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07-05-2009, 11:37 PM
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#1 |
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Uber Contributer
 
Join Date: Jan 2009
Location: Sydney, Australia
Posts: 150
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I'm one rx port short - what do I do?
I'm setting up my first 50cc plane with an AR7000 spektrum rx. I will be using two A123 batteries through two switches. I will be using a Smart-Fly opti kill and thus am using all 7 ch slots in the rx for controls - 5 primary controls plus throttle and kill. This leaves only one port available for power.
What would be the best way to splice in the second rx pack? A Y into the first power lead (yuk!) or into an elevator, aileron or maybe the throttle or kill? Michael. |
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07-06-2009, 12:23 AM
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#2 |
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Your my boy Blue!!!1
Join Date: Jan 2006
Location: Lexington Kentucky U.S.A.
Posts: 4,209
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Re: I'm one rx port short - what do I do?
I would Y into the rudder channel.
__________________
Thanx to The Crew Mike B. Jim Z. Ed J. Jim S. Airman Wheels www.jerseymodeler.com lazertoyz.com |
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07-06-2009, 12:30 AM
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#3 |
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If you can't HUCK it BLING IT!
Join Date: Jan 2006
Location: Just Moved.......Hampton VA
Age: 37
Posts: 9,269
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Re: I'm one rx port short - what do I do?
Always Y into a port you can fly without. The rudder is a good choice. You can fly the plane if for some reason the Y causes the rudder servo to go. Not that I've ever heard of it happening but stranger things have happened.
__________________
Offical Member of Team Caribou Lou "Some people spend an entire lifetime wondering if they made a difference in the world. But the U.S. ARMED FORCES don't have that problem." ...Ronald Reagan |
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07-06-2009, 01:04 AM
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#4 |
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Bad-ass Super Contributer!
Join Date: Feb 2009
Location: Wenatchee WA.
Age: 42
Posts: 445
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Re: I'm one rx port short - what do I do?
why not bind two rx then program the servos
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07-06-2009, 01:24 AM
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#5 |
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Your my boy Blue!!!1
Join Date: Jan 2006
Location: Lexington Kentucky U.S.A.
Posts: 4,209
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Re: I'm one rx port short - what do I do?
More money and more work to program the servos.
__________________
Thanx to The Crew Mike B. Jim Z. Ed J. Jim S. Airman Wheels www.jerseymodeler.com lazertoyz.com |
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07-06-2009, 01:37 AM
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#6 | ||||||||||||||||||
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Uber Contributer
Join Date: Jan 2009
Location: Sydney, Australia
Posts: 150
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Re: I'm one rx port short - what do I do?
Not realy sure how that would work, but it certainly sounds more complex. Remember this is just a 50cc. would there be any advantage over a single rx? Michael. |
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07-06-2009, 07:31 AM
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#7 |
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Bad-ass Super Contributer!
Join Date: Jan 2009
Location: toledo ohio
Posts: 6,699
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Re: I'm one rx port short - what do I do?
you don't need 2 receivers on that plane the ar7000 is just fine. i put mine on the gear slot with the "y" on opti-kill but rudder would just be fine to like the others suggested,which makes good sense. but i made my "y" so i know it wont fail.
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07-06-2009, 08:53 AM
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#8 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: Tucson
Age: 36
Posts: 5,229
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Re: I'm one rx port short - what do I do?
Y into your ignition kill. It draws the lowest amps.
__________________
Gmoney and Smarks are spooners |
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07-06-2009, 09:35 AM
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#9 |
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Sink Stinks!!
Join Date: Jan 2006
Location: Orange County, CA
Age: 56
Posts: 3,859
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Re: I'm one rx port short - what do I do?
Electrically it does not matter which channel you use to put the Y on. The RX will still see the full voltage of both packs that are connected in parallel. Since the two packs are connected in parallel they will be at the same voltage for that reason.
__________________
Team Futaba I get free Tee shirts, so I must be lying  
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07-06-2009, 09:59 AM
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#10 | ||||||||||||||||||
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Obsessed
Join Date: Jan 2006
Location: Milwaukee, WI
Age: 47
Posts: 5,509
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Re: I'm one rx port short - what do I do?
Plus I'd cut the JR/Futaba plug off the Y and solder on a Dean's Ultra for the battery. I'd also use a HD Y. 20 gauge if available.
__________________
Videos: 88" EF Yak http://www.youtube.com/watch?v=ynkFiYZOS7k 88" EF Yak http://www.youtube.com/watch?v=z1SD21qAJoA 110" EF Yak http://www.youtube.com/user/Vortran?.../5/UyaC9xGFKTk |
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07-06-2009, 10:46 AM
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#11 |
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Sink Stinks!!
Join Date: Jan 2006
Location: Orange County, CA
Age: 56
Posts: 3,859
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Re: I'm one rx port short - what do I do?
Take a look at this photo. It shows a battery connected to a Y and the voltage at two points, 1 on the other half of the Y and the other on the RX buss. The 0.02 volt difference shown is within the accuracy of the little meters I used. I did this to show that connecting a servo to a Y and a battery to the other half does not give you more voltage. And even if the 0.02 volt difference was real (again it is within the accuracy of the instrument/meters) it is not enough to make any difference at all.
Point being that the Y does not effect the voltage. What is connected to the other half does not matter. Both batteries HAVE to be at the same voltage when connected in parallel (Which using a Y does). It's called "Ohm's Law".
__________________
Team Futaba I get free Tee shirts, so I must be lying
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07-06-2009, 10:59 AM
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#12 | ||||||||||||||||||
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Mode 1
 
Join Date: May 2009
Location: Lake Dallas, Tx.
Posts: 34
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Re: I'm one rx port short - what do I do?
Now this is my kind of data! Supported by facts, figures, AND verifiable! (but, I believed you the first time)
Ken W4SWK
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07-06-2009, 11:24 AM
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#13 |
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I'm done!!! Your loss!
Join Date: Jan 2006
Location: TFC
Posts: 3,338
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Re: I'm one rx port short - what do I do?
Y it into your gear port, and be done with it.
__________________
*Insert witty comment here* |
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07-06-2009, 11:28 AM
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#14 |
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Cleaned It !!
Join Date: Apr 2006
Location: Berkeley Springs, WV
Age: 58
Posts: 2,197
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Re: I'm one rx port short - what do I do?
Or you could just run one Rx battery. Been running one A123, 2300mAh for the Rx/servos in my 50cc for well over 200 flights now without a problem.
Earle |
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07-06-2009, 03:03 PM
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#15 |
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Your my boy Blue!!!1
Join Date: Jan 2006
Location: Lexington Kentucky U.S.A.
Posts: 4,209
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Re: I'm one rx port short - what do I do?
If the gear channel is your engine kill switch
I would still use the rudder channel you can fly with no rudder but if you lose your engine you better be close enough for a dead stick.
__________________
Thanx to The Crew Mike B. Jim Z. Ed J. Jim S. Airman Wheels www.jerseymodeler.com lazertoyz.com |
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