I have heard that you can adjust the speed of the new Tamiya KV1. But some one that has one said there was nothing in the instructions as to how to do that or if this is even true.

Does any one have any info on this.

Thanks !!

The main Tamiya website, NOT the USA site, states the following about a "low-speed" setting for the KV-1 control unit. Below is the only info I have ever seen from Tamiya about it:

"The DMD Control Unit T-08 features a special low-speed setting which enables slow lumbering movements for even greater realism."

This statement is on the KV-1 product page on their MAIN site. So far, I have not seen any input from any KV-1 owners about this feature or how it works, or if it truly even exists..

i am wondering....

Thanks for the info. I think this is where someone I know got the info from. I will right them and ask the questions needed.

Thanks again.

Finally! Someone has verified the SLOW SPEED mode on the KV-1! They did an awesome demonstration of it too! I love this video. The KV-1 is in its element, in the mud of the Russian front. Dirty, weather-beaten, mud caked all over the tracks and road wheels. This is how you properly break in a new Russian tank..

Didn't like the battery sitting on top of the engine deck, maybe he did that so it wouldn't get wet? Don't know, but it is damn cool! No 3:1 reduction gears in this baby. I still say it sounds like it has a turbine in it.. Its supercharged! [8D] Yeah, sounds like a tractor trailer truck climbing a hill with a heavy load in the trailer.

[youtube]http://www.youtube.com/watch?v=N3pFDa6nRU4[/youtube]

This guy sent me a mail and said this particular tank has some sort of custom 2-speed transmission installed in it. He said this setup requires mounting the battery pack externally. I suppose there is not enough room left inside the model for the battery after the modification. It has nothing to do with the Tamiya stated "Slow Speed Mode" which I guess is just marketing BS and doesn't exist..

Here you can see another video of the same 2-speed TU installed in a Tiger I. It does make them look much more realistic and less toy like in movement.

[youtube]http://www.youtube.com/watch?v=i_Gb0hlVNq0[/youtube]

Any pictures of this set up inside the tank? Probably a servo activated mechanism if it takes that much room. Either that, or it needs the extra capacity.

Gents, THAT IS KILLER SLOW geared down moves.. I love it!!!!

I have read, and re-read the instruction manual before shipping it off to get painted..

I couldn't find anywhere about slow speed manuvering/adjustment like this!! THIS IS GREAT!!!

-LET ME KNOW IF THERE IS ANYTHING NEW in regards to how to make the stock one function like this... I have yet to find it ,,,

-CHEERS and thank for sharing this great video!! AWESOME!

-TOMAS
TX ARMOR

I am inquiring if the owner has any photos of the tank's interior.. He did confirm that there is NO room left inside for the battery and that the gears are changed via transmitter control. Also, the tank uses modified Tamiya gearboxes, so it is not using a completely custom gearbox.

I don't think you'll be able to get the stock tank to function like that without doing whatever modifications this person did.

I downloaded the KV manual from Tamiya's site and there is NO mention of any slow speed mode.. Within the manual though, it repeatedly states "Refer to Operation Manual for further information" about various things like the "Gun Elevation Dead Band Trimmer", Recoil/Fire Interval Select Switch", etc. Tomas, is there some sort of separate Operation Manual that comes with the tank kit?? I notice the KV manual (the assembly manual I will refer to it as), does not identify the various parts and trees like some of the older manuals did.

RSEA,
there is another "manual" I will scan it into the computer as soon as I get it back from Maloney! Hopefully this SUNDAY!

THANKS!

TOMAS
TX ARMOR

I realize im drifting off topic but that 2 speed is very cool.

Wonder if its a modified version of this one?









http://www.afv-model.com/4711shop/pr...e9b7ebe8ac909b

That is quite interesting, but I don't think that arrangement would fit inside the KV-1 lower hull. Would probably be too wide, and if it did clear, there would be no reason to have to mount the battery externally. The Leopard hull is probably wider.

Thanks Tomas! I'd like to see what the other manual has to say.

hi,
asked the owner about the speed of the t34.. he said he used a HL metal gear box and HL electronics but diff remote..
now i am very confused because he mentioned about he added a servo for the gears...

daryl

After corresponding some more with the guy who owns these tanks, he told me how his setup works.

Inside the tank there are a total of 4 gear boxes and 4 electric motors. A pair of stock Tamiya gear boxes and motors drive the sprocket wheels at normal speed. Immediately behind the stock gear boxes are a second set of gear boxes and motors. A Servo engages and disengages the secondary set of gear boxes from the primary set (they slide fore and aft). When the second set engages the primary set a mechanical rod activates a microswitch which diverts the electricity to the secondary pair of motors. When in low-speed mode (secondary gear boxes activated) the primary motors are simply freespinning along with ALL of the gears in both sets of gear boxes. Since the power is transmitted through all of those gears, the tank's speed is very slow, yet the engine sound effects are reving high as if the tank was running at flank speed (which is what a real tank would be doing anyway, if it was running in a very low gear). I think this secondary set of gear boxes are Heng Long.

This set up takes up A LOT of room inside the tank, leaving none left over for a standard six cell SC-sized battery pack. That is why you see the battery mounted externally on the upper engine deck of the models, as there is just no room left inside to house it. The DMD units are mounted horizontally across the hull between the second set of gear boxes and the speaker box. It is an interesting set up, but not very practical because of the battery space issue. It is a fairly inexpensive method of building a 2-speed transmission, but at the same time, it is very inefficient in terms of space used and battery power consumption (one set of motors driving all of those gears along with two idle motors). Now that I think about it, a good high capacity Li-Poly battery might solve the space problem and allow for the battery to be stored inside the tank with this kind of set up.

The custom Leopard 2 gear boxes, shown a few posts above, are a better design and probably give longer battery life, but would not run the tank as slowly and most likely generate less torque. Also they have a neutral position for free coasting or towing, the quad gear box set up has no neutral position.

Hello
My God how much about my work without me.
Any question just ask!!!!
All modiffication in my Tamiya's tank are very very simple.
If you stiil interested how it works just ask.

Regards

Pawel

ps my English is not very well so you have to forgive me mistakes

This is the man, Pawel! He is the owner of the 2-speed tanks. Any further questions about it he can answer.

Hello I've read in the post above that this modification takes a lot of energy. But I'd like to say that when you drive in normal speed works only tamiyas gears. Another gear is stop. And vice versa. When you drive slow speed works only second gears (HL in my tanks). In speed drive tamiyas engines is only rotate (not powered) . Power suply is changed when you change speed.

Regards</p>

Pawel,

This is me Steve! I was making some assumptions based upon the photos you sent me. I wasn't going to post them unless I got your permission to do so first. It seemed to me like it would increase the current draw when the slow speed gearboxes are engaged. Again, I was summarizing what I noted from studying the photos, I may have concluded incorrectly about some details of the set up. Like for example, I am not sure how your servo is actually moving the second gearboxes forward and aft.

What are your thoughts about using a Li-poly battery or something like that which might fit inside the hull instead of having to mount the battery externally on the engine deck. Also, if it is okay with you, I can post the photos that you sent me on the forum here?

Steve

Hello Steve
There is no problem you can post this photo (this is Jagpanther on this photos). About battery. My every model has baterry outside. I konw it looks not good but has one advantage. You wont dirt when tank is in mud.
Hey guys it my ideas but if you have concept about baterry and somoone else just write. Every ideas is good.
I'm not as good modeller as you so every improve is very desire.

Regards

Very impressive work there Pawel! [sm=thumbs_up.gif] Where are the photos of your projects? The videos convinced me that a 2-speed system is needed very much.

- Jeff

Very ingenious Pawel, just a quick thought about the power drain when in low speed, isn’t any electric motor a generator when it’s being free spun?

Hello again. Ok J take some pictures (jagdpanther 1/16) Here you are this modification. J will try to make today film how its work on Tamiyas tanks and T34 on HLelectronics

Regards

I've added new films on you tube. First is about KV-1 all modification insiade and second is about T34/85 WSNalso with modification inside.

1.KV-1http://www.youtube.com/watch?v=Q4OZGZtBucQ

2. T34/85http://www.youtube.com/watch?v=sjGbs6okyKs


I direct my all films, watch and give some comment

Regards</p>

very nice...