I feel better building a kit.....I know for a fact my joints will be glued correctly and I can keep it lite. I have not heard from anyone if that is a decent plane or not. What do you 3D experts have to say? I was thinking of the Mountain Models planes. They have a few to choose from. I am always looking for some direction...... :wink:
Let me clearify something......if the wings have a shape...not flat foam....that type of foam plane would interst me. I have tha AC geared brushless laying around and would like to drop into a small 3D plane.
I have the Fat Free Taco for my glow powered 3D but I want something electric.
I don't know the motor you mention, but Radical RC has a plane that looks like an old Ugly Stick. It's a kit, and weighs in the 13 to 14 ounce range. I've seen one built, and it looked good.
For foam there is also the T3D II Wildbeast. It has a foam, but airfoiled wing. It's like an all foam Cap, that will hover on a brushed 370, or so I'm told. I've never seen one with a stock set up in any videos. They are said to be pretty fragile, however.
I second the Attitude. I've got one, and its a great plane. Its very light, the parts all kind of lock together, and it flys really well. On the smaller side, there is the Nemesis, but its meant for much smaller motors, like a pjs 300 or AXI 2208. Very good 3Der though.
Wow...I thought i knew something about electrics......obviously I lot to learn yet. The E Taco will be something I will have to save for! Those Tanic packs are not cheap.
Somebody give me a straight answer please. Are the external can motors like the AXI really all that great? I had an AXI 2820-10 in a plane.....with an 11X7 prop and ten CP 1700 cells....six minutes was all I got out of it. But it did have balls and was a blast to fly!
I kind of feel that a geared brushless is the only way to go with a large prop. Am I right? Or just confused.....
I have a 2808/24 that spins an 11x7 prop really well with a 3 cell Irate 2200. I fly it on my 19oz Attitude. It feels(don't have a stand strong enough to actually test this motor) like its got a 2:1 thrust to weight, and I get close to 20 minutes (only one I timed was 17 min, and I was pushing it harder than usual).
There are geared motors that would probably out perform it, but they are more expensive, louder, and are higher maintainance. The AXI also seems to over heat less than my geared inrunners do, and I've pushed it to 29amps in short bursts. A Hacker b20 15l(what I've been told is a good inrunner equivalent to the 2808/24) would demag at that current.
Maybe if I would have used the Lipos withthe AXI iwould have gotten more time. Right now it is rotting in the bottom of a swamp....I wont get a second chance with that motor. 2808 is one size smaller than the 2820? Hmmmmm .....sounds nice!
The 2814 is inbetween the 2820 and the 2808. I want one(or more) of each. I got a really great price on my 2808 with the HL low price garauntee. It ended up being like 75% of the price of the geared inrunner I was looking at. Had that Cobri gear box been out when I was making up my mind, I might have gone with the inrunner, but I was sick of tearing up gws gearboxes, and I'm glad I got the AXI anyhow.
I wish I was as enthusiastic about the outrunners. To me, they are quiet....and that's where the advantages stop. The adjectives that come to mind for me are heavy, not-so-powerful, can't swing a very big prop for the current draw, etc.
We were discussing the 2814/XX vs the Lehner 1020/15 geared. It weighs 4.6 oz (bare motor) and delivers 110~200 watts (I'm hoping that's watts to the prop..) depending on the prop used, with 11X7 being the largest recommended by HL. My motor/gearbox/prop/prop adapter/esc/wires weighs less than the 2814 does bare and gets at least 250 watts to the prop, 335 watts gross, and will swing a 12X6 APC SF faster than HL claims the 2814 will swing a 11X7 (they don't specify what brand or style).
The AXi might be less expensive, but I'm kinda looking for performance. The Cobri gearbox is not noisy like a GWS is. Maintainence..not sure, spur gears ar $3.50 or so.
As for the B20 15L with the 4:1 planetary gearbox. I have never figured out how that combo got to be so popular. I mounted a B20 18L in a Cobri gearbox and geared it 4.86:1. It spins the same APC 12X6 SF I run on the Lehner 5500 RPM at 17.5 amps, 185 watts. Just perfect for a plane like an Attitude on some 1500 Tanics.
The B20 15L 4:1 struggles with an 11X4.7, and more current draw than the B20 18L set up I have.
So I'm not totally anti-outrunner (I do own a couple of Axi motors) but if you are looking for performance, a properly geared BL motor will do pretty good compared to an outrunner.
I got hooked on outrunners after I started experimenting with cdrom motors. I am pushing 250watts, and have even gone past it(29 amps on a 3 cell Irate 2200) with my 2808. They are all under rated, I'm pretty sure, especially if used in short bursts. The chart for the 2808 doesn't go any higher than 10" props, but I have used a 12x3.8, and only stopped, becasue the current was to high for the tabs of the lipos. The motor could easily handle the prop and the 29 amps it pulled. It came down warm, but I could still stick my finger throught he cooling hole, and touch the stator without pulling away. I wouldn't hesitate to push 35 amps on 3 cells with a 2814, if I knew it would only be used in short bursts, and might even work my way up to 40.
The b2015l 4:1's popularity confuses me too. 4:1 isn't nearly deep enough for 3D. It over heats in 3D applications too. I read somewhere that the extreme team(the guys who fly the Sukois) dropped the 15ls in favor of 2808/24s becasue they could put two packs through back to back without having to wait for the motor to cool like they did with the Hackers.