Extreme Flight 88" Yak - Build and Fly
02-16-2010, 08:23 PM
#9851
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RE: Extreme Flight 88
Hello everyone. I just got an email back from Spektrum. I had asked if the dual battery inputs on their power safe RX's were isolated. Here is the response:
James ,
Thank you for contacting Horizon Hobby Product Support.
Yes they are 2 different circuits.
If you should need further assistance regarding this issue please reply to this e-mail for additional support.
If you need assistance in the future, please feel free to e-mail us at [email protected] or you may also contact us toll-free at 1-877-504-0233.
Make sure to visit our web site at http://www.horizonhobby.com to see all of our new products!
Thank You,
Andrew
Horizon Hobby
Product Support Team
4105 Fieldstone Rd
Champaign IL 61822
1-877-504-0233
James ,
Thank you for contacting Horizon Hobby Product Support.
Yes they are 2 different circuits.
If you should need further assistance regarding this issue please reply to this e-mail for additional support.
If you need assistance in the future, please feel free to e-mail us at [email protected] or you may also contact us toll-free at 1-877-504-0233.
Make sure to visit our web site at http://www.horizonhobby.com to see all of our new products!
Thank You,
Andrew
Horizon Hobby
Product Support Team
4105 Fieldstone Rd
Champaign IL 61822
1-877-504-0233
02-16-2010, 08:43 PM
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RE: Extreme Flight 88
ORIGINAL: JoeAirPort
Jerry you are totally correct as verified by my science experiment. I have a freshly charged WrongWayRC A123 2300 mah 2S pack. I soldered two 1N 5404 diodes in series and measure the voltages at 0.5 and 1 amp load (what my ignition will draw). The results were as you stated. At 1 amp the voltage drop measured by my Fluke 77 went down as it heated up. Back to 0.5 amps and the drop stayed pretty much the same. This setup is pretty much perfect for the RCXEL igntion that needs voltage to stay at or below 6 volts.
0.5 Amp load, 5.17V on battery tester, 0.70V drop per diode.
1 Amp load, 4.90V, 0.754V drop per diode (lowered with time/heat).
http://www.diodes.com/datasheets/ds28007.pdf
ORIGINAL: Gatorb8
Joe,
more food for thought.....
I think it's sort of buried in the data. The V vs I curve shows the diode turning on at .7V (the drop) but thats at a 2% duty cycle. In our application we are running DC (=100% duty cycle) so I think the Tj (junction temp) goes up, there is a graph showing the Ta (ambient temp) versus Current, let's assume Ta=Tj, so then, as it heats up, voltage drop goes down. That's why we see less voltage drop than you would expect by looking at the V vs I curve.
make sense?
http://www.diodes.com/datasheets/ds28002.pdf
more food for thought.....
I think it's sort of buried in the data. The V vs I curve shows the diode turning on at .7V (the drop) but thats at a 2% duty cycle. In our application we are running DC (=100% duty cycle) so I think the Tj (junction temp) goes up, there is a graph showing the Ta (ambient temp) versus Current, let's assume Ta=Tj, so then, as it heats up, voltage drop goes down. That's why we see less voltage drop than you would expect by looking at the V vs I curve.
make sense?
http://www.diodes.com/datasheets/ds28002.pdf
0.5 Amp load, 5.17V on battery tester, 0.70V drop per diode.
1 Amp load, 4.90V, 0.754V drop per diode (lowered with time/heat).
http://www.diodes.com/datasheets/ds28007.pdf
02-16-2010, 08:44 PM
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RE: Extreme Flight 88
Try your sim doing inverted harrier figure 8's, how does left rudder work, I think prop torque and right thrust fight it, or I'm tarded!
Gator,
Your right, there is a significant difference in right and left inverted harrier turns on my Extreme Flight Yak under Real Flight 3.5. What I a noticing is a pronounced nose drop when left rudder is applied. The nose drop does not hapen or is at least a lot less when using right rudder. Does this happen with the real thing as well?
James
02-16-2010, 08:46 PM
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RE: Extreme Flight 88
Charles called me and told me he flew the wing off his buddies Yak......................and landed it! [X(][X(][X(][X(][X(]
We need to chip in and get Charles a video camera!!!
We need to chip in and get Charles a video camera!!!
02-16-2010, 08:48 PM
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RE: Extreme Flight 88
ORIGINAL: lokiyawl
Try your sim doing inverted harrier figure 8's, how does left rudder work, I think prop torque and right thrust fight it, or I'm tarded!
Gator,
Your right, there is a significant difference in right and left inverted harrier turns on my Extreme Flight Yak under Real Flight 3.5. What I a noticing is a pronounced nose drop when left rudder is applied. The nose drop does not hapen or is at least a lot less when using right rudder. Does this happen with the real thing as well?
James
Try your sim doing inverted harrier figure 8's, how does left rudder work, I think prop torque and right thrust fight it, or I'm tarded!
Gator,
Your right, there is a significant difference in right and left inverted harrier turns on my Extreme Flight Yak under Real Flight 3.5. What I a noticing is a pronounced nose drop when left rudder is applied. The nose drop does not hapen or is at least a lot less when using right rudder. Does this happen with the real thing as well?
James
02-16-2010, 09:17 PM
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RE: Extreme Flight 88
ORIGINAL: JoeAirPort
Jerry you are totally correct as verified by my science experiment. I have a freshly charged WrongWayRC A123 2300 mah 2S pack. I soldered two 1N 5404 diodes in series and measure the voltages at 0.5 and 1 amp load (what my ignition will draw). The results were as you stated. At 1 amp the voltage drop measured by my Fluke 77 went down as it heated up. Back to 0.5 amps and the drop stayed pretty much the same. This setup is pretty much perfect for the RCXEL igntion that needs voltage to stay at or below 6 volts.
0.5 Amp load, 5.17V on battery tester, 0.70V drop per diode.
1 Amp load, 4.90V, 0.754V drop per diode (lowered with time/heat).
http://www.diodes.com/datasheets/ds28007.pdf
ORIGINAL: Gatorb8
Joe,
more food for thought.....
I think it's sort of buried in the data. The V vs I curve shows the diode turning on at .7V (the drop) but thats at a 2% duty cycle. In our application we are running DC (=100% duty cycle) so I think the Tj (junction temp) goes up, there is a graph showing the Ta (ambient temp) versus Current, let's assume Ta=Tj, so then, as it heats up, voltage drop goes down. That's why we see less voltage drop than you would expect by looking at the V vs I curve.
make sense?
http://www.diodes.com/datasheets/ds28002.pdf
more food for thought.....
I think it's sort of buried in the data. The V vs I curve shows the diode turning on at .7V (the drop) but thats at a 2% duty cycle. In our application we are running DC (=100% duty cycle) so I think the Tj (junction temp) goes up, there is a graph showing the Ta (ambient temp) versus Current, let's assume Ta=Tj, so then, as it heats up, voltage drop goes down. That's why we see less voltage drop than you would expect by looking at the V vs I curve.
make sense?
http://www.diodes.com/datasheets/ds28002.pdf
0.5 Amp load, 5.17V on battery tester, 0.70V drop per diode.
1 Amp load, 4.90V, 0.754V drop per diode (lowered with time/heat).
http://www.diodes.com/datasheets/ds28007.pdf
You are such a geek!
(I was doing the same thing last night.......)
Gb8
02-16-2010, 09:54 PM
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RE: Extreme Flight 88
You guys liked that diode thingie? Here is another for you.
Plug and play my stabs and when done wings too. Each line only has one JR connector in it and that is at the receiver (power expander in my case). With dual A123 driving my servo's I will get as much power as is possible.
Edit, picts did not take first time.
Plug and play my stabs and when done wings too. Each line only has one JR connector in it and that is at the receiver (power expander in my case). With dual A123 driving my servo's I will get as much power as is possible.
Edit, picts did not take first time.
02-16-2010, 10:00 PM
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RE: Extreme Flight 88
ORIGINAL: diamondave
i dont know, i think in harriers there is all kinds of wacky things going on, with stall, thrust angles, etc....ive had planes with perfect thrust set up, meaning uplines require no rudder input to hold the upline straight, then i do a harrier and it wants to go left all the time? your situation could be something with latteral balance, maybe inverted one wing is heavier and wants to stall quicker than the other? i dont know if there is anyway to get them set up for every type of conditions ya know, if you put wieght on right wing to help your inverted harrier, it may mess up upright harriers...
ORIGINAL: Gatorb8
Nice Dave!
IMHO, electrics will accelerate your thumbs cause you can fly so often (at the park, in your yard) and fly so low!
Below is my electric ''rack''
I do have a question though......
When I get a small electric set up perfect, it will fly upright and inverted harrier in figure eights no problemo!
When I try the same thing with my EF 88 YAK or the simulator, I can do the harrier left and right fine, inverted harrier right rudder is doable but inverted harrier left rudder is very snapppy and very difficult. Is that plane setup or inherent to the Yak???
Nice Dave!
IMHO, electrics will accelerate your thumbs cause you can fly so often (at the park, in your yard) and fly so low!
Below is my electric ''rack''
I do have a question though......
When I get a small electric set up perfect, it will fly upright and inverted harrier in figure eights no problemo!
When I try the same thing with my EF 88 YAK or the simulator, I can do the harrier left and right fine, inverted harrier right rudder is doable but inverted harrier left rudder is very snapppy and very difficult. Is that plane setup or inherent to the Yak???
I really noticed that on my EF Extra EXP since I really can do them well with it.. I can't do inverted harriers to save my life,but on uprights I need to hold some right rudder. I think the "P Factor" has something to do with that ? With the air from the prop going around the fuse and hitting the left side of the rudder .. At slower speeds it must change from higher speed .. Maybe you can use a flight mode and have a touch of rudder when you flick the switch ? I'd rather just hold a bit of rudder myself ...
02-16-2010, 10:10 PM
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RE: Extreme Flight 88
ORIGINAL: Richard D Bahmann aka/Wrongway
You guys liked that diode thingie? Here is another for you.
Plug and play my stabs and when done wings too. Each line only has one JR connector in it and that is at the receiver (power expander in my case). With dual A123 driving my servo's I will get as much power as is possible.
Edit, picts did not take first time.
You guys liked that diode thingie? Here is another for you.
Plug and play my stabs and when done wings too. Each line only has one JR connector in it and that is at the receiver (power expander in my case). With dual A123 driving my servo's I will get as much power as is possible.
Edit, picts did not take first time.
Nice!
02-16-2010, 10:40 PM
#9860
RE: Extreme Flight 88
Richard that is very cool.
Jerry that was so much fun !!!! I'm a total nerd. [8D]
Although I may just stay with 4-cell NiMh on the ignition. That way I can charge both of my batt's at once since the Cell Pro is only a single charger. How do you charge all of your three A123? At one time?
Jerry that was so much fun !!!!
I'm a total nerd. [8D]Although I may just stay with 4-cell NiMh on the ignition. That way I can charge both of my batt's at once since the Cell Pro is only a single charger. How do you charge all of your three A123? At one time?
02-16-2010, 10:56 PM
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RE: Extreme Flight 88
ORIGINAL: JoeAirPort
Richard that is very cool.
Jerry that was so much fun !!!! I'm a total nerd. [8D]
Although I may just stay with 4-cell NiMh on the ignition. That way I can charge both of my batt's at once since the Cell Pro is only a single charger. How do you charge all of your three A123? At one time?
Richard that is very cool.
Jerry that was so much fun !!!!
I'm a total nerd. [8D]Although I may just stay with 4-cell NiMh on the ignition. That way I can charge both of my batt's at once since the Cell Pro is only a single charger. How do you charge all of your three A123? At one time?
02-16-2010, 11:40 PM
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RE: Extreme Flight 88
Gator,
In spirit of overpowering things... (something you probably know something about) what do you think about this motor and ESC for my foamie? (grin)
James
In spirit of overpowering things... (something you probably know something about) what do you think about this motor and ESC for my foamie? (grin)
James
02-16-2010, 11:52 PM
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RE: Extreme Flight 88
ORIGINAL: lokiyawl
Apparently the file size was too large, one last try.. James
Apparently the file size was too large, one last try.. James
[8D]
02-17-2010, 07:46 AM
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RE: Extreme Flight 88
ORIGINAL: Gatorb8
James,
When I take pics for the web, I put the cam on the lowest resolution, looks fine, no fuss.............
James,
When I take pics for the web, I put the cam on the lowest resolution, looks fine, no fuss.............
It's strange because usually the higher resolution photos upload just fine. This last time I got the indication the first two times that the upload was ok but the photos did not show up. I have found that I can reduce the resolution of the photos by pasting into an email and then saving the file. For sure, setting the camera to the lower Res as you suggested would work fine too. James
02-17-2010, 09:09 AM
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RE: Extreme Flight 88
ORIGINAL: xtraflyr
Hey Dave,
I really noticed that on my EF Extra EXP since I really can do them well with it.. I can't do inverted harriers to save my life,but on uprights I need to hold some right rudder. I think the ''P Factor'' has something to do with that ? With the air from the prop going around the fuse and hitting the left side of the rudder .. At slower speeds it must change from higher speed .. Maybe you can use a flight mode and have a touch of rudder when you flick the switch ? I'd rather just hold a bit of rudder myself ...
ORIGINAL: diamondave
i dont know, i think in harriers there is all kinds of wacky things going on, with stall, thrust angles, etc....ive had planes with perfect thrust set up, meaning uplines require no rudder input to hold the upline straight, then i do a harrier and it wants to go left all the time? your situation could be something with latteral balance, maybe inverted one wing is heavier and wants to stall quicker than the other? i dont know if there is anyway to get them set up for every type of conditions ya know, if you put wieght on right wing to help your inverted harrier, it may mess up upright harriers...
ORIGINAL: Gatorb8
Nice Dave!
IMHO, electrics will accelerate your thumbs cause you can fly so often (at the park, in your yard) and fly so low!
Below is my electric ''rack''
I do have a question though......
When I get a small electric set up perfect, it will fly upright and inverted harrier in figure eights no problemo!
When I try the same thing with my EF 88 YAK or the simulator, I can do the harrier left and right fine, inverted harrier right rudder is doable but inverted harrier left rudder is very snapppy and very difficult. Is that plane setup or inherent to the Yak???
Nice Dave!
IMHO, electrics will accelerate your thumbs cause you can fly so often (at the park, in your yard) and fly so low!
Below is my electric ''rack''
I do have a question though......
When I get a small electric set up perfect, it will fly upright and inverted harrier in figure eights no problemo!
When I try the same thing with my EF 88 YAK or the simulator, I can do the harrier left and right fine, inverted harrier right rudder is doable but inverted harrier left rudder is very snapppy and very difficult. Is that plane setup or inherent to the Yak???
I really noticed that on my EF Extra EXP since I really can do them well with it.. I can't do inverted harriers to save my life,but on uprights I need to hold some right rudder. I think the ''P Factor'' has something to do with that ? With the air from the prop going around the fuse and hitting the left side of the rudder .. At slower speeds it must change from higher speed .. Maybe you can use a flight mode and have a touch of rudder when you flick the switch ? I'd rather just hold a bit of rudder myself ...
yeh there is definetly some wierd stuff happening....so far i just try and "fly" it without mixes, some of my imac buddies are really into mixing, like ail and ele with rudder so it wont drop nose with just rudder input, etc....they say it really makes imac sequence easier, i just havent messed around with that kind of stuff yet....but for sure harriers are something that shows wacky stuff..understandably too, the plane isnt supposed to fly that way
02-17-2010, 01:14 PM
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RE: Extreme Flight 88
its funny the only plane that ever did inverted ones easily for me was the original h9 funtana, my buddy had one and said the same thing, not sure what it was about that plane but it took no effort at all, no rock, stear around with rudder and no side effects, was amazing actually, did them better inverted than upright...
02-17-2010, 04:14 PM
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RE: Extreme Flight 88
The rudder to aileron and rudder to elev. on the 12x is easy peasy lemon squeezy...It has it's own page just for that mix ! Inverted Harriers, I really suck at them !! I think I fly it to slow like an upright and it always want to fall off or start spinning !
02-17-2010, 04:19 PM
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RE: Extreme Flight 88
Lokiyawl, look for your batteries in the next day. They are RTF. A couple of cycles and they were getting 975 to 985 on each cycle (normal fo the 1100's), nicely balanced.
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