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-   -   Help with Jetronic Brake valve (https://www.rcuniverse.com/forum/rc-jets-120/4713768-help-jetronic-brake-valve.html)

turbinepeter 09-05-2006 03:24 PM
Help with Jetronic Brake valve
 
I am trying to sort out my Jetronic brake valve on a SM F15 for theweekend.

I have mixed the brake valve with the Elevator, so when I apply down elevator the Brake valve actuates. Is this correct

What I cant sort out, is to stop the brake valve operating whilst in flight!!!!!!!

I am sure there is a way of switching this mixing off, whilst in flight. But I cannot find anyway of doing this!!!!

I am using a JR PCM 9X mk2.. Could someone please help, as I am supposed to having a maiden flight with this, at the weekend!!


Many Thanks

Peter G

Eric Banner 09-05-2006 03:31 PM
RE: Help with Jetronic Brake valve
 

ORIGINAL: turbinepeter

I am trying to sort out my Jetronic brake valve on a SM F15 for theweekend.

I have mixed the brake valve with the Elevator, so when I apply down elevator the Brake valve actuates. Is this correct

What I cant sort out, is to stop the brake valve operating whilst in flight!!!!!!!

I am sure there is a way of switching this mixing off, whilst in flight. But I cannot find anyway of doing this!!!!

I am using a JR PCM 9X mk2.. Could someone please help, as I am supposed to having a maiden flight with this, at the weekend!!


Many Thanks

Peter G
Hi Peter,
Don't know about JR but with Futaba, just make the brake mix conditional on the retract switch position...
HTH,
Eric

Tim Edwards 09-05-2006 03:51 PM
RE: Help with Jetronic Brake valve
 
Peter
I fly JR 3810 ON AN F15 but I leave the mix on all the tim.As long as the mix only comes in at the extremities of stick movement there should be no air loss.

Tim

turbinepeter 09-05-2006 03:56 PM
RE: Help with Jetronic Brake valve
 
Tim

Thanks

Would it help then, if i played around with the 7 point curve??


making the mixing inactive, between min and max elevator??

Regards

Peter G

bevar 09-05-2006 04:32 PM
RE: Help with Jetronic Brake valve
 
Put it on the snap roll switch. When you apply full down, you can unload the main wheels causing a lock up at worst, the least it can do is introduce instability.

I use the snap roll button on my SM F-15 with the Jetronic valve and it works great.

Beave

ORIGINAL: turbinepeter

Tim

Thanks

Would it help then, if i played around with the 7 point curve??


making the mixing inactive, between min and max elevator??

Regards

Peter G

Per Strommen 09-05-2006 05:55 PM
RE: Help with Jetronic Brake valve
 
Your elevator to brake mix can be turned on and off by a switch if you choose to program it this way. Just make your retract switch control the mix. Gear down: Mix on. Gear up: Mix off.
If you are using flight modes just skip this mix completely in the "flying" flight mode.

For the mix itself I recommend the brakes to come on as soon as you give down elevator. Then you will have little or no "tail lifting effect" from the elevator, even at high speeds.


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