HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old May 25, 2008, 10:16 PM
'FPV'er...not a "LOS'er
Vantasstic's Avatar
Las Vegas, NV
Joined Sep 2003
17,084 Posts
What AXI motor do you have? There's a 2826-08, not no 2086-06 I've heard of. If it's the 2826-08 you'd probably need a 12x6 - 12x8 prop and a 60 ESC on 3S LiPo.
Vantasstic is online now Find More Posts by Vantasstic
RCG Plus Member
Sign up now
to remove ads between posts
Old May 25, 2008, 11:04 PM
Registered User
Jebera's Avatar
Brazil, MG, Belo Horizonte
Joined Oct 2006
465 Posts
Quote:
Originally Posted by Vantasstic
What AXI motor do you have? There's a 2826-08, not no 2086-06 I've heard of. If it's the 2826-08 you'd probably need a 12x6 - 12x8 prop and a 60 ESC on 3S LiPo.

No, it's a 2826/06, 1500kv, something for choppers I think!?

http://www.natterer-modellbau.de/pro...6-08-Gold.html

What now?

Andre.
Jebera is offline Find More Posts by Jebera
Last edited by Jebera; May 25, 2008 at 11:15 PM.
Reply With Quote
Old May 26, 2008, 12:03 AM
'FPV'er...not a "LOS'er
Vantasstic's Avatar
Las Vegas, NV
Joined Sep 2003
17,084 Posts
Okay, 2826-06 then. I can't give you exact recommendations. I've read of several people using the 2826-08 on 3S with 13x6 props in the 60-70 amp range. Since the -06 is higher kV I'd say a 12x6 prop on 3S would be about right. For that setup I'd recommend a 70-80 amp ESC. You wouldn't be on the throttle long before your plane is specked out.
Vantasstic is online now Find More Posts by Vantasstic
RCG Plus Member
Old May 26, 2008, 12:20 AM
The frigin Catalina wine mixer
flightmare's Avatar
USA, CA, Buena Park
Joined Oct 2006
599 Posts
Andre
2826/08,10,or 12 is the only three configurations I know of for Axi..Are you referring to the KMS Quantum 2826/06,if so,The numbers are the same as the
Axi 2826/12..


Diameter: 35 mm
Length: 54 mm
Stator Size: 28 x 26 mm
NiCd/NiMH cells: 10-18
LiPo Cells: 3-5
IO Amps: 1.5 (10v)
Turns: 6
KV/RPM: 730
Max Cont Current: 25a
Max Current: 40a/60s
Max Efficiency: >86%
Resistance: 64 mohm
Shaft Dia: 5 mm
Weight: 170 g
Bearings: 3
Poles: 14
ESC Timing Degrees: 20-30 (High)
flightmare is offline Find More Posts by flightmare
Reply With Quote
Old May 26, 2008, 09:57 AM
Registered User
Jebera's Avatar
Brazil, MG, Belo Horizonte
Joined Oct 2006
465 Posts
It's an AXI!

Quote:
Originally Posted by flightmare
Andre
2826/08,10,or 12 is the only three configurations I know of for Axi..Are you referring to the KMS Quantum 2826/06,if so,The numbers are the same as the
Axi 2826/12..


Diameter: 35 mm
Length: 54 mm
Stator Size: 28 x 26 mm
NiCd/NiMH cells: 10-18
LiPo Cells: 3-5
IO Amps: 1.5 (10v)
Turns: 6
KV/RPM: 730
Max Cont Current: 25a
Max Current: 40a/60s
Max Efficiency: >86%
Resistance: 64 mohm
Shaft Dia: 5 mm
Weight: 170 g
Bearings: 3
Poles: 14
ESC Timing Degrees: 20-30 (High)


Hi guys!

It's an AXI!
My friend bougth it in germany for me, it's an 1500kv so in a 3S it would turn in arround 17000 tpm!?

And the nigthmare is that the Aero-Naut cam props are recomended for 12000 tpm, what now?

Greetings!

André
Jebera is offline Find More Posts by Jebera
Reply With Quote
Old May 26, 2008, 11:33 AM
Registered User
Germany
Joined Jan 2007
71 Posts
Quote:
Originally Posted by Jebera
Hi guys!

It's an AXI!
My friend bougth it in germany for me, it's an 1500kv so in a 3S it would turn in arround 17000 tpm!?

And the nigthmare is that the Aero-Naut cam props are recomended for 12000 tpm, what now?

Greetings!

André
Hello ANdre,

the 17krpm is only a calculated value without any load, so with a prop its more less.
Calculating the setup with Drivecalc, there is a solution for a 10x7 Aerocam with Static Thrust at about 2400gramm(85oz), speed about 100km/h(62Miles), RPM ca 12000, but this setup need a powerful setup for controller and battery, it pulls about 65A, this is the maximum for the motor and ONLY for maximum 30seconds. Perhaps the best is you download the drivecalc (www.drivecalc.de, also available in english) and so you can check different kinds of combinations.

Edit: perhaps you can also calculate some combinations with a 2cell Lipo and a bigger prop size, so there is also a chance to use 2S/2P battery combination
rgds
Wolfgang
fwolf15 is offline Find More Posts by fwolf15
Last edited by fwolf15; May 26, 2008 at 11:47 AM.
Reply With Quote
Old May 26, 2008, 01:17 PM
'FPV'er...not a "LOS'er
Vantasstic's Avatar
Las Vegas, NV
Joined Sep 2003
17,084 Posts
Good recommendation fwold15. The higher kV motor on 2S would keep the rpms and amp draws lower. Perhaps a 13-6, or bigger, would be a good choice on 2S.
Vantasstic is online now Find More Posts by Vantasstic
RCG Plus Member
Old May 26, 2008, 01:32 PM
Registered User
Germany
Joined Jan 2007
71 Posts
Quote:
Originally Posted by Vantasstic
Good recommendation fwold15. The higher kV motor on 2S would keep the rpms and amp draws lower. Perhaps a 13-6, or bigger, would be a good choice on 2S.

with a 13x6,5 Aerocarbon you've got static thrust at about 60oz, at a speed of 60km/h, so its not so fast, but it will draw about 58A, so I recommend a prop like a 12,5x10, Thrust is about 70 oz, speed nearly 100km/h, and power consumption is 56A. It depends on the better eta for this combination.
edit: both on 2S config
Wolf
fwolf15 is offline Find More Posts by fwolf15
Last edited by fwolf15; May 26, 2008 at 02:03 PM.
Reply With Quote
Old May 26, 2008, 08:26 PM
Registered User
Jebera's Avatar
Brazil, MG, Belo Horizonte
Joined Oct 2006
465 Posts
No shi...

Hi guys!
Grat advices! thanks a lot!

The shi... is that i already spent some hundred bucks on 3s lipos, and what if I use 3/4 throtle?

Hapy landings!
Jebera is offline Find More Posts by Jebera
Reply With Quote
Old May 26, 2008, 10:13 PM
'FPV'er...not a "LOS'er
Vantasstic's Avatar
Las Vegas, NV
Joined Sep 2003
17,084 Posts
Quote:
Originally Posted by Jebera
what if I use 3/4 throtle?
That's a mistake a lot of people make.
ESC101:
a). The ESC turns current on and off to the motor, it DOES NOT adjust how much voltage the motor is given.
b). The ESC ALWAYS passes max current...no matter what the throttle setting is the on. The difference is the on/off time. For arguments sake, let's say at full throttle the motor receives full power 100 percent of the time. At 3/4 throttle the ESC is on 75% on 75% of the time and off 25%. At 1/2 throttle the ESC is on 50% and off 50%. No matter how long the ESC is on IT IS passing full current. Amp meters average the amount of on/off time for a given period and display that amperage. So at full throttle you have, say, 40amps, at 3/4 the amp meter reads 30amps, 1/2 throttle 20 amps, etc.
c). Always make sure your FULL system is matched for the current delivered. A 25 amp ESC will be stressed in a system that draws 30 amps full throttle. Just reducing the throttle setting does not allow less amps through the ESC.

If you've got a bunch of 3S batteries then just use a smaller prop (diameter and/or pitch) to keep things in range.
Vantasstic is online now Find More Posts by Vantasstic
RCG Plus Member
Old May 27, 2008, 08:02 AM
Electron Abuser
MTXMUGEN's Avatar
Akron, Ohio
Joined Aug 2006
916 Posts
Quote:
Originally Posted by Vantasstic
That's a mistake a lot of people make.
ESC101:
a). The ESC turns current on and off to the motor, it DOES NOT adjust how much voltage the motor is given.
b). The ESC ALWAYS passes max current...no matter what the throttle setting is the on. The difference is the on/off time. For arguments sake, let's say at full throttle the motor receives full power 100 percent of the time. At 3/4 throttle the ESC is on 75% on 75% of the time and off 25%. At 1/2 throttle the ESC is on 50% and off 50%. No matter how long the ESC is on IT IS passing full current. Amp meters average the amount of on/off time for a given period and display that amperage. So at full throttle you have, say, 40amps, at 3/4 the amp meter reads 30amps, 1/2 throttle 20 amps, etc.
c). Always make sure your FULL system is matched for the current delivered. A 25 amp ESC will be stressed in a system that draws 30 amps full throttle. Just reducing the throttle setting does not allow less amps through the ESC.

If you've got a bunch of 3S batteries then just use a smaller prop (diameter and/or pitch) to keep things in range.

just as a quick add on... 3/4 throttle is actually harder on the esc then full bore. the switching rate is easiest on the ESC at full. this is why many of the E-heli guys including myself run 100% flat line throttle curves on their helis.
MTXMUGEN is offline Find More Posts by MTXMUGEN
Reply With Quote
Old May 27, 2008, 08:07 AM
Electron Abuser
MTXMUGEN's Avatar
Akron, Ohio
Joined Aug 2006
916 Posts
Quote:
Originally Posted by Jebera
Hi guys!
Grat advices! thanks a lot!

The shi... is that i already spent some hundred bucks on 3s lipos, and what if I use 3/4 throtle?

Hapy landings!
you can use 3s lipos. im running 2 TP 2100 3s lipos in parrellel on mine and in reality i could even use a single 2250 20c pack. i'm running a scorpion 3014 wound as a 11 turn parallel DLRK. it pulls in the range of 37 amps full throttle and makes my siren climb vertically at 30-35 mph

BTW: the 3014 kit is around 35$ and its very easy to wind
MTXMUGEN is offline Find More Posts by MTXMUGEN
Reply With Quote
Old Jun 02, 2008, 07:40 PM
Registered User
USA, NC, Raleigh
Joined Nov 2007
71 Posts
Maiden Goes Poorly :(

The moment finally arrived, and it only lasted about 1.4 seconds. I don't know what went wrong. Solid hand launch with about %50 throttle, I may have pulled up too soon because then the thing headed towards the ground from about 15ft and did not respond to any more elevator.

Is there a way to qualitatively describe how fast it needs to be flying to respond to radio inputs? Should I launch with full power (I think it's a pretty powerful motor)?

NOW, how do I fix it!? I have few building skills or experience, and I don't want to spend too much time or $$$ because I'm afriad it may crash again.

Right wing spar broken (I plan to drill it out and insert an aluminum tube), balsa on inner wing portion mushed a bit based on looks (I haven't peeled back too much of the covering yet but I wonder if I can just saturate with CA)?

See attached photos, thanks for the help.
Erik S. is offline Find More Posts by Erik S.
Reply With Quote
Old Jun 02, 2008, 10:53 PM
Electron Abuser
MTXMUGEN's Avatar
Akron, Ohio
Joined Aug 2006
916 Posts
Quote:
Originally Posted by Erik S.
The moment finally arrived, and it only lasted about 1.4 seconds. I don't know what went wrong. Solid hand launch with about %50 throttle, I may have pulled up too soon because then the thing headed towards the ground from about 15ft and did not respond to any more elevator.

Is there a way to qualitatively describe how fast it needs to be flying to respond to radio inputs? Should I launch with full power (I think it's a pretty powerful motor)?

NOW, how do I fix it!? I have few building skills or experience, and I don't want to spend too much time or $$$ because I'm afriad it may crash again.

Right wing spar broken (I plan to drill it out and insert an aluminum tube), balsa on inner wing portion mushed a bit based on looks (I haven't peeled back too much of the covering yet but I wonder if I can just saturate with CA)?

See attached photos, thanks for the help.
Sorry to hear about your not so successful maiden.we all have been there before, its what you do after that counts.

the damage doesn't look that bad though. i would start by peeling back the covering and CA-ing/replacing any broken wood. as far as the wing joiner goes, i would use some square carbon fiber, its lighter and stronger than aluminum. be sure to laterally balance it after the repairs are done, even a small weight difference that far from the center line will be noticeable.

I've found that on launch its best to use full throttle and let it get some altitude before getting on the controls. Its a great flying bird, the repairs will be worth it.
MTXMUGEN is offline Find More Posts by MTXMUGEN
Reply With Quote
Old Jun 03, 2008, 05:40 AM
RIP Ric
Andy W's Avatar
Marietta, GA
Joined Jun 1999
43,312 Posts
Did you perform a test glide first? Have you watched the video in the review? I flew around 400' for 10s from a good throw..
..a
Andy W is offline Find More Posts by Andy W
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Article Great Planes Wright Flyer ARF Review Michael Heer Parkflyers 22 Feb 15, 2010 02:42 PM
Sold Great Planes Siren Hotliner ARF Steve H. Aircraft - Sailplanes (FS/W) 1 Sep 13, 2006 03:28 AM
Sold Great Planes Siren Hotliner Sailplane glide Aircraft - Sailplanes (FS/W) 6 Oct 08, 2005 01:20 AM
Sold Great Planes Siren Hotliner EP ARF 79" (NIB) trw43 Aircraft - Electric - Airplanes (FS/W) 1 Oct 03, 2005 07:20 PM
Great planes siren?? Hotliner or warmliner? argarre Electric Sailplanes 3 Sep 01, 2004 08:16 PM