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Old Aug 08, 2012, 07:16 PM
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Kansas City, MO
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700 Posts
No vids yet????
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Old Aug 08, 2012, 07:57 PM
Oly crap.. Deese ease not gud!
hpapilot's Avatar
USA, NC, Kernersville
Joined Nov 2006
1,160 Posts
Sorry guys, I really don't have anyone to shoot video for me yet. I'll make some film for me when I get to school next week.

RJ
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Old Aug 08, 2012, 09:56 PM
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motorhead's Avatar
Kansas, USA
Joined Sep 1999
3,978 Posts
When RJ and I talked about this plane during the testing phase we discussed setting it up for more power and speed. This is the reason for offering the 1.9lb kit and recommending a larger motor like the 36gr or Hacker A20-34s.
I did some prop testing on these two motors and am surprised and happy with the results. I have always used an 8x4.3 with these motors but it looks like we can prop up a little more with good results.
All testing was on a 3 cell battery. My recommendations are based on short duration full throttle. If you want to fly extended time at full throttle then I recommend propping for 10a max.
Here is what I found:

Base line 2730-1500 with a 8x4.3SF is 500g thrust at 9 amps.

Hacker A20-34s---
Prop Thrust(g) Amps
8x4.3SF 600 12
8x4DD 650 12

8x6SF 600 17
9x4.7SF 700 17
9x5DD 700 17

36gr.-----
Prop Thrust(g) Amps
8x4.3SF 570 12
8x4DD 530 11
8x6SF 550 17
9x4.7SF 700 17
9x5DD 700 15


I still want to try an 8x6DD or speed prop but I need to order them.
Looks like on the Hacker the 8x4DD is a good match and on the 36gr motor the 9x5DD is the best.
Mike
Fancyfoam
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Old Aug 08, 2012, 10:04 PM
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Kansas City, MO
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What prop and battery are you using with the Hacker?
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Old Aug 09, 2012, 10:14 PM
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Kansas City, MO
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Great info Mike. It looks like the Hacker will handle 12 amps in short bursts no problem with the 8 x 4 HD prop. The literature says it's rated at 10 amps.
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Old Aug 10, 2012, 05:33 AM
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Kansas, USA
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It looks that way as I have seen many people run an 8x4.3 on 3s with no problems though not at full throttle all the time. It is rated at 10a so beyond this you are on your own. The 36 gr motor is rated for 15a for 60 sec.
Mike
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Old Aug 10, 2012, 01:56 PM
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Kansas City, MO
Joined Jan 2000
700 Posts
I'm going to try the 3 cells on 8 x 4.3.
BTW, I got several flights on my 42 inch Edge last night and I had not flown it all summer. VERY nice on a Supertigre 10 and 30 amp ESC.!!!! The 42 inch MX2 is gonna be a must have (assuming there is on some day). I love the small ones but the 42 inch are really nice. Love my 42 inch Freestyle too. Great flyers!
Keep 'em coming!!
Now the hard part..coming up with a color scheme for my new MX2.
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Old Aug 10, 2012, 01:58 PM
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Kansas City, MO
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Here is my flat airfoil MX2
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Old Aug 10, 2012, 03:15 PM
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Wichita, KS
Joined Aug 2007
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Nice paint!
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Old Aug 11, 2012, 08:44 AM
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motorhead's Avatar
Kansas, USA
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Very nice Jerry. Yes there are plans for a 42" version.
Mike
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Old Aug 11, 2012, 09:37 AM
Oly crap.. Deese ease not gud!
hpapilot's Avatar
USA, NC, Kernersville
Joined Nov 2006
1,160 Posts
Quote:
Originally Posted by motorhead View Post
Yes there are plans for a 42" version.
*evil laugh*
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Old Aug 11, 2012, 09:43 AM
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Kansas City, MO
Joined Jan 2000
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Thanks A. It's short cuts a paper masks. I suppose it adds a little weight but i fly outdoors most of the time. I tend to like bold colors and patterns but that's just me. I love your airbrush work.
Mike, the big one will be nice!
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Old Aug 11, 2012, 11:22 AM
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Renton, Wa.
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Maidened done and successful. Painted mine yellow with black trim, sorry no px's at this time, so she came out a little heavy, right around 10 oz's. Also added 1 extra carbon stiffener to the tail plus made them all a little longer. At this weight I put a Hyperion 2205-38, 31 grams, on the nose to compensate for the weight. Batteries are Gensace 3s 450's which I cg'ed about a 1/2 inch in front of the aileron servo bay. Used a HS 55 with extra long servo arms for the ailerons, 5 gram servos for the tail section with extra long carbon arms for the elevator, for extra throw. Using a 12 amp esc. I mistakenly threw a 9x4 prop on this morning and did'nt realize it until I was done flying. Flew 4 packs pretty much back to back and nothing blew so I might just keep it on there. I usually fly early mornings to beat the wind so temps were around 60-65 degrees. Really like the way it flies. KE pulls just a little towards the nose, easily flown out, hovers are easy, once again it seems a little top heavy, might try putting the battery under the fuselage instead of on top. I can even get a decent KE spin out of it. One thing I would like to see is a detailed manual of the airfoiled design. The instructions on the site show a flat foamie instruction design. One thing I may have to do is cut away the nose section of the fuselage and center it to the airfoiled wing. Right now it is about 1-2 mm's towards the bottom of the wing which gives the front section of the fuselage/nose section a very slight concave appearance, which may or may not affect anything but if you look closely its there. Flight times are kind of short for now, around 4-5 minutes, haven't looked at the amount of battery usage I used yet. I usually fly low and slow so batts are barely warm when I land so I'm not really concerned. I'll come back and put that in. Hope this helps but am pleased.
Steve
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Old Aug 12, 2012, 10:05 AM
Oly crap.. Deese ease not gud!
hpapilot's Avatar
USA, NC, Kernersville
Joined Nov 2006
1,160 Posts
Glad you enjoyed it Steve!

The battery definitely needs to go on the bottom, the airplane is designed for that configuration. Play with the CG some too, at the proper CG it shouldn't have any coupling in knifeedge at all. Once you find the right spot for the battery, cut a slot in the bottom vertical fuselage for the battery so it doesn't sit to one side of the fuselage, you want it right in the middle.

With the A20-34S and TP 65C 3S 325mah packs, my battery is right behind the aileron servo and the CG seems great there.

RJ
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Old Aug 12, 2012, 10:16 AM
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Renton, Wa.
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Thanks RJ. I'll do that this morning.
Steve
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