kangaroo II
04-02-2004 | 08:21 AM
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kangaroo II
Hello i have a kanagaroo II with each wing having 2 control surfaces, totaling 4 servos for the wings.
I understand this is a redundancy setup.
I would like to know how do they work ? Are they both evlons or the outer ones are ailerns and the inner are elevators ?
Because of the reduncany what servos should i use ?
I understand this is a redundancy setup.
I would like to know how do they work ? Are they both evlons or the outer ones are ailerns and the inner are elevators ?
Because of the reduncany what servos should i use ?
04-02-2004 | 10:03 AM
#4
RE: kangaroo II
JR 8411s used to be very widely used for the elevons. JR have since released new servos. JR 8321 are going in mine.
To synchronise them properly you will have to either, plug them all into different channels and mix them on your TX or buy a synchroniser such as JR Multibox or Futaba MSA-10 (one for each side). Either that or have amazing mechanical skills.
A lot of people use Y-leads and this seems to work OK. Some manufacturers kits (it has been made by several people) came with only one surface per side. I believe some people have permanently fixed the two together and used a single servo per side (if you're not bothered about the redundancy).
To synchronise them properly you will have to either, plug them all into different channels and mix them on your TX or buy a synchroniser such as JR Multibox or Futaba MSA-10 (one for each side). Either that or have amazing mechanical skills.
A lot of people use Y-leads and this seems to work OK. Some manufacturers kits (it has been made by several people) came with only one surface per side. I believe some people have permanently fixed the two together and used a single servo per side (if you're not bothered about the redundancy).
04-02-2004 | 10:16 AM
#5
My Feedback: (24)
RE: kangaroo II
ORIGINAL: siclick33
JR 8411s used to be very widely used for the elevons. JR have since released new servos. JR 8321 are going in mine.
To synchronise them properly you will have to either, plug them all into different channels and mix them on your TX or buy a synchroniser such as JR Multibox or Futaba MSA-10 (one for each side). Either that or have amazing mechanical skills.
A lot of people use Y-leads and this seems to work OK. Some manufacturers kits (it has been made by several people) came with only one surface per side. I believe some people have permanently fixed the two together and used a single servo per side (if you're not bothered about the redundancy).
JR 8411s used to be very widely used for the elevons. JR have since released new servos. JR 8321 are going in mine.
To synchronise them properly you will have to either, plug them all into different channels and mix them on your TX or buy a synchroniser such as JR Multibox or Futaba MSA-10 (one for each side). Either that or have amazing mechanical skills.
A lot of people use Y-leads and this seems to work OK. Some manufacturers kits (it has been made by several people) came with only one surface per side. I believe some people have permanently fixed the two together and used a single servo per side (if you're not bothered about the redundancy).
I have (4) JR 8411's on my elevons...
Bob
04-02-2004 | 12:07 PM
#6
RE: kangaroo II
Fair point. As an aside I am not using any synchronisers either. I will be using separate channels for each servo, and if I need any adjustment I will do it on the TX.
I accept that small errors will probably be difficult to detect in flight, especially if the errors are 'mirrored' as in your case.
I accept that small errors will probably be difficult to detect in flight, especially if the errors are 'mirrored' as in your case.
04-02-2004 | 12:14 PM
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From: Roseville, CA
RE: kangaroo II
ORIGINAL: bahamadude
Hello i have a kanagaroo II with each wing having 2 control surfaces, totaling 4 servos for the wings.
I understand this is a redundancy setup.
I would like to know how do they work? Are they both elevons or the outer ones are ailerns and the inner are elevators ?
Because of the redundancy what servos should i use ?
Hello i have a kanagaroo II with each wing having 2 control surfaces, totaling 4 servos for the wings.
I understand this is a redundancy setup.
I would like to know how do they work? Are they both elevons or the outer ones are ailerns and the inner are elevators ?
Because of the redundancy what servos should i use ?
The reason there were 4 servos designed into the wing was due to the load placed on the elevons during flight maneuvers; older technology servos could not handle the high stress. If you go with four servos, you'll need a matchbox or other devise, with just two there's no need.
My 2 cents.......
Good luck with yours!
04-02-2004 | 02:09 PM
#8
My Feedback: (24)
RE: kangaroo II
ORIGINAL: warbird_racer
I also have a Roo II, and per the advise of a few of the Roo pro's on here (thanks Todd), I bonded each set of elevons together. I've installed the new JR 8611's in the outer servo bay. The new 8611 produces 260 oz/in of torque, and can definitely handle any stress you can throw at them.
The reason there were 4 servos designed into the wing was due to the load placed on the elevons during flight maneuvers; older technology servos could not handle the high stress. If you go with four servos, you'll need a matchbox or other devise, with just two there's no need.
My 2 cents.......
Good luck with yours!
I also have a Roo II, and per the advise of a few of the Roo pro's on here (thanks Todd), I bonded each set of elevons together. I've installed the new JR 8611's in the outer servo bay. The new 8611 produces 260 oz/in of torque, and can definitely handle any stress you can throw at them.
The reason there were 4 servos designed into the wing was due to the load placed on the elevons during flight maneuvers; older technology servos could not handle the high stress. If you go with four servos, you'll need a matchbox or other devise, with just two there's no need.
My 2 cents.......
Good luck with yours!
Bob
