39% Install - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Jun 19, 2010, 07:17 AM
Registered User

39% Install

I just bought a used 39% 540T with a fiberglass fuselage. It hasn't been flown in 5 or 6 years. Lots of servos, JR 8411's all around. 4 on rudder, 6 on alerons 4 on elevator. It is still on 72mhz. What receiver set up would you suggest? I have A123's to use, 2 on receiver and 1 on ignition. Where would you locate the receiver. I've look thru the install thread but didn't see anything this large or with a fiberglass fuse.

Thanks, John
Sign up now
to remove ads between posts
Jun 19, 2010, 11:28 AM
Are you using matchboxes for the surfaces?

Any of our receivers will work, providing you have enough channels.
Jun 19, 2010, 12:50 PM
Registered User
Hi Jim,

Thanks for the quick reply, it does have match boxes in place right now, I have 8 channel XPS rec'vr units as you probably know. It has a smoke system also, not sure yet if I would need a 10 channel rec'vr. I only have 9303 Transmitters but could if necessary go to sometime with more channels. Do you think adding a second rec'vr would good?

Thanks, John
Jun 20, 2010, 11:52 AM
A second receiver is not necessary, but you could do that if you like. I fly my 35% Hangar 9 Extra 260 with our 6 channel Nano-E receiver, so our 8 channel would work fine your applicaiton.
Jun 20, 2010, 06:14 PM
Registered User
Thanks Jim, where are you locating the receiver? Right now the location of the 72mhz receiver is buried on the bottom of the fuselage, I plan to at least put a tray up high and maybe even have it exposed in the canopy/cockpit behind the pilot.

Jun 20, 2010, 07:06 PM
I put our receivers in the turtle deck or inside of the pilot, up high and out of the way as possible. For installations where this is impossible, we have used our sailplane receiver and ran the antenna to the top of the canopy.
Jul 08, 2010, 11:09 AM
Registered User
Thanks Jim,

Lots of room on the turtle deck. How do you wire/configure a dual receiver setup?

Jul 08, 2010, 11:58 AM
You must have v3.0 or later firmware. If you do, then download our v3.x manual. There is detailed information on how to do the binding process for multiple receivers.
Jul 08, 2010, 02:14 PM
Registered User
Hi Jim,

Thanks, got all that. Didn't realize it was in there. Will it show how to wire them?

Jul 08, 2010, 02:15 PM
Inciting Riots
village_idiot's Avatar
Just from a safety point of view, wouldn't it be a good idea to put some of those servos on a second (or third) receiver with its own battery? That way if you lose a battery or a receiver you would still have half of the servos working? I guess this would only work if you had the control surfaces split so that the working half wouldn't be fighting the frozen half. Or am I totally off the mark with these thoughts?

Also isn't there a built in matching function in the newer and bigger receivers? Each servo would of course need its own channel connection, but I thought I remembered talk of this once upon a time.
Jul 09, 2010, 05:30 PM
You wire the receivers just as you normally would. You can set the channel mapping so that any channel appears on any receiver port output.
Jul 09, 2010, 08:09 PM
Registered User
Do most people split up the control surfaces ie: alierons from one wing on one receiver and the other wing on a different receiver and rudder on one receiver and the evelator on a different receiver? etc.

Thanks, John
Jul 10, 2010, 01:49 AM
Some people do that. I have always run just a single receiver in everything except our F-15, where we needed 14 channels (duplicates of some channels were used).
Jul 10, 2010, 07:03 PM
Registered User
Thanks for all the help/comments.

Jul 31, 2010, 08:34 AM
Registered User
I've got all the matchboxes setup and am using dual receivers. Left Alieron, right elevator half and 2 of the 4 rudder servos on one receiver. The opposite for the second receiver ----- now for my questions - What about the throttle? Can I put in a Y harness and run one throttle servo off two receivers? Can I daisy chain the power (battery packs) to the receivers ie:
A123 in the B/T port on one receiver, a jumper from the 8th channel to the second receivers B/T port and then an A123 in the 8th channel of the second receiver?

Thanks, John

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Help! 8.38 install problem? (XP) equusine Eagle Tree Systems 16 Apr 16, 2010 08:40 AM
Help! trex 450 head and gear install outcrydrummer Electric Heli Talk 3 Mar 22, 2010 04:41 PM
Question How to install Whistle on Cheddar Pintail Plant sailfish Steam Boats 12 Mar 15, 2010 10:28 PM
Discussion Install hinges saguaro_48 The Builders Workshop 7 Mar 14, 2010 07:27 PM
Video Sapac L-39 Brake Install sbritton Electric Plane Talk 7 Feb 13, 2010 02:04 AM