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Old Mar 06, 2004, 03:31 PM
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Jeff Charlot's Avatar
San Diego
Joined Jun 2001
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Multiplex cockpit questions.

Hi guys,

Two questions:

1. Is there a way to use a four channel receiver on a plank wing, ie. a Moth?

2. Is there a way to reduce the amount of servo throw per "click" of trim?

Thanks,

Jeff
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Old Mar 07, 2004, 05:05 AM
Professional idiot
Hampshire, UK
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1. I think the Moth uses Elevons? If so then No, but you can cheat. For elevons you technically need Ch 1 & 5. You can however use the V tail mixer (Ch 2 & 3) and change the Mode such that the rudder and aileron sticks are reversed. For example I fly Mode 1 (elevator/rudder left stick and throttle/aileron right stick), by changing to Mode 3 (elevator/aileron left stick and throttle/rudder right stick) I can use the V tail mixer.

2. No, each click is 2% of the travel for that side.

The Cockpit is a nice basic radio but is quite limited. If they gave you too much we wouldn't hanker after the next model up.

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Dave
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Old Mar 07, 2004, 05:58 AM
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Belgium, Flemish Region, Oosterzele
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Quote:
Originally posted by wildpalms


The Cockpit is a nice basic radio but is quite limited. If they gave you too much we wouldn't hanker after the next model up.

--
Dave
You're soo right. The cockpit would be the absolutely perfect radio for me, if (in order of importance)


1) It would let you change/couple channel five,6 or 7 to any channel , the way it lets you couple any channel to channel 7 now(Version2)

2) it had more Timers ( I could however add these myself)

3) it had Model Names instead of Numbers ( I could live with that)

4) I could "loose" the heli soft (room for timers and Model names).

5) it had simple 'flight phases' ( trim alone would be sufficiŽnt). A switchover to another model would be ok too of course.

6) synth + scanner ( I could even live with 2 frequencies+ their channel checks)

It comes sooo very close to being perfect for me that it hurts, especially in view of the problems I have with it's bigger brother,the Evo 9, that still can't do everything I wish and on top of that stopped working yesterday. It's also extremely easy to program with just one button.... (most of these features must be rather easy to add with just software imho)
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Old Mar 07, 2004, 02:00 PM
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Jeff Charlot's Avatar
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Thanks Dave,

I've been through the manual front to back and didn't find the answer I wanted to hear, I was hoping that I simply missed what I was looking for.
You're right, the Cockpit is a GREAT basic radio, I was hoping for just a little more flexibility. I'd love to have more control of the trims, plus, I'd like to be able to use a 4-ch receiver in some of my lighter Deltas.

Thanks for your help Dave, your advice about how to make the Moth work on a 4- channel receiver is ingenious........until you get to the part where I have to learn to fly with my left thumb!

Thanks again for the help, perhaps it's time to do some TX shopping?

Jeff
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Old Mar 07, 2004, 03:24 PM
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The point of changing the Mode is so you don't have to fly the left thumb. You'll fly the way you think you should, just the radio that thinks it is do something different. Easier to try out than to explain. It is ingenious but I got it from here, saved my butt when I wanted to setup my Zagi slope beater on a 4ch RX.

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Dave
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Old Mar 07, 2004, 04:15 PM
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Jeff Charlot's Avatar
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Quote:
Originally posted by wildpalms
You can however use the V tail mixer (Ch 2 & 3) and change the Mode such that the rudder and aileron sticks are reversed. For example I fly Mode 1 (elevator/rudder left stick and throttle/aileron right stick), by changing to Mode 3 (elevator/aileron left stick and throttle/rudder right stick) I can use the V tail mixer.

Dave
Did I miss something? I'm willing to give this a shot, but help me out here. I use a four-channel receiver, servos go in channel 2&3, use the V-tail mixer, select Mode 3, and I can fly on the right stick? Is this correct?

Jeff
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Old Mar 08, 2004, 02:32 AM
BEC
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Look in the manual and find the mode that puts the two controls you want on the stick you want. Then plug the servos into the channels accordingly. For mode 2 flyers I think it's Mode 4.

The other way to do it is to use the combi switch and set it so the aileron is the master and mix it 50%. (again, see the manual). That way you're giving an aileron command but it's coupling in full rudder for the aileron deflection.

But then you have to have the combi switch on or no rudder on your V-tail. This actually is how I did my Gym-E (V-tail but three channels) with a 4 channel GWS receiver on my Cockpit. I read the suggestion about the alternate stick modes here after I'd done it the combi-switch way.

I used a similar approach on one of my Wing-Es (elevons and three channel as well). There the fix later was a 5 channel Rx (FMA M5).

No problem with the Gym-E now that it's on the Evo.....

That said, I have two Cockpit MMs and I really like them!
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Last edited by BEC; Mar 08, 2004 at 02:37 AM.
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Old Mar 08, 2004, 07:36 AM
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Thanks BEC, how did you use a 5-channel receiver for an elevon setup? The same setup discussed above? Or a different way.

Jeff
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Old Mar 08, 2004, 12:14 PM
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Jeff - I hadn't realised you were a single stick flyer. As BEC says try Mode 4. Other than that you've got it. Trying it makes more sense than explaining.

A 5 channel RX solves the problem as the TX uses ch 5 as the second channel for the standard elevon mixer.

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Dave
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Old Mar 08, 2004, 02:39 PM
BEC
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Quote:
Originally posted by Jeff Charlot
Thanks BEC, how did you use a 5-channel receiver for an elevon setup? The same setup discussed above? Or a different way.

Jeff
The Cockpit's second aileron servo for two-servo setups goes in channel 5 (gear is on channel 6). So, one in 1, one in 5, select elevon mix.
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Old Mar 09, 2004, 01:20 AM
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Dave, I'll give it a shot, thanks for the help.

Bec, I just realized I pulled a brain fade when I asked about elevon setup on your wing-E. The wing-E is electric, (hence the "E") So your receiver is getting power from your esc. Sorry for the dumb question, I was still focused on slope use where I'd need to plug the receiver battery into channel 5. I couldn't figure out how you plugged the servo AND the receiver battery into the same slot on your 'slope' wing-E!

Thanks again for the help you guys.

Jeff
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Old Mar 09, 2004, 07:31 AM
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Ron Williams's Avatar
Riverhead NY USA
Joined Dec 2000
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Here's another Cockpit MM question:

How do you tell which system the Cockpit MM is running on? Was there a particular date the switch was made? Connecting the MM to the data manager, how can I determine which system is installed?

Thanks.

Ron
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Old Mar 09, 2004, 01:09 PM
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With version 2 they added a screen with the version.

Turn the radio on and rotate the digi-adjuster to the right a few times. The final screen will say V2.0

If the final screen is the timer screen with stopwatch at the top and total time on the bottom then you still have V1

The other quick way is play with the mixers. If they say 0% then it is V1. V2 changed the 0% to OFF which makes more sense.

The upgrade is worth the effort just for the timer attached to the throttle, well it is if you fly electric
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Old Mar 09, 2004, 01:14 PM
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Jeff - Ideally you should plug the battery into the throttle channel of the RX as this is sometimes buffered. Not sure if this applies to all receivers but certainly some.

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Dave
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Old Mar 09, 2004, 01:27 PM
BEC
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Speaking of versions..... anyone know what's the difference between V2.0 and subsequent ones? I sent a used Cockpit I had purchased second-hand to Hitec to get it checked out and upgraded and it says V2.4. Hitec has no idea what's different, and Multiplex hasn't answered.......
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