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>> Home > Tags > twin motor

twin motor
540 motor
brushed motor
brushless motor
johnson motor
motor cooler
motor mount
reversing motors
torpedo 850 motor
torpedo motor
twin motor
twin rudder
twin motor
Electronics Down Below (5) by RNinMunich Fleet Admiral!   Posted: 1 day ago
Hi Neil, You read too much!! 😉 Before you give yourself the work of altering the rudders see how she performs with the twin ESC & rudder mixer. For slow manoeuvring, especially in reverse, I'm pretty sure the rudders will be almost irrelevant, apart of course for controlling the mixer and hence motors. If you use the P94 in Mode 3 you can spin the boat on it's axis😉 The guys with small rudders in front of the props most likely don't have twin ESCs and a mixer. Two maxims: Why complicated when simple works! If it ain't broke don't fix it! I intend to 'suck it and see' first. Whatever you do have fun with it, but don't 'over engineer', cheers Doug 😎

Twin motor control problem by John Fleet Admiral!   Posted: 10 days ago
I was just nice to see her sail Dave. It was very quiet at Bury today, I guess a lot of people thought the lake would be frozen with the early frost we had.

Twin motor control problem by Dave M Fleet Admiral!   Posted: 10 days ago
Hi John Glad to hear you have a working boat. The new wiring and ESCs have clearly removed any previous faults in the connection between the battery and the ESCs. It was a beautiful calm day at Boundary Park, Cheshire and I sailed my Perkassa so must have been a good day for fast patrol crafts.

Twin motor control problem by RNinMunich Fleet Admiral!   Posted: 10 days ago
Very please to hear that Happy sailing 😊 Although as an engineer I always hate unsolved mysteries, gives me a creepy feeling that the real problem hasn't gone away 🤔 All's well that ends well! 👍

Twin motor control problem by John Fleet Admiral!   Posted: 10 days ago
Hi Doug, I am running late tonight due to my list of jobs! The problem is solved! I still do not understand what the problem was but the replacement of the escs has done the trick and she now performs as she should! Sailing today was a real pleasure thanks everyone for your help.

Twin motor control problem by RNinMunich Fleet Admiral!   Posted: 10 days ago
Hi John, earlier you wrote "Sometimes I have control of the speed on other occasions it has gone to full speed reverse and I have no control." Full reverse and non control is the classic case of aircraft Failsafe - Throttle full back!!!! You need to reset your TX to Throttle OFF for failsafe, and then look very closely at where your antenna is mounted. The RX should / may have two antenna wires these must be arranged at 90° to each other and one vertical, one horizontal. Cheers Doug 😎

Twin motor control problem by RNinMunich Fleet Admiral!   Posted: 10 days ago
Hi John, PT109? That foredeck and the torpedo mounts look more like a Perkassa to me! No Elco I've ever seen. I'm currently (or shortly I hope) converting an Elco 80 to JFK's PT109. Anywhere nearer solving your motor conundrum? Cheers Doug 😎

Twin Motor Perkassa by Dave M Fleet Admiral!   Posted: 10 days ago
I attach some pics of my 34" Perkassa. It uses two large water cooled brushed motors (650?). Two Mtronic 25amp ESCs with one red wire disconnected. You can see the ESCs on off switches over the former in the next to last pic. Presently has a Planet Tx/rx and I use 9.6v or 8.4v NiMhs of 3 to 5 amps. Not fused (naughty). The battery sits between the prop shafts towards the stern in a tray. I control the motors on the left and right sticks with the rudder on the right horiz stick. The left stick has a ratchet so I set the speed with that and use the right sticks to keep straight and steer. As an ex flyer this is an easy set up for me. Run time is about 10/15 mins but that's long enough for me and the other models on the lake!

Twin motor control problem by John Fleet Admiral!   Posted: 11 days ago
Hi Dave and Paul, as the two current esc’s are new under warranty and came fitted with Tamiya connectors. I am reluctant to cut the wires for now hence the connectors. The switches are one from each ESC one of which has the red wire cut. The range test was fine so the tx and rx are fine. The rx goes at the front under the deck far away from everything and above the waterline when it sinks in full reverse. The wires were out so you could see how everything is connected. If this does not work I can try two batteries next.

Twin motor control problem by pmdevlin Fleet Admiral!   Posted: 11 days ago
Dave, mtroinks have switches, so maybe when it had the pair of vipers, they where for the esc's? I would disconnect the red signal wire from the receiver end on the "y" harness, and use a separate 6v receiver supply, I have a number of twin screw setups, with a cheap battery monitor, if the esc fails, you still at least have rudder control, if the feed esc goes down, power is lost to the receiver, ensure you have a failsafe set at zero throttle. With spectrum, its usually automatic, unless...... you have reversed the throttle! that means you throttle will go wide open in event of esc failure. Easy test, on the bench, all set up to go, make sure all the props etc are clear, just turn your transmitter off, see what happens, nothing should! Have you done the range test? you might have been lucky having it go in reverse, Also, the gunner that is holding the esc wire, is he wearing a Teflon glove? His hand might get hot

Twin motor control problem by Dave M Fleet Admiral!   Posted: 11 days ago
Hi John Thanks for the pics. I see you are using Tamiya connectors. My experience is that they are unreliable and not suitable for currents above about 5amps. You appear to have the battery wired to both ESCs though one socket. As your problem occurs when both ESCs are connected I suspect the connectors are the culprits as they work then fail fairly quickly. Easily checked by using two separate batteries. If this is the problem I would hard wire the two ESCs to a chocolate screw block with just one socket for the battery. You might also want to consider a fuse in the positive wire to the battery. There are two switches, what are they switching and what type of switch? I can see the Y lead has one red wire taped up so assume power is from one of the ESCs? Where do you put the rx when the top is on? Hope you manage to move forward tomorrow. Dave

Twin motor control problem by John Fleet Admiral!   Posted: 11 days ago
The pictures with the new ESC's. It will be on the water tomorrow weather permitting.

Twin motor control problem by John Fleet Admiral!   Posted: 12 days ago
Thanks Tom, I shall have a read.

Twin motor control problem by tomarack Commander   Posted: 12 days ago
Hi, maybe you can look at > Modelboatmayhem > Technical stuff >BOAT ELECTRICS & A LITTLE BIT MORE! > there are interesting recommendations in the article for both engines and ESC. Maybe it will help you Tom

Twin motor control problem by John Fleet Admiral!   Posted: 13 days ago
Hi Berty, I am looking forward to the solution myself 😁