HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Jul 05, 2008, 06:15 PM
Registered User
cappaj1's Avatar
Rochester, NY
Joined Jun 2008
212 Posts
Discussion
Starting out and may go electric - need answers please!!

I put together a list of all the stuff I need to start flying a trainer with a OS Max 46 AX engine( see http://www.rcgroups.com/forums/showthread.php?t=888985 ).

If I go electric instead of glo fuel, I can take off my list the engine, glow starter/glo charger/glo battery leads, fuel, fuel pump, engine starter, starter pack, glo plug, glo plug wrench, fuel line, and fuel filter - about $275 worth of stuff.

What do I need to put in the plane to go electric and get about the same power as the 46AX would give? With quality components.

Thanks.
cappaj1 is offline Find More Posts by cappaj1
Reply With Quote
Sign up now
to remove ads between posts
Old Jul 05, 2008, 06:58 PM
Registered User
Canada, eh?
Joined Jan 2008
175 Posts
Basically you will need:
1. Motor. A brushless outrunner of good quality. This turns the prop. AXi motors are good from what I've read. Great Planes motors are cheaper but I don't know what the quality is like.
2. ESC. This controls the motor. Get one with at least the recommended amp rating for your motor. Castle Creations is a popular brand. Jeti makes good controllers but they aren't as popular.
3. Battery. Pretty much everyone uses LiPo. LiPo batteries pack a lot of power into a small space and light weight. Take note of recommended amp and volt ratings. The more mAh, the more 'fuel' but the heavier and larger it will be. There are basically two categories of quality: the cheap and the good. The cheap generally delivers similar performance but the general quality isn't as good.
Don't forget a good propeller. GWS propellers are infamous for flexing at high speed. APC props are widely regarded as very good propellers. You also need connectors. For the motor to ESC connection normally bullet connectors are used. For battery to ESC you have a lot of options. Most common are Deans Ultra connectors but Anderson PowerPole (aka Sermos) connectors are also popular. Make sure they can handle the amp draw. You'll also need some way to mount the motor. For a brushless outrunner you'll need what is called a radial mount. It allows you to mount your motor 'backwards' so that it will be in front of a firewall or other mounting surface. You can use spacers, a raised deck, or a full-blown premade mount to attach your motor.

Links:

Tower Hobbies Electric Flight: http://www.towerhobbies.com/electric/
Hobby-Lobby (not the craft store): http://www.hobby-lobby.com/
newblet27 is offline Find More Posts by newblet27
Reply With Quote
Old Jul 05, 2008, 07:35 PM
Registered User
United States, PA, Union
Joined Sep 2007
202 Posts
cappaj1,

Powering that plane with electric would likely set you back considerably more than 275 dollars. Because it weighs 5.5 to 6 Lbs. it would require a larger electric motor and high amp ESC as well as an rx battery pack and probably at least a 4 cell 3200 mah lipo to power it. Also, you would need a charger with the capacity to charge and balance that size lipo battery.

For good quality components to electrify that plane, I'd say you will probably be spending in the $400-$450 range.

If you want to go electric, check out some of the trainers that are designed for electric. They will be smaller and lighter (38 to 50 inch,and 1 to 2 lb) and require less powerful motor systems, hence, lower cost.

Curt
curly56 is offline Find More Posts by curly56
Last edited by curly56; Jul 05, 2008 at 08:01 PM. Reason: added info.
Reply With Quote
Old Jul 05, 2008, 10:20 PM
Canadian Bacon
flypaper 2's Avatar
Kingston, Canada
Joined Jun 2004
12,740 Posts
Hard to add in the price of a batt. unless you add in the price of glow fuel for the next couple of yrs., to the price of the glow motor. My Himax H 50, which is equivalent to a .46, and speed controller was about 170.00 bucks.

Gord.
flypaper 2 is online now Find More Posts by flypaper 2
Reply With Quote
Old Jul 05, 2008, 10:23 PM
Promoting Model Aviation...
Murocflyer's Avatar
United States, CA, Tehachapi
Joined Nov 2005
24,918 Posts
Anything over 3lbs will cost you more using an electric power system. Plus e-flight planes are typically 20% heavier than their glow twin.

Frank
Murocflyer is offline Find More Posts by Murocflyer
Reply With Quote
Old Jul 05, 2008, 10:29 PM
Deletedfor proving Nauga wrong
Joined Mar 2005
15,855 Posts
You can get a GPSRC.com 5055/B (appx $55 when I got mine) and a Dynam 60 amp ESC. (appx $25 when I got mine) That combo on 4S LiPo using APC 12X5 gives the equivilent power of about a OS 55AX... cheaply.

Then its a matter of finding a good deal on 4S 4000 mah LiPos... Its REALLY hard to find the deal I got when I bought the ones I used. They don't make the 12C rated ones any more (that I can find) You don't NEED 20C when max draw is 8C and average is closer to 5C.

You can have the .40 class plane flying a lot cheaper with electric power than some will lead you to believe... You don't HAVE to get the AXi if you can tollerate a slightly lower efficiency and a little more weight.
The Dynam ESC... don't try pulling 60 amps. It would get a bit hot. (needs a better heat sink and needs thinner or no heat shrink over the heat sink)

****************

And... I have a .90 class e-conversion... weighs within a couple ounces of the glow version and will fly wingtip to wingtip with the glow for the full glow powered plane's fuel tank.

Sorry... e-power does not have to be heavy.
fhhuber506771 is offline Find More Posts by fhhuber506771
Reply With Quote
Old Jul 05, 2008, 10:56 PM
Canadian Bacon
flypaper 2's Avatar
Kingston, Canada
Joined Jun 2004
12,740 Posts
My Twist 3D weighs about the same as the glow version and neck and neck for power. Using E Moli batts here, from Ryobi power packs. 6S2P.3AH. 9 min. run time. 99 bucks for a 5S2P pack from Home Depot.
flypaper 2 is online now Find More Posts by flypaper 2
Reply With Quote
Old Jul 05, 2008, 11:27 PM
Deletedfor proving Nauga wrong
Joined Mar 2005
15,855 Posts
Quote:
Originally Posted by flypaper 2
My Twist 3D weighs about the same as the glow version and neck and neck for power. Using E Moli batts here, from Ryobi power packs. 6S2P.3AH. 9 min. run time. 99 bucks for a 5S2P pack from Home Depot.
I just found where to get the packs for my Sopwith Camel...
fhhuber506771 is offline Find More Posts by fhhuber506771
Reply With Quote
Old Jul 06, 2008, 01:36 AM
old pilot
Ickarusmelt's Avatar
Rapid City SD
Joined Dec 2007
3,822 Posts
Hi Cappaj, and welcome

In general, bigger stuff means bigger bucks. (And consider how glow fuel is $32/gallon and is going up in Aug.)

You said you are starting, and if you have little or no flying experience, the best bet before you invest lots of money is get yourself a good 3ch trainer and learn to fly first (harder than most people think ). In the long run it will save you a bunch of money and frustration. Two important strategies are read lots carefully here incl the stickys, because guys here share oodles of experience, and get yourself a simulator, actually the free download FMS works fine for learning the basics, and practice lots.

Guys here have good recommendations for cheap, durable trainers that are excellent teachers. Made of various types of foam they are easy to fix (which you will have to do no matter what you fly ).

One favorite is the HZSC, which flies like most basic RC planes fly, and I'm so thankful I started with mine. I've busted the poor thing 6 ways to sunday and with fixes it still flies fine. SC was a $160 investment. During the time it takes you to learn to fly a trainer decent, you'll learn way more about what you want to do next. I now have 2.4GHz DX7 system for the long run, Hyperion charger, several different lipos, a couple motors and escs and lots of tools, and now doing SC aileron and (secret ) mods and also have a specific aileron aerobatic trainer (EFlite Mini Ultra Stick) in the box when my thumbs are ready for it. What I got looks like less money than what you have on your starting list.

Whatever you do, go for it Happy flying

Icky
Ickarusmelt is offline Find More Posts by Ickarusmelt
Last edited by Ickarusmelt; Jul 06, 2008 at 02:37 AM.
Reply With Quote
Old Jul 06, 2008, 06:35 AM
Registered User
cappaj1's Avatar
Rochester, NY
Joined Jun 2008
212 Posts
Thanks, guys,

Broken down by item, for electric version of 40 size engine:

179 MOTOR AXI 2826 http://hobby-lobby.com/brushless-axi2826.htm
13.90 MOUNT http://hobby-lobby.com/brushless-axi2826.htm#Mount
102.90 CONTROLLER, electronic speed - Jeti -40 amp with program card http://hobby-lobby.com/jetiblue.htm
139.99ea LIPO PACKS Thunder power 3850 mah 3 cell http://hobby-lobby.com/thunder-power.htm
5.20 PROP, APC 13x8 Electric Flight Prop http://hobby-lobby.com/elecprop.htm

Looks like to go electric, I would need, if I went LiPo with two batteries about $590 and with three batteries about $750 since the motor is 180, mount 14, controller 100, LiPo packs 140 each. And I could fly two or three times in a day without a charge.

That's too much for me!
cappaj1 is offline Find More Posts by cappaj1
Reply With Quote
Old Jul 06, 2008, 07:15 AM
Old Bold Pilot
Stan Richardson's Avatar
Holiday, Fl. USA
Joined Apr 2007
384 Posts
Super Cub

Quote:
Originally Posted by Ickarusmelt
Hi Cappaj, and welcome

In general, bigger stuff means bigger bucks. (And consider how glow fuel is $32/gallon and is going up in Aug.)

You said you are starting, and if you have little or no flying experience, the best bet before you invest lots of money is get yourself a good 3ch trainer and learn to fly first (harder than most people think ). In the long run it will save you a bunch of money and frustration. Two important strategies are read lots carefully here incl the stickys, because guys here share oodles of experience, and get yourself a simulator, actually the free download FMS works fine for learning the basics, and practice lots.

Guys here have good recommendations for cheap, durable trainers that are excellent teachers. Made of various types of foam they are easy to fix (which you will have to do no matter what you fly ).

One favorite is the HZSC, which flies like most basic RC planes fly, and I'm so thankful I started with mine. I've busted the poor thing 6 ways to sunday and with fixes it still flies fine. SC was a $160 investment. During the time it takes you to learn to fly a trainer decent, you'll learn way more about what you want to do next. I now have 2.4GHz DX7 system for the long run, Hyperion charger, several different lipos, a couple motors and escs and lots of tools, and now doing SC aileron and (secret ) mods and also have a specific aileron aerobatic trainer (EFlite Mini Ultra Stick) in the box when my thumbs are ready for it. What I got looks like less money than what you have on your starting list.

Whatever you do, go for it Happy flying

Icky
"Mornin Icky,
I've been reading this beginners questions and all the replies, and am SO glad someone came up with our " beloved" S.C. In my humble opinion the SC is the ideal beginners electric. ($160.00) You can fly it in a small space, slow it down for easy control, it's repairable, and if you are careful and respectful of the area and people around you you can teach yourself, and decide weather or not you need to join a club ( and an instructor) later. Which I highly recommend.
Stan PS how do you make those "smileys" go where you want them?
Stan Richardson is offline Find More Posts by Stan Richardson
Reply With Quote
Old Jul 06, 2008, 07:51 AM
Member 120mph Club
ATIS's Avatar
New Bern, North Carolina, United States
Joined Oct 2004
12,445 Posts
What about using the EFlite Power 32 motor (works great on a 4lb AT-6) with a 4s lipo? The motor runs for $90, the 60 amp Pro ESC run for around $60...its the lipo that kills ya... EVO 25 4s 3700 runs $170.

But if your a beginner the best bet is the SC.
ATIS is offline Find More Posts by ATIS
RCG Plus Member
Latest blog entry: maxford Nieuport 1/5th Scale
Reply With Quote
Old Jul 06, 2008, 09:18 AM
Wandering IT geek
ronin4740's Avatar
United States, NV, Reno
Joined Aug 2005
3,951 Posts
Quote:
Originally Posted by cappaj1
Thanks, guys,

Broken down by item, for electric version of 40 size engine:

179 MOTOR AXI 2826 http://hobby-lobby.com/brushless-axi2826.htm
13.90 MOUNT http://hobby-lobby.com/brushless-axi2826.htm#Mount
102.90 CONTROLLER, electronic speed - Jeti -40 amp with program card http://hobby-lobby.com/jetiblue.htm
139.99ea LIPO PACKS Thunder power 3850 mah 3 cell http://hobby-lobby.com/thunder-power.htm
5.20 PROP, APC 13x8 Electric Flight Prop http://hobby-lobby.com/elecprop.htm

Looks like to go electric, I would need, if I went LiPo with two batteries about $590 and with three batteries about $750 since the motor is 180, mount 14, controller 100, LiPo packs 140 each. And I could fly two or three times in a day without a charge.

That's too much for me!
Cheaper version:

Turnigy TR35-48-B $25.95: http://www.hobbycity.com/hobbycity/s...r_Eq:_AXi_2826

Turnigy Plush 45A ESC $34.95

http://www.hobbycity.com/hobbycity/s...eed_Controller

XCite Battery 3S1P 3000mAh $67.95, 4100mAh $84.95:

http://www.xcitebattery.com/newfrontpage111V.htm

APC 13x8 prop $5.20

Total = $151.05 + shipping.
ronin4740 is offline Find More Posts by ronin4740
Reply With Quote
Old Jul 06, 2008, 09:48 AM
Registered User
cappaj1's Avatar
Rochester, NY
Joined Jun 2008
212 Posts
Quote:
Originally Posted by ronin4740
Cheaper version:

Turnigy TR35-48-B $25.95: http://www.hobbycity.com/hobbycity/s...r_Eq:_AXi_2826

Turnigy Plush 45A ESC $34.95

http://www.hobbycity.com/hobbycity/s...eed_Controller

XCite Battery 3S1P 3000mAh $67.95, 4100mAh $84.95:

http://www.xcitebattery.com/newfrontpage111V.htm

APC 13x8 prop $5.20

Total = $151.05 + shipping.
Thanks! That's alot less money. Just wondering - the saying goes you get what you pay for - what's the disadvantage with these components.
cappaj1 is offline Find More Posts by cappaj1
Reply With Quote
Old Jul 06, 2008, 10:29 AM
Deletedfor proving Nauga wrong
Joined Mar 2005
15,855 Posts
Item # GPS-C3548KV900
Dimensions 35x48mm
Shaft 4.0x19.0mm
Weight 5.8oz
Kv 900
R 0.082
Io. 2.30

35amps safe/ 40 amps burst(20s)
42.5 oz to 88oz.planes
3 lipos 14x7 prop
4 lipos 11x8 prop
5 lipos 11x6 prop
$29.95

WHY pay $95 for the Axi?

http://www.gpsrc.com/store/cart.php?...es+by+Dr.+Kiwi
Dr Kiwi is a highly respected member of RCGroups...

http://www.gpsrc.com/store/cart.php?cat=ESC+Brushless+

The GPS branded ESCs are about 25% less than the Jetis... I didn't get to try a GPS ESC, because when I tried to order one 2.5 years ago the owner of GPSRC called me up and said the ESCs were testing bad and he refused to sell bad ESCs. So I ordered Dynam... because I didn't want to wait and they were cheaper.
Thge Dynam gave good enough service that I didn't bother buying something to replace them. (I still use 6 assorted Dynam ESCs... all are 2.5 yrs or older)

The GPSRC motors have... are giving AS GOOD service as the AXi I have... I have the GPSRC 5055/B and the AXi 4120/18. They are within 1 mm of the same length and dia. The 5055/B is a faster wind. (probably close to a 4120/14)

The GPSRC motors are about 3% heavier than the AXi... (The only "bad thing" I have been able to find in 2.5 years...)

So cappaj1... why pay the AXi / Jeti price for sport models?
fhhuber506771 is offline Find More Posts by fhhuber506771
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion a few question need answers please SuSp3cT Car Talk 0 Mar 24, 2008 02:58 PM
Starting in electric... need help. Fixed Jus10 Parkflyers 7 May 01, 2003 08:05 PM
Just starting out with electric Nuker Parkflyers 20 Mar 14, 2003 08:47 AM
Question Sore subject but I need answers..please SpaKack Micro Helis 4 Feb 26, 2003 02:13 AM