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Old Nov 19, 2008, 10:37 AM
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jojoen's Avatar
Norway
Joined Dec 2003
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Lets hope you did not direct it to me either.. I have enjoyed this thread a lot and got some good ideas out of it. Your sharing has been super. I would probably do things different but thats because I would never build that big. And that has to do with funding. If I had the funding and place to build it would be cool to do even bigger just to have done it

Good luck with your next time out

Regards from Norway
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Old Nov 19, 2008, 10:44 AM
Stay in it!!!!
Riverside, California, United States
Joined Aug 2004
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Quote:
Originally Posted by jojoen
Lets hope you did not direct it to me either.. I have enjoyed this thread a lot and got some good ideas out of it. Your sharing has been super. I would probably do things different but thats because I would never build that big. And that has to do with funding. If I had the funding and place to build it would be cool to do even bigger just to have done it

Good luck with your next time out

Regards from Norway
I would love to see it jojoen. Bigger ships will come. I have some plans of my own. Need to get the small one working first.
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Old Nov 19, 2008, 11:09 AM
Detail Freak
target's Avatar
Harbor City, CA
Joined Oct 2003
21,397 Posts
Joe-

I'll let my voltage drop post stand because I was asking a question, not offering a solution.
My brain is thirsty!
Is there a way to use a lipo batter in the wings to provide the actual power to the servos there, but then just get the signal from the RX??

T
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Old Nov 19, 2008, 11:22 AM
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Christchurch, New Zealand
Joined Jun 2006
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Quote:
Originally Posted by target
Joe-

I'll let my voltage drop post stand because I was asking a question, not offering a solution.
My brain is thirsty!
Is there a way to use a lipo batter in the wings to provide the actual power to the servos there, but then just get the signal from the RX??

T
Of course there is... is it worth it? Don't know, but Joe will figure it out if that is a problem.

You could put a BEC/Regulator in the wing and run higher voltage out there.
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Old Nov 19, 2008, 12:34 PM
2012 NZ Speedcup - 231 MPH
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New Zealand, Tasman, Richmond
Joined Mar 2006
1,955 Posts
To be fair, if Joe and his plane has already done 371, surely he:

1. Has a better plane than anyone else at the moment.
2. Is the best pilot at this speed (the only pilot!).
3. Knows at least as much as anyone else about what to do with servos in a DS machine which is nudging 400, and if he does not, knows the people who would know.
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Old Nov 19, 2008, 12:38 PM
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Ward Hagaman's Avatar
San Diego
Joined Mar 2003
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Quote:
Originally Posted by joe manor
I would love to see it jojoen. Bigger ships will come. I have some plans of my own. Need to get the small one working first.
OOOOOOOH--a hint of what's to come? I can't wait!
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Old Nov 19, 2008, 02:47 PM
Stay in it!!!!
Riverside, California, United States
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Quote:
Originally Posted by DownUnderPilot
To be fair, if Joe and his plane has already done 371, surely he:

1. Has a better plane than anyone else at the moment.
2. Is the best pilot at this speed (the only pilot!).
3. Knows at least as much as anyone else about what to do with servos in a DS machine which is nudging 400, and if he does not, knows the people who would know.
Thanks DUP. I must say, any piloting skills I have werent used much the other day. I was just flying some safe lines to see if any issues would come up. Spencer has the most experience in this speed range and is a very well tuned pilot. Part of me wants to get a good 100"er together so we can battle but Im trying to focus more on all out speed. He was doing some awesome flying the other day and I was just cruzing.
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Old Nov 19, 2008, 05:28 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
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Yes I think it's good to concentrate on what you are good at. I always think it's akward when people offer advice (albeit with good intentions) even when you are not actually asking for help.

Best of luck Joe, I'm confident you will get there soon!
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Old Nov 19, 2008, 10:08 PM
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Simi Valley, CA
Joined Apr 2008
29 Posts
Target - something to think about -
"Are you getting a voltage drop at the servos from the long wiring runs??"


Of course bigger wires or higher voltage will help, but there are other tricks to try. I have run quarter scale servos at the end of 14 foot wires and found that a large capacitor (100's to 1000's mfd) across the power leads at the servo helps a lot if the wires are a bit too small. The duty cycle of a servo can be 5% to 10% - it spends 5% of the time moving then 95% waiting for the next signal pulse. The servo can draw power quickly from the capacitor, then it has lots of time to recharge. Also voltage loss in a too small ground wire can fool the signal wire into driving the servo hard over a buffer chip at the servo solves this.
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Old Nov 19, 2008, 10:27 PM
Der Haifisch!! R.I.P.
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Fallbrook, California, United States
Joined Jul 2003
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.184 not too shabby... oops wrong thread
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Old Nov 20, 2008, 09:35 AM
Stay in it!!!!
Riverside, California, United States
Joined Aug 2004
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RD, thats a great point. The problem with my plane is that my servos are under a continuous load. A pretty high one at that. I have contacted Volz. It looks like they have a servo that will do the trick. Lets keep our fingers crossed.
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Old Nov 20, 2008, 09:38 AM
301MPH!
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San Diego, California, United States
Joined Jan 2001
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Quote:
Originally Posted by joe manor
RD, thats a great point. The problem with my plane is that my servos are under a continuous load. A pretty high one at that. I have contacted Volz. It looks like they have a servo that will do the trick. Lets keep our fingers crossed.
I hope they use new gears! The metal gears have too much play for 400mph!
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Old Nov 20, 2008, 11:25 AM
Go fast, turn hard
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Berkshire, England
Joined Aug 2006
1,202 Posts
Joe,
Still reading and still learning. After it is all worked out and you have the time, I would love to read condensed version of the issue and your solution. I think we all would. So many people read this thread because we will never get to dance the cutting edge or push the envelope like you are doing with this series of models. The fact that you are sharing it in public says a lot about your self confidence and tolerence.

My instructor taught me years ago the old adage "Aviate, navigate and communicate" in that order. To date, most of your posting has been past tense. "This is what I did yesterday". Maybe that is the best approach.

I'm sorry if my post kicked off the stuff on the previous page.

Cheers,
Paul
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Old Nov 22, 2008, 03:06 PM
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Tenerife,Canary Islands
Joined May 2004
1,667 Posts
Quote:
Originally Posted by joe manor
RD, thats a great point. The problem with my plane is that my servos are under a continuous load. A pretty high one at that. I have contacted Volz. It looks like they have a servo that will do the trick. Lets keep our fingers crossed.
RD is refering to electronics duty cycle ,even at full power there is time when the electronics power off.It will be worth and easy to try.

Those volz with "steel gears" are awesome thought .

Sorry me ,no one has invited me to this "open " thread
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Old Nov 22, 2008, 03:28 PM
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wakumann's Avatar
Canada
Joined Jul 2003
2,465 Posts
Joe

possible you knows/ investigated this already, if not maybe it's helpful

If Volz can't deliver, these guys may have a servo alternative:

http://www.acteurope.de/html/7_5_volt-servos.html

They work for the Jet guys and fabricated for the industrial market.


Cheers
Thomas
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