Ok I'm building a TopFlight Gaint P40 with DX8 and AR8000 reciver

As we can't use reverser Y my elevators are going to take 2 Chanel's

Now I Run a Kill switch on almost all my gassers.
But on this one I was holding to use a servo on the choke so I don't have to go throw the head ack of tring to figure a neat way useing 4-40 rod to pull the choke

so I have been thinking of 2 options.

No kill switch and use that Chanel's for a servo to close the choke for starting and emergency ststoping

Or is there a way wire in a servo with a 3 way switch that I can flip while power is on so I flip the choke on and off?

thanks<br type="_moz" />

If you configure your servo properly, it will not need to be reversed. There was a time (not that long ago really) when we did not have servo reversing transmitters. But if this is not possible, you have options.
I would stay with an ignition kill as they are safe and have other benefits. I have been running a golden rod cable to my chokes and they work great. I run this back toward the cockpit to a hinged hatch to a little rectangle of plywood that also supports my switches and retract air fill valve. Be sure the cable sleeve is fully supported full length as to not get flex. At the end of the cable where I grab it to open or close it, I solder a small blind nut to give something to grip.

Hope this helps

Do you have any 3 way switches on your Tx? that would solve your problem for switching. I wouldnt use a choke to shut the engine off though. As the per the last poster Id use a switch, just like you have been doing. I believe IMAA requires them for safety. You can use the servo for choke though, seems easy to do.

The original remote kill switch on gassers was a simple On/off switch connected to a servo. You could use a three position switch to do the same thing, or even two separate on/off switches with the servo controlling both of them.

Hummm. So your saying I might be able to put the choke servo and opto kill which on one chanel like Chanel 8 by useing a 3 posh ion which?

1: opto on
2: opto on/choke servo closed
3: opto off to kill motor

I know people say not to use reverse harness with spectrum. But all my eflight electric retracts come with them and I'm useing them in 5 war bids

what about the Smart Fly equalizer 2. It would let me run the elevator off one Chanel

thanks guys<br type="_moz" />

Can you turn the servo over? That essentially reverses the direction.

No room for that.

Thats why I typically like the Hitec 645 as they are the easiest to open up and reverse but I really like these futabas and the motor is soder to the board so not something I want to deal with<br type="_moz" />

Correct me if I am wrong but can't many Hitec Servos be reversed with their servo programmer?

Yes if you get digital. But the Analog are not programmable

it takes all of 4 min to switch the 2 out side wires on the pot and the 2 motor leads


I took VG recommenashon I could not flip them but move one servo over and attached the arm to othere side of the servo.

I just like Futaba better than Hitec as they seem to have less slop

I'm going to ask this question else were as I still want to know if you can move a servo with a switch<br type="_moz" />

I am not sure I understand your question. But you have a 8 channel RX and a 8 channel TX. If you used a Aux channel for the second elevator servo, then that still leaves three other AUX channels for other things on your TX and RX for things like a kill switch or a choke or something.
You can dial in the servo end points to match up with the choke OK. So you could use one of the  TX switches coupled to a AUX channel to work for that.  If you have an optical kill switch you could control it another AUX channel too. A mechanical on/off switch gets to be more tricky though. But you could use the choke servo to run both. You can use a spring and a small diameter wheel collar on the pushrod and a three position switch on the TX to control it all. The wheel collar pushes the switch on or on inside of the plane. The spring allows a little give for the choke servo  to exceed its travel some.

You can operate a switch with a servo, but not really sure that helps you here or what it would be for. The ignition kills do not need a servo to operate.

Now that your servo is going the right way, you can use a Y harness there. I would use a manual choke cable so you can prime your engine to start it.

I would also recommend an optic kill for your ignition. Then you can kill your engine, and if you have a radio issue, the optic kill will auto shut down your engine.

Set up your servo for a choke and use another Y-harness to bring power to your receiver. I have the same setup on my P-40 with an 8 channel receiver. No problems. You'll love the way this model flies!

Lifter. Thanks I hope so. This is my 3rd year flying and all my flying buddy's say your supposed to fly in the summer/spring and build in the winter. But this TopFlite P40 is going together to easy, or I need more of a challenge.

I started this bird a little before Christmas and I'm almost done and I want to fly it LOL

When I got my Dx8 I thought there was no way one would need so many channels but

1ower
2:elv
3:rudd
4:ali
5:flaps
6:gear
7:Kill Swich
8:choke servo/or if need to split elev
9: I was holding to put smoke on it to

<br type="_moz" />

I would second the "Y" cable on the channel with the choke servo to provide power to the receiver . Much easier than setting up a mechanical 3-position switch with the extra servo rig inside the plane. Or swap out the elevator servos for some programmable ones.

Believe or not but some guys are already clamoring for more channels than a 18 channel system can provide.


Quite a few people fly in the winter, usually when it isn't too windy. A whole new experience in how to run a engine or electric when it is really cold and so on.

On-board heaters ?

I'm a houseplant! It's 30 degrees outside, so I build airplanes and also watch my hometown football team get shoved around on Sundays......

I just flew my Balsa USA Northstar of the fresh snow and it rocked!
mnow if only they could plow the snow off the run way

Lifer,

I'm from Columbus Ohio, My son graduates from Ohio State in the spring and is moving your way to work for Honeywell. Lots of rc clubs there?

I know what you mean about your football team. I'm a Bengals fan so I too am used to pain! Hopefully we will win a playoff game this year!<br type="_moz"/>

rexbirk,

It would be my pleasure to help your son find the local fields. Send me a pm and I can assist.

PM Me to as I live in Columbus OHIO and Its great