C-130 Setup: Seeking advice
 

Hello

Been an avid reader of this forum for over a year. Currently have 2 P-38's (Royal and VQ) and decided 2 engines wasn't enough. Therefore, opened wallet and dove into a Jet Hangar C-130. Building with 2 PCM receivers for redundancy along with battery backup on each. Could use some advice:

1. Have 9 CAP radio.....using 2 channels for engine mix (L/R).....have Futaba Matchbox's vs. y-cord for each side (1&2.....3&4...with 1 & 4 as "channeled" engines)......advice on better way for synch up? Redundantcy/Backup?

2. Splitting electronics up with 2 receivers......any thoughts on elevator (currently one servo...HS 5625)....gang up?


Thank you


Pics in Gallery

RE: C-130 Setup: Seeking advice
 

Try going to this thread. http://www.rcuniverse.com/forum/m_13..._1/key_/tm.htm These guys have been working on C 130's for awhile and when my budget allows, I will get one too.

RE: C-130 Setup: Seeking advice
 

rdavit,
I too will be building the JHH 130 and though I've never built anything this big before I do believe that special consideration must be taken to back-up the control system. What I'm leaning to is one receiver with two batteries. One to power the receiver and one to power the servos. With higher torque servos and servos for each flying surface, power ditribution will be critical. I don't want the servos pulling power from the receiver buss lines. So I plan on installing a seperate unit to isolate the batteries if they make one or make one myself. I also will be installing noise traps that I custom made awhile ago using an inverter chip with 100% reliability to this date.I beleive the literature for the 130 stated 2 heavy duty sevos for the elevator. Apparantely they are split with their own servo. I do have your pics saved on my computer and they are awesome. I can hardly wait for mine to come in.

RE: C-130 Setup: Seeking advice
 

I Concur....I'm using ferrite torroids on the lines to break any potential interference. Had a mishap last year and lost signal on a p-38 coming in on final (possible fail safe kick in....still not sure....taking no chances with this one). I have found an Autopilot from MPI (Max Products Inc.) that will fly the plane in a circle at level Alt if fail safe kicks in....contemplating. Happy to hear you went with JHH.....the work you see on the pictures is being done by Dave Gaer....very reasonable on labor...I supply the parts and he supplies the time/know how (he's a retired guy who loves to build..... 8 hours a day). Any technical questions, I'll forward his phone #. Due note....the plans are VERY basic....no instructions. Dave is building in 4 fowler flaps (with the Robart fowler hinges), lights (strobes and navigation).....will post more pics as develops (finishing up right wing this week....about 70% done with plane).

Bob

Keep it simple
 

I have been flying my c130 for about a year now,, ref other thread. My pics finally were deleted and a new thread started. I used 2 receivers, but not for reduncy but simplicity. I used one rec/bat for the wing, engines and flaps. The other was for the fuse. retracts, nose wheel steering, rud and elev. I did use dual elev servos, and 1/4 scale 120 oz for the rudder. Standard servos for the nose wheel. By using one for the fuse and one for the wing, I can remove the wing and do all work, testing on the bench and also with the fuse apart. What it does electrically is remove the connection that occurs when you X the wiring. X ing is having wires all through the wing and then the fuse When this is plugged to the receiver and only 1 is used you enhance your possiblity for glitching. By keeping 2 systems electrically apart it is much simpler. I also ran one rec antenna along the top of the fuse and one on the floor.

This has been glitch free for all 22 (8 minute) flghts. So I have about 2+ hrs in the air time and not a glitch.

I considered multi channel for engines etc,, but just too much complexity. I have flown engine out on flt # 4 and with proper mixing it was a normal herk landing.

vettdvr

RE: Keep it simple
 

Thank you Jim

Having only flown twin engines to date, engine 1 & 4 were where I wanted to get synch up right on through the full throttle spectrum (9 CAP has 5 increments to set to). The wing will have connection points for throttle/flaps/aileron/lights & on-board glow....5 connections each side (engines 2 & 3 will be part of fuse/center wing). My thought was to split the plane in half for redundancy/safety vs. convienece (had a fail safe last year and lost a P-38) with the two receivers: split aileron control between receivers....engines 1& 4 one receiver....engines 2&3 2nd receiver.....gang elevator (2 servos.....seperate receivers)....then have rudder, gear, brakes (function of down elevator), cargo door and "slurry" drop on one receiver (Both receivers backed up with a battery backer). I am considering the MPI autopilot as the ultimate backup.

Too Complex.....beyond the KISS aproach....definately! (some one could "turn" on and the whole bag is up for grabs). But, with the investement in this, safety of spectators, does it make sense to take technology where it is today?

I appreciate your advice and input.

Bob