Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Electric set up Help

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Old 11-21-2009, 10:02 AM
  #1  
phjoker
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Default Electric set up Help

I haven't posted in this forum in along time . Basically since I have been flying turbines lately.. Sorry revver brothers, but I have been to the other side and I LOVE it...hehehe. Don't get me wrong I still have my Jett90LX on my minnow and one on my Cermark F-16 so I do still have prop planes.

I am working on Angels Rifle that I have had for a little over a year Sorry Angel forgive me it's been on the way way back burner lately.

Well I want to make it Electric!!!!! yea yea I know I know. Well the problem is I realy don't know I don't know anything about electric motors or bec's or whats size battery to do what. I know nothing. It seems My club is going to be hosting a 2 day electric only fun fly in the summer and I don't have anything electric so this is my chance to get one going. So basically what you guys tell me to get is what I am going to get. So I am putting my trust and hard earned money in what you say.

Come out help out a Revver brother
Thanks Guys
Pete H
still REVVR BROTHER 157
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Old 11-21-2009, 11:22 AM
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Mike Connor
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Default RE: Electric set up Help

It has a lot to do with what type of performance you want, what you are willing to spend and what will fit. Since it has a firewall you could use an outrunner or inrunner. Would a 6.5" x 1.3" x 1.9" battery fit and leave room for ESC and other equipment. The motors are fairly cheap but the batteries and ESC start to run the price up. You will also need a special charger, watt meter and other stuff that is not cheap. I paid $130 for the battery charger and it was a good low end LiPo charger/balancer.

Edit - Electric is not worthwhile for a one weekend project
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Old 11-21-2009, 12:50 PM
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phjoker
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Default RE: Electric set up Help

Completely understand about the money.. The money is not too much of an issue at the moment.
Chargers I am ok with the ones I have for my Jet Ecu Batteries will do lipos with no problems.
As far as performance. well I want it to perform...
There is some room inside for batteries.
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Old 11-21-2009, 02:08 PM
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Mike Connor
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Default RE: Electric set up Help

I am fairly new to electrics but if I was going to do it I would probably try what many are putting in the 2.75 - 3.5 lb flying wings hitting speeds of 130 to 160 mph. A 28 mm HET 2w-23 2850 KVA motor (or similar) for about $65. A CC ICE 100 ESC (built in BEC) for about $120 and a 4S 4000mAh battery that can be had for as little as $49 at HobbyKing and go up to well over $100 each. This will spin a 5.25" thru 6" diameter prop in the 33,000+ range.

This is just one of many ways it could be done.
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Old 11-21-2009, 04:13 PM
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Default RE: Electric set up Help

if you are serious about reliability, i would use a discrete BEC, trying to go fast oten puts the esc at risk, and if you use its bec your going to be t*ts up if it smokes on you, we had this happen at our local field, delta hit a truck etc etc, esc let all the magic smoke out[>:]
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Old 11-21-2009, 05:21 PM
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Mike Connor
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Default RE: Electric set up Help

CC thinks a ot of their new Phoenix ICE ESC and says:
"Phoenix Ice brings the ability to run at input voltages of up to 8S* (33.6) and use the built in switching BEC to output up to 5 amps of servo power all the way up to the 8S max*!"
There are many things in a model airplane that could fail causing an undesirable course. I am hoping the bec will survive if the ESC fails.
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Old 11-21-2009, 11:24 PM
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Default RE: Electric set up Help


ORIGINAL: phjoker

I haven't posted in this forum in along time . Basically since I have been flying turbines lately.. Sorry revver brothers, but I have been to the other side and I LOVE it...hehehe. Don't get me wrong I still have my Jett90LX on my minnow and one on my Cermark F-16 so I do still have prop planes.

I am working on Angels Rifle that I have had for a little over a year Sorry Angel forgive me it's been on the way way back burner lately.

Well I want to make it Electric!!!!! yea yea I know I know. Well the problem is I realy don't know I don't know anything about electric motors or bec's or whats size battery to do what. I know nothing. It seems My club is going to be hosting a 2 day electric only fun fly in the summer and I don't have anything electric so this is my chance to get one going. So basically what you guys tell me to get is what I am going to get. So I am putting my trust and hard earned money in what you say.

Come out help out a Revver brother
Thanks Guys
Pete H
still REVVR BROTHER 157
How much does it weigh?
How fast you looking for?
If you want it real fast 500Watts/lb

watts = volts X amps
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Old 11-22-2009, 11:03 AM
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Default RE: Electric set up Help

if th esc fails the bec is toast, i like the dimension engineering bec, light and cheap...http://www.dimensionengineering.com/, they use switching regs, they dont waste power, the park bec would probably suit your needs
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Old 11-22-2009, 11:32 AM
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Default RE: Electric set up Help

If you are using a high voltage setup, which a lot of high power ESC are they do not have a BEC or are very limited in power. Plus, as many others have pointed out if the ESC fails so does the BEC if it is on board the ESC. You are far better off using a separate/discreet BEC, or receiver battery (depending on weight/room limitations). Castle Creations and several other manufacturers offer stand alone BEC's and I would suggest you seriously look into using one. They can be tied to the main battery pack parallel to the ESC and weigh very little some are programmable and some are high current, either way it is good insurance. Keep in mind the power requirements of your servos, digital servos use a lot more power than standard servos so this to is something you need to consider.
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Old 11-22-2009, 11:35 AM
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ORIGINAL: lfinney

if th esc fails the bec is toast, i like the dimension engineering bec, light and cheap...http://www.dimensionengineering.com/, they use switching regs, they dont waste power, the park bec would probably suit your needs
Yes, mine only runs two mini servos (non digital). Do you run a separate battery on the BEC? The BEC is light but an extra battery is something I do not want to add.
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Old 11-24-2009, 07:05 PM
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Default RE: Electric set up Help

I sent an email to CC support and here is their answer. Just FYI
-
Mike Connor wrote:
Hi,
I have been using the CC ICE 100 ESC on a flying wing with great results. Love the logging feature.

I am using the built in BEC while hooked to a 4S lipo and usually stay well under 100 amps. I am being warned by others that if the ESC fails, so will the BEC. That I should use an external BEC? Is using the built in BEC dangerous and does the BEC fail if the ESC fails?
Thanks,
Mike


It can. It does not necessarily always fail but this is always a possibility. Keep in mind, every other speed controller you own with a linear or switching BEC has this same "problem". For that matter, every other controller on the market that has a BEC does. As long as your setup is under the amperage rating of the controller, and you're not overtaxing the BEC, 99% of the time you're going to be fine. To test your BEC unplug the motor, plug in a freshly charged battery (the one you'll be using in the plane), and exercise all servos simultaneously for 30 seconds. If the servos don't slow to a crawl or stop you should be just fine. The only planes I don't use a BEC on are my pylon planes and my giant scales...both are too costly and will easily kill someone if I hit them...the latter being the more important. Let me know if you have any other questions Mike. I'm happy to help.

Joe Ford
Product Specialist
Castle Creations
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Old 11-24-2009, 08:24 PM
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Default RE: Electric set up Help

My Neocat on 6S with a Scorpion 4025-12. Turnigy Plush 80amp ESC with switching BEC ($50). It has 6 servos in it, and a carp load of flights with zero issues. 1,900 watts at around 70 amps with an APC 12x12.
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Old 02-11-2010, 08:21 PM
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ORIGINAL: Sessholvlaru

My Neocat on 6S with a Scorpion 4025-12. Turnigy Plush 80amp ESC with switching BEC ($50). It has 6 servos in it, and a carp load of flights with zero issues. 1,900 watts at around 70 amps with an APC 12x12.
I probably missed it somewhere, but what kind of speed did this setup provide?
How hot does the motor and ESC get?
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Old 02-11-2010, 08:30 PM
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Default RE: Electric set up Help

Performance with this setup is awesome. Unlimited vertical, guesstimate at level speed would be maybe 110mph...would probably be considerably faster with new, higher C batteries then what I have in it. 1,900 watts at 7 pounds, you do the math. The motor and ESC barely get warm (and the ESC has absolutely no cooling as it is in the fuse). Motor is rated at 2,200 watts but you can't fit a bigger prop on it (I run a 12x12), which is why things stay cool. About 60 amps on the 80 amp ESC. Hope this helps. I will be flying again once it warms up, I may try to get some video. -Chris
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Old 02-11-2010, 08:34 PM
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Default RE: Electric set up Help

BUY A VERY LONG EXTENTION CORD
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