another option:
http://icare-rc.com/plettenberg.htm
Rob and Kyle know what they're talking about. Outrunners are less efficient, but if you have the battery capacity and can properly cool everything, you can use them. The advantage is no gearbox (one less thing to break or maintain). YOu would also need to insure your mount, or nosering, could handle all the loads since you can't support the back of the can (it rotates). Icare-rc will help you investigate the Plettenberg option.
The real question is: What do you want to concentrate on, flying or tinkering? With a Hacker the experimentation has been done for you by TonyF and Jason Schulman. No need to tinker. If you want to be different and tinker a little, then, by all means go ahead.

Disclaimer: I don't own any big electrics, I have just read what others have done.

Terry

RE: Electric Pattern
 

Thanks for all the great info guys keep it coming. I will eventually build a 2 meter electric but for now I am going to 60-90 size till I learn more about this electric stuff.But after flying indoor electrics all winter it is hard to go back to all the hassle and mess of the glow motors. Mark,

RE: Electric Pattern
 

Terry

You indicated that Jason S. and Tony F. have done the experimenting. I've trying to get info on their set ups. Any idea where someone could look to get an idea of their approaches.

Rick Johnson

RE: Electric Pattern
 

Rick,
Both in this forum ("electrfied partner" thread; search JAS-I think for schulman; Dchronkite is also working on an electric F3A) and in rcgroups.com for example:
http://www.rcgroups.com/forums/showt...hlight=shulman
http://www.rcgroups.com/forums/showt...hlight=shulman
New LIPO's will enable you to use 3P and 2p, lowering the cost.

Remember I'm just giving info. This is way too much money for me

Terry

RE: Electric Pattern
 

Both Jason and Tony are using the C50-14XL, 6.7:1, 22x12, 10s3p Lipo setups. I own a much lighter 2M plane called "E-factor" design by a German FAI flyer. My plane runs a C50-13XL, 5.2:1, 19x8, 10s3p. I don't have as much ground clearance as they have so I've geared differently. My plane also only weighs 9lbs all up so I can tolerate the inefficiencies of the smaller prop. These are all 2400 watt systems.

The only caveat about the outrunner is that because it is less efficient, it will tend to get hotter at high power - eg: 5% less efficiency on a 2M plane = 120 watts of heat. Again, it's all a matter of how much performance you're looking for.

-- Kyle

RE: Electric Pattern
 

Kyle,
How do you come up with 2400watts?

10s3p 5700mah @ 10c = 57amps x 42volts = 2394watts??

Is this how its done?

robert

RE: Electric Pattern
 

It's actually in my Partner more like 65 amps at 36 volts under load. 2340 watts. I've been testing recently with an Astro whatmeter.

RE: Electric Pattern
 

Hopefully I'm not out of line by linking to this thread, but this is exactly what I'm talking about. http://www.rcuniverse.com/forum/m_17...tm.htm#1753983

RE: Electric Pattern
 

Robert,
the 10c is the average discharge rate that the new Thunder Power Lipos will support. The burst level though is 15c, so 3p = 85 amps. However, the motor will suck the amps out regardless of the battery's capabilities (up to a point) so you need to measure the draw as Tony has done. My plane draws close to 70amps.

-- Kyle

RE: Electric Pattern
 

The JR Explorer 90 is a good candidate for electric conversion.

Eddie

RE: Electric Pattern
 

Hi Tony,
How many flights do you have on your Partner now? Have you had to change out any of the original set up you started with? Either for a upgrade or a failed component and why. I am interested in electric power for my next pattern project. In advance thank you for your time in these answers.
Scott