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Old Apr 06, 2004, 01:52 PM
I fly, therefore...
dsBeliever's Avatar
Santa Blah Blah
Joined Dec 2002
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Don't know how you feel about GWS props but here it is with a 1206. A bit more thrust and the amps are still in line.
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Old Apr 06, 2004, 02:07 PM
And You're Not
Timbuktu, Mali (Happy?)
Joined Oct 2002
6,514 Posts
I ran the 350 thru a Whattmeter recently..

GWS 12X6 is the only prop I tried, D gears.

On 3S Etec 1200's it did 11.2 A and 105 Watts Seems like about 4500 RPM..I can check it again, I didn't write the RPM down.

On 3S 850 Tanics it did 12.9 A and 125 Watts. I realize this pack is a bit small, but it was the only other pack I had. Didn't record the RPM.
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Old Apr 06, 2004, 08:33 PM
GW
Shula Who??
GW's Avatar
Guntersville, AL
Joined Aug 2003
932 Posts
Thanks guys.

The 12x 3.8 loks good dsBeliever
I like the 25 oz thrust at just under 9 amps.

I think I can build the 40"Yak (39" acutally ) at 13 ozs with the Razor and the Apogee 830 packs. That would make a killer combo if I could hit the target weight That would bring the wing loading in at just under 5.2 ozs square foot. Sweet!

For lunchtime fun would be that same setup on a 36" Yak at 11.5 ozs. Power to weight like a Space Shuttle booster rocket pulling a reindeer sled.


Another note, The 36" Yak with the Axi 2212/26 is near complete. Need some 1300 packs to fly it, I guess I can slap on the Etec 1200's for testing. I would like to try the Apogee 830's on that setup as well. WOT Amps will be around 11 static( maybe a bit much for that pack) but well within the range of the Apogee 830 pack in normal flight and 3D kickin around. Plus the weight on the Apogee looks to be in the 2 ozs range. Thats the word I hear anyway/


Later
GW

GW
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Old Apr 06, 2004, 08:45 PM
And You're Not
Timbuktu, Mali (Happy?)
Joined Oct 2002
6,514 Posts
Yeah, I fly a Shocked Yak very similar to your design with a Razor 350. It weighs 11.5 oz with Etecs, it's killer with the 850 Tanics (They might be Irates, a buddy made the packs for me..). They handle the 12X6 fine, but I don't dog them like I do the Etecs. I bought some 1500 3S Tanics (I know they are..) to try on the B20 22S powered Yak. Great fun!

P.S. Got the Depron, that worked out great!
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Old Apr 06, 2004, 08:54 PM
GW
Shula Who??
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Guntersville, AL
Joined Aug 2003
932 Posts
Great , Glad ya got it, was gonna send ya an email and confirm.
Thanks for the loaners. Got me another order of 10 sheets going in, so I dont get caught empty again.

The Tanics are suprising cells ( Irates as well) I can see the voltage hang in there even when going over 10C. Impressed I am !

Got to buy me my own Astro WattMeter and quit bumming and borrowing , Any idea where I can find one in stock?


GW
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Old Apr 06, 2004, 09:04 PM
And You're Not
Timbuktu, Mali (Happy?)
Joined Oct 2002
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LOL, no I'm borrowing a buddies!
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Old Apr 06, 2004, 10:11 PM
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United States, CA, Huntington Beach
Joined Oct 2003
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Quote:
Originally posted by gw-ezone
Thanks guys.

Plus the weight on the Apogee looks to be in the 2 ozs range. Thats the word I hear anyway/

Later
GW

GW
Yes, I picked up some apogee 830 this weekend at Toledo (along with my first Axi 2212/34), the Apogee reads 2oz on my scale, and my etec-1200 reads 3 oz. I got 14.5 minutes out of the apogee 830 this morning with an apc 11x3.8 (it was all they had), the new axi, and I was not being kind to it at all. Motor was cool when done, pack was slightly warm.

Pretty good flight time for the size and weight of the battery. Oh yeah this was on one of your very beat up extra330's, so it has been re-hot glued several times and was weighing 13 oz. I am building 2 more right now, so they should be lighter the first time around.

--Scott
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Old Apr 07, 2004, 05:02 AM
veni,vidi, roto volubilis
Happy|Harry's Avatar
Aberdeen, Scotland
Joined Jul 2003
6,972 Posts
scott to get almost 15mins off the pack means your averge discharge was only about 4C(3.3A), this isn't what
i'd call being unkind to a 10C cell .

gw there is a shortage on all astro products just now but All E RC have the 101 (high power version) wattmeter in stock

phil
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Old Apr 08, 2004, 10:42 AM
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SharksTooth's Avatar
United States of America For Which We Stand!
Joined Jan 2004
1,346 Posts
Quote:
Originally posted by gw-ezone
Great , Glad ya got it, was gonna send ya an email and confirm.
Thanks for the loaners. Got me another order of 10 sheets going in, so I dont get caught empty again.

The Tanics are suprising cells ( Irates as well) I can see the voltage hang in there even when going over 10C. Impressed I am !

Got to buy me my own Astro WattMeter and quit bumming and borrowing , Any idea where I can find one in stock?


GW
Hi GW,
Don't know the answer to your question on the whattmeter availablility, but when you find one, take those Tanics and run them FAB for 30 seconds. After about 30 seconds, they will warm up and will actually pick up ***more***. They won't get hot, they just warm up a little.

Those whattmeter's are great tools. I use mine to optimize props and all kinds of things. When you put one together with the thrust stand, you have a true dyno that you can squeeze every bit of performance out of these things. Plus it's FUN! :-)
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Old Apr 11, 2004, 08:15 AM
Registered User
Wooster OH
Joined Oct 2003
841 Posts
Why use a gearbox

With the availablility of direct drive BL (AXI 22??) why use a motor that requires a gearbox. It appears they run the same size props.

It would seem that the extra gears are inefficient.
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Old Apr 11, 2004, 10:30 AM
I fly, therefore...
dsBeliever's Avatar
Santa Blah Blah
Joined Dec 2002
389 Posts
galenm,

Apparently that's not the case, at least according to MotoCalc. I did a little "Bang for Buck" or "Thrust per Amp" comparison between the AXI 2212-34 and the HiMax 2025-4100 geared 6.6:1, both with a 12X3.8 APC prop. The HiMax was the winner by a red hair.

AXI: 19.5 ozs @ 7.3 amps or 2.7 ozs/amp
HiMax: 25.2 ozs @ 8.7 amps or 2.9 ozs/amp

To get that same 25 ozs of thrust with an AXI you'd have to use the 2212-20. But then you'd be pulling 16.3 amps or about 1.5 ozs/amp

Down side to gearbox? The whine. Upside? Use an adapter plate, change a pinion, change a spur and you can have all kinds of gear ratio/prop/motor combos.

All that being said, I STILL want to try an outrunner in something...
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Old Apr 15, 2004, 04:48 PM
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Fairfax. VA
Joined Apr 2004
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Looks good. I'll bet it flies great!!!
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Old Apr 16, 2004, 10:58 PM
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United States, CA, San Jose
Joined Apr 2004
56 Posts
Here is a pic of my Yak. As you can see, i did mine a bit different. This isnt the most recent pic, i can get some more up later. Motor is Himax 5400 with the GWS D-Drive. Flies great.
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Old Apr 17, 2004, 01:06 AM
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United States, CA, San Jose
Joined Apr 2004
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here it is totally complete. well, almost, needs a canopy.
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Old Apr 17, 2004, 01:21 AM
Registered User
Vancouver Island
Joined Nov 2003
438 Posts
Looks great 3d'kid.
Somehow shockingly naked...
Got a couple of tubes in the fuse?
Bet it flies nice.
Let us know.

Griz
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