Armortek

Hello Chris,

I don't think that this would be a good way. OK, you can achieve ducking and lifting by pneumatics, but only artificially at certain occasions; e.g. at braking or accelerating (controlled by electronics). A good tank should also be able to run smooth and fast in a rough ground, and I mean that is very difficult to simulate by electronics. A smooth working road train however should cause these effects automatically.

Hi Phil,

even an well oiled o-ring may cause too much friction, so I fear. A sealed ball bearing should be a better solution. But OK, this would be a larger modification..........

Well Pneumatic actuators I never thought of using those ..excellent idea Christoffer but not for me I prefer the simple "C of G" approach rather like an aircraft as it hangs in the air on the vertical axis and therefore very sensitive to the input commands for changes in direction (attitude) about this axis. So if the "C of G" in our model Tiger is correct, the batteries being used to balance the vehicle to achieve this, the mass should react proportionately under acceleration and braking, as Gerhard said the bearings would play a very big part in allowing for a smooth motion with as little friction as possible (I wonder if the damper equation may rear its ugly head).
The reason for having the larger torsion bars about the "c of g" is to help the vehicle to rock or swing about this axis, as if it was pivoting around them.... Lots to think about Guys ..so lets have a go.
Gerhard, the best I can do with the gear change using the 7c TX is exponential on the right stick which gives the illusion of a gear change but the TX wont allow the same (as far as I can see) on the left stick as this is designated as the aircraft throttle mode...I may have to dig deeper into the advance setting? Idealy the flick of a switch to exponential to by linked to both the left and right stick would be cool for me... Regards Phil

The Panther with the dual torsion bars gives the best rocking action of any of the Armortek models.

I know dual torsion bars in a Tiger isn't prototypical, but the increase in external behaviour realism might be worth the loss of internal, and hidden, build realism.

Adrian.

Hi Phil,

I think that your idea with the CoG is very good, but it is not the only thing: the agility of a vehicle ducking and raising at one end (= turning around its CoG) is also dependent of the manner how the single points of weight are allocated over the hull. E.g. when you install 2 batteries directly in the CoG the model will be more agile than it is when the batteries are positioned in each end of the hull, though the CoG is the same in both cases.

Hi Phil
Suspension bushes or bearings – an interesting question.

I am a bit late on this conversation, but I agree with Gerhard on the suspension bushes/bearings particularly after I finished the set up on my second Tiger.

I was very surprised when I checked the ride height (wheel bearings only) that it actually bounced . . . not a lot but a good start I thought.

I am definitely a long way away from the “cup of tea” method that Gerhard refers to, but the difference was quite interesting. I think that if you can’t use a bearing then increasing the length of the bush should help (I could be dreaming) but if you consider the moment that is put upon the bush, particularly with the torsion bar being the only other control on the arm’s position, there must be a degree of pinching friction on the bush, so a longer bush should help.

So for design #3 it will have to be bearings - got to pass the “cup of tea” test . . .

Good points, I think the "mug of tea" expression used to express the suspension movement of the system, ie the deflection and recovery of the linear torsion bars over the mass acting on them is going to stick! Brilliant... "THE MOT" .

I just love the look of your set up Liam and those grease points, thats a lot of work but it looks so cool and its functional.
The bearing bushes are pretty good as standard in our kits, I think most of us just need to lubricate some how. I shall use the "total loss" light oil method as I am lazy.
What did the full size vehicles use? Maybe needle rollers to replace the bushes might be the easiest to install for us.
Very interesting.

The hard target restoration doing her job ....being used as a prop.
I have been shooting some new video to see if the old girl will tow at speed,and also studying the new smoker system, you will see in the next video that in my opinion all looks very promising indeed.