Its been a while since I last updated but here we are. After what feels like waiting for an eternity for them to come back in stock, I ordered and got a Heng Long 7.1 MFU and transmitter, along with the CNC J4 smoker and the uprated twin speaker. I did consider the Clark and Elmod boards but they’re just a bit too pricey for me, and in the case of the Elmod board loaded with features I’d likely never ever need.
I plugged the speaker and smoker into the board to do a quick pair and test before I go installing everything into the tank, and hoo boy I was not expecting the somewhat “violent” behaviour of both components (sound on).
I have to say I’m extremely impressed. I admit my very positive impression is probably mainly down to going from an 8 year old Taigen V2 MFU to the latest HL, and that my last experience with a HL board was the very first 27mhz non smoke, non sound, non proportional Tiger (with the upside down mantlet). There’s just so many options to customise, and the sound while not as accurate other options scales really nicely with throttle power, and its very easy to drive in a realistic manner.
Satisfied with the new board, the first order of business is to remove the old electronics setup.
Once all components were removed the next step is to desolder the existing wires for the motors and replace with the new bullet style connectors. After a quick perch on the obligatory tins of baked beans to make sure the gearboxes worked ok with the new wires, I installed the new MFU.
This is where the first challenges began to appear. The 7.1 MFU is quite a bit larger than the V2, and because of the way the connections to the gearboxes are designed I’m not able to position it as far forward as I’d like. As you can see from the clip above, the smoker motor moves around quite vigorously, and inside the hull this translates to a noticeable rattle.
I ended up securing some foam to the side and floor of the hull interior with double sided foam tape, and then secured the motor to the foam with more double sided tape. The rattle is transformed into a mild vibration that can be felt through the tank.
What has proven a challenge is the speaker. Its too big to fit into the sponsons without fouling the turret rotation motor. What I might end up doing tomorrow is fashioning a form of removable riser to support the speaker so it can just sit above the battery and the empty space in the left rear of the hull.
I also noticed that I’m going to have to re-wire nearly all the connections in the upper hull because they’re 3 pin and the HL MFU is 2 pin, so that’s fun. I’m hoping as well that I can take the servo connector for the recoil out the turret and plug it straight into the board without too much trouble. Overall though, its worth the effort.