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Old May 31, 2012, 10:58 PM
Addicted to building...
Freddie B's Avatar
Omaha Nebraska
Joined Feb 2006
5,998 Posts
Stuff of Star Trek and Star Wars, LOL. Too bad I will never live long enough to figure out all this really cool stuff you are doing. I hope one day you get rich selling stuff to the rest of us.

Fred
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Old Jun 01, 2012, 04:52 AM
Micro Jet Pilot
Chris T's Avatar
Joined Jul 2005
2,091 Posts
LOL
I just haven't figured out how to build the flux compensator
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Old Jun 03, 2012, 09:23 PM
Addicted to building...
Freddie B's Avatar
Omaha Nebraska
Joined Feb 2006
5,998 Posts
If you do, I am running for cover LOL!

Fred
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Old Jun 28, 2012, 05:44 PM
Max
Joined Jul 2006
411 Posts
Incredible !
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Old Jun 28, 2012, 05:46 PM
Max
Joined Jul 2006
411 Posts
What materials?

What material will the airframe be build from?
Is there some nanotube-based super-duper-lightweight material you are in possession of ? =)
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Old Jun 29, 2012, 06:16 AM
Micro Jet Pilot
Chris T's Avatar
Joined Jul 2005
2,091 Posts
Hi I plan to build the frame with balsa as usual and might apply some non-woven carbon sheet (4g/m^2) which I got a sample from The thinnest glas available would be too heavy I think.

Now that Germany is out of the championship, I might get back to the topic

Chris
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Old Jun 29, 2012, 06:32 PM
Team30 Micro EDF
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Adelaide, Australia
Joined Apr 2004
11,241 Posts
Well, welcome back Chris!
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Old Jul 09, 2012, 12:09 PM
Some day it will fly... :)
Porto Alegre - RS - Brazil
Joined Apr 2008
18 Posts
Chris,

Are there advantages/disadvantages of using a two phase motor , regarding speed/torque/consumption/... ?

Gabriel
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Old Sep 03, 2012, 12:48 AM
Micro Jet Pilot
Chris T's Avatar
Joined Jul 2005
2,091 Posts
off topic

Hi guys

This is what kept me from working on the jets. My servo development platform

Chris
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Old Sep 03, 2012, 01:55 AM
Team30 Micro EDF
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Adelaide, Australia
Joined Apr 2004
11,241 Posts
zoom! zoom! How small is it Chris?
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Old Sep 03, 2012, 02:03 AM
Micro Jet Pilot
Chris T's Avatar
Joined Jul 2005
2,091 Posts
Hey Dave 500mm span. The ailerons made trouble since the new code made the wings flap too much integral part...
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Old Sep 04, 2012, 08:05 PM
Registered User
Joined Apr 2012
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Quote:
Originally Posted by Chris T View Post
Hi guys

This is what kept me from working on the jets. My servo development platform

Chris
how much do your servos weigh?
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Old Sep 12, 2012, 01:33 AM
Micro Jet Pilot
Chris T's Avatar
Joined Jul 2005
2,091 Posts
Hi minimi,

these servos can be build in almost any size. This version is around .3-.4g.

The glider is going really nice. Waiting for wind now Need to continue with the jet!

Chris
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Old Sep 12, 2012, 10:16 AM
Micro Jet Pilot
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Joined Jul 2005
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... the servo hardware has been the same for years now. The current development is focused in optimizing the code. Lately, I reduced power consumption and acoustic noise. I also put in a integral part in the control loop, but the coefficient wasn't correct yet, so I got problems with stability. I also found, that the wings are much more critical, since they start to resonate driven by the servo. Obviously, I don't have an optimized code that runs under all conditions. That would be the goal though to make a product (maybe open source) out of it. The old code with higher power consumption was stable under all these conditions. So far, I also have to adapt the code for polarity of the coil ( I rather reprogram than resolder). Also for the coarse trim I adapt the code. I have one older code variant with an initialization routine that is triggered by full throw during power up. This routine should also auto detect the correct polarity of the driver pattern in the future so you don't have to take care which way around you attach your coil or glue in the magnet. Many ideas...

Chris
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Old Oct 20, 2012, 01:24 PM
Micro Jet Pilot
Chris T's Avatar
Joined Jul 2005
2,091 Posts
New Motor

Hi guys,

finally, I got back on topic. I tested out to glue coils on a waxed mandrel. It works! This motor is running very stable. I think this is about 95000 rpm. Did a little bit of balancing by chipping of pieces from the hub. Balance did get a lot better but isn't perfect yet. Anyway, I am on the way. Not such a big deal.

10mm EDF running on 95000rpm (0 min 26 sec)





Chris
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