MAIN ON OF KILL SWITCH

[Graham Ord]

Hi All
I have found out that when the receiver battery runs down and cuts out with the main 24volt switch in the on position the L/H track goes into full reverse with unforseen consequuences and switching off the 24volt supply is near impossible.
Reading through the various electronic forums it seems there are three possibilties?
A, Fit a Quassar2 remote radio controlled switch http://www.huntersystems.co.uk/acatalog ... ntrol.html
B, Fit a BEK?
C, My wiring is wrong.
All three would require detailed wiring/fitting instructions for me so before I progress has anyone any experiance on any of the above.

[Allan Richards]

Graham,

I am not sure why your model is doing this but its not very desirable. I think that as the battery becomes discharged there comes a time when the ESC power circuit is taking all the current and the receiver is failing to work, resulting in this loss of control. I have the Quassar remote switcher in my Tiger and I do like it as it gives a sure fire independent way of killing the tank should its main systems fail. If you go this route I would arrange for the Quassar to power an automotive 40 amp relay to take the really heavy current, don't rely on the Quassar relay. When the current goes low on the batteries on my Tiger the Quassar unit is the first to cut out which kills everything.

[Armortek]

Graham

Your problem is more likely to be caused by the fail safe setting on the transmitter. This is factory default set for aircraft at 20%. For a a tank this default must be set 50%. The manual tells you how to do this. A kill switch or other complexity is not necessary.

Mark

[Graham Ord]

Mark
Thanks for your input. I will read the manual when I am free from decorating the front room and report back.

[Graham Ord]

Have reset the fail safe setting to 49%. Will have to see if it goes on the rampage at Liskeard if the receiver battery runs too low. I have been assured that it will not.
What would happen if I blocked it up to clear the tracks switched everything on and then disconnected the receiver battery to simulate the receiver battery running down?

[Richie Wignall]

Hi Graham

The easiest way of checking that the fail safe is working, raise the tank of the gound totally, and make sure it is stable!

Then turn off you Transmitter radio. if the fail safe is set right your tank should not make a sound. but as Mark said, it must be set a 50%.

If the tank starts to go nuts , its off the ground!!!!

Richie

[Graham Ord]

I am currently thinking about making a plate jack thing that can be slid under the belly of the tank and used to lift the tracks off the ground. The design has not crystallised yet but I want it to lift the tank completely off the ground by about an inch and be able to wheel it about in emergency situations (like when the track broke at the Armortek open day!!!).
There are problems as the wheels cannot be too big (and hence difficult to move when the Tank is lifted) and the lifting mechanism would have to be robust.
Any ideas???

[Adrian Harris]

Sounds like you want something like a sack truck but with a longer than average shelf.

If the wheels are too small, the weight of the tank will stop them turning and then you'll have a sledge with a minimal contact foot print.

If one track has broken, it's probably easier to remove the other and push/pull it around on the road wheels.

I haven't really thought about the tank recovery in the event of a failure. I use a lifting table to move them around but even that gets stuck if it's not on a good hard surface and it's too heavy for me to lift into the car unassisted.

Adrian.

[Adrian Harris]

Just found this:

http://www.liftmate.co.uk/llt10sf-palle ... ingle-fork

A bit OTT at 1000kg capacity, and it's £495 + VAT, but it's probably the closest thing to a commercially available tank lift.

Adrian.

[Graham Ord]

At that price thats why I want to make one. Some kind of screw jack or scissor movement on each corner.

[Adrian Harris]

How about adding wheels to one of these ?

http://www.amoirtools.co.uk/Centre%20Stand.html

Adrian.

[Graham Ord]

Do not forget its got to fit under the belly of the Tank when its on the ground so closed height including wheels would be approx 50mm.
It would only need to go up enough to clear the tracks off the ground.
Its not for loading/unloading or lifting the Tank up to working height its for emergency use only.