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Okey Dokey...
Liberally lubed both gearboxes with white lithium grease and turned them both on powered by fully charge Venom 4200. Covered them with paper because grease went flying and left them alone for about 45 minutes.
Both Jamara 480 Pro HS motors warm to the touch and these are the average results from both gearboxes:
Jamara 480 Pro HS (both turning at same time) .35 Amps 7.41 Volts 2.5 Watts 268 RPMs (Tiger I Sprocket)
As stated earlier, this set up should work awesome with Stock HL Boards and EL Mod at 5.5 Volts. Heck, it would be more powerful running HL alone!
Tried to grab the output shaft and impart resistance, get it to slow down while I watch the Watts Up Meter, I couldn't affect a thing! What do you guys think???
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El Mod here we come baby!
Worked up this diagram and asked The Blitz if he thought it would work. Bullyshs confirmed it should.
I placed the gearboxes and electronics on the table and hooked up the HL and made sure it worked. Then hooked up the El Mod Booster and tested it out. No fires!
At idle the Watts Up Meter read .47A @ 7.42V and 3.4W. At full throttle 2.4A @ 7.14V and 17.1W. The Booster's heatsink got warm after 5 minutes but never hot. The highest amperage the whole thing drew was a peak of around 3A jockeying the controls around.
Then I hooked up the Afterburner. It's heatsinks never changed from room temperature. The whole getup drew about .50A at idle now.
Next I hoooked up the TLS and Blaster. Left the HL speaker to listen for engine start. Nothing. HL started, TLS light flashing. No power to motors. Had to plug in HL 8-pin connector from board to TLS to make it work.
With the Afterburner, TLS and BLaster hooked up the total current draw was 3 amps at full throttle. Spiked to 4.6A. All heatsinks were room temperature except for the Blaster's. That one was pretty warm, almost hot.
Remember this is static testing without load on the motors. Once everything's in the tank I will test again when the tracks are installed and it running place and see how much it draws then.
Now I have to figure out how to package all these boards and make sure the Blaster gets the bulk of the fan's cooling air.
Note: This diagram shouldn't be relied upon yet. It's posted just as a guide and is working for me so far. Right now the on/off switch is bypassed and power is going directly to the junction block via the Watts Up Meter.
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Ok, with the Venom 4200 freshly charged it's drawing .59A @ 8.11V and 4.6W. At full throttle it's pulling 2.67A @ 7.64V and 20.3W. Highest Amperage recorded was 4.10A and 31 Watts. Set the trim lever full forward a couple minutes ago and will check on it in a little bit to see what parts are getting hot.
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Have the volume turned down because the kiddies are asleep. I did crank it up for a couple seconds and the amperage rose about 6.A. The only heatsink above room temperature again was the Blaster's. The motors were pretty warm.
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This is great data and I want the guys to understand what you are doing here...Swath is the first in North America to combine EL MOD Booster/ TLS and using the Afterburner with the stock Heng Long boards, stock Heng Long radio, with 480 motors and early results looks like it will be one mean machine!
Swath here are a few more photos of installs to spark some idea, Merle did my KT and this odd non S & S EL MOD install!
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Thanks Blitz!
Last update for the night. Ok last time we put a tachometer to the sprocket it was turning 268 RPMs connected directly to a 7.2V stick. Tonight through El Mod the Low Mount gearbox turned 227 RPMs and the High Mount gearbox 231 RPMs at full throttle. About as good as it gets I guess!
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quote:
ORIGINAL: swathdiver
Thanks Blitz!
Last update for the night. Ok last time we put a tachometer to the sprocket it was turning 268 RPMs connected directly to a 7.2V stick. Tonight through El Mod the Low Mount gearbox turned 227 RPMs and the High Mount gearbox 231 RPMs at full throttle. About as good as it gets I guess!
Swath,
That is very good considering they are running at a lower voltage then your test above it shows that EL MOD is highly efficient! I can't wait until you test drive it!
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Thanks Jake,
The amperage is for everything, fan, HL board, Booster, Afterburner, TLS, Blaster. With the speaker volume cranked up the total amperage draw is about 3.0A. I don't think I can accurately measure amp draw per motor with the Watts Up Meter. The Watts Up Meter hooks up like jumper cables.
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El Mod continues.
Made the speaker box the other day from hobby aircraft plywood. Turned out pretty good I thought. Not too crooked!
Then began work on the electronics tray. Was hoping to fit all the parts on the tray but there's just not enough room even in the Tiger's cavernous hull to fit everything together. Wanting to keep the smoker, the only place left for it was under the airsoft unit. The TLS got the boot from the tray, it will be mounted under the radiator exhaust on the left side. The receiver will go back to it's former position in the right side pannier about even with the turret. The tray will mount the battery, junction block, cooling fan, Afterburner, Booster, Blaster and HL Main Board. The hottest item is the Blaster, the fan will be positioned to blow on it. The tray is elevated about 5mm above the metal plate creating a bilge should any water get into the tank.
The mounts for the gearboxes had been rethreaded several times over the years. To ensure the gearboxes wouldn't move around I through bolted them this time using 4-40 machine screws up from the bottom. Used a 4-40 drill and tapped for a little extra strength. The head of the nuts butted against the interior walls of the gearbox so I just had to hold them in place over a lock washer and screw them down from below. The center mounts went much the same way but used a wrench to hold cinch them down a little tighter and the forward most mounts I used new sheet metal screws so they wouldn't protrude through the lower hull.
Hooked everything up today before shortening the wires and checked everything out. The motors were howling! One of them. Turns out the top mount motor's pinion moved out a little bit (or the bracket bent) and began hitting another gear. Pulled the motor and shortened the pinion on the shaft to keep it away from the wrong gear.
Watts Up Meter showed 4.1A at full power but I suspect that extra amp was the drag from the pinion being out of alignment. It was nearly 3A with just that motor turning while I was isolating the problem. Will post pictures in a little bit, check back.
< Message edited by swathdiver -- 7/7/2008 2:31:19 AM >
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This is an updated wiring diagram for those interested in seeing how the main components of El Mod can be hooked up with Heng Long electronics. Feel free to use it, distribute it and ask questions.
Printable Version
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