Recoil settings

[ronnie42]

Looking for a Tiger 2 scale recoil distance in mm. Found the figures for Tiger 1 recoil on 1/6 forum its 97mm so about 36 mm for 1/16 . Is the Tiger 2 about the same ? Thinking longer barrel might produce more kickback .

[43rdRecceReg]

In some circumstances, a shorter barrel but with a greater weight of charge, will produce a larger recoil. Several factors come into play: the length of the (cartridge) casing and the amount of propellant charge it contains (kwk 43 had a much longer and slightly wider cartridge than the Tiger 1); the type and weight of round fired; whether the barrel is rifled or smooth; and how efficient the muzzle break is at reducing resistance to the gas compressed by the oncoming shell... The Gun in the Tiger 2 apparently had fatter shorter recoil buffers than the anti-tank version,( to enable it to fit in the turret), as well as revised rifling and a more effective muzzle brake.
Finding the actual recoil distance is no easy matter, and it would tend to vary depending on the ammunition fired.
According to this piece, the Tank version of the Pak 43 had (and needed) a much shorter recoil than the anti-tank version. It was roughly: 38 and 58cm. I guess if you can find footage of the King Tiger firing the recoil could also be approximated from that.
http://www.network54.com/Forum/47207/th ... +tank+gun-
Here's an interesting discussion on recoil. It's from a shotgun site, but the same ballistic principles apply.
http://www.shotgunworld.com/bbs/viewtop ... 64&start=0

[silversurfer1947]

It's interesting that the original Pak36 88mm cannon at zero elevation had a recoil length of 105cm. The Tiger had to have the muzzle brake as there was not enough room in the turret to accommodate this. As a rule of thumb, it is reckoned that a muzzle brake will reduce recoil by about 50%

[ronnie42]

Thanks for the info . If i take an average figure its about 30 mm travel . Fitted at max travel the servo hits base of turret ring before max gun elevation. Going to move servo forward and fit a smaller gear. Better check my Tamiya KT recoil , it may be wrong as i think the barrel has a long travel. Does Tamiya use the same recoil unit for every tank ,perhaps they only change the fixing points?

[43rdRecceReg]

Thanks for the info . If i take an average figure its about 30 mm travel . Fitted at max travel the servo hits base of turret ring before max gun elevation. Going to move servo forward and fit a smaller gear. Better check my Tamiya KT recoil , it may be wrong as i think the barrel has a long travel. Does Tamiya use the same recoil unit for every tank ,perhaps they only change the fixing points?

One Tamiya recoil unit p/n 4205024 is used on Seven of their Full-Option tanks, including the Panzer IV. However, the Tiger 1 has a unique recoil unit, whilst the one fitted to the King Tiger is also used on the Jagdpanther.
This means the HT barrel travel will differ (as it should) from all other models, with the exception of the Jagdpanther. Ad Lav has one of those, and maybe he could confirm the recoil distance. My Tamiya KT is partially dismantled at the moment, otherwise I'd measure the barrel travel for you.

[Code501]

I can confirm that the recoil travel on a Tamiya KT (H) is about 30mm.

[ronnie42]

Charged a battery, wish Tamiya went down the lipo 3c route like IBU and Elmod where you can dial in battery type and voltage. Recoil is 35/36mm lines up with 1st groove. Wonder if recoil is voltage dependant , new charged battery giving max recoil?

[43rdRecceReg]

The attachment P4040084.jpg is no longer available

Charged a battery, wish Tamiya went down the lipo 3c route like IBU and Elmod where you can dial in battery type and voltage. Recoil is 35/36mm lines up with 1st groove. Wonder if recoil is voltage dependant , new charged battery giving max recoil?

If you look at this pic of the recoil unit (they all look alike, irrespective of Tamiya model), you'll see that the travel limits are determined mechanically by gearing and end stops; not electronically.. An increase/reduction in electrical power could only affect the speed of the recoil, if anything.

Typical Tamiya Full Option recoil unit