Engine deck: Feifel air cleaner trunking and retaining brackets

- Close-up of port side air cleaner bracket installed in raised position.jpg (24.76 KiB) Viewed 10560 times
Although the actual Feifel air cleaners were no longer fitted to Tigers by the time mine was built (October 1943) the trunking and brackets for the air hoses continued to feature on mid-production tanks until the appearance of the gun travel lock (which would have blocked the starboard cleaner anyway).
The original HL tubes are held onto the decking in roughly the right place by two over-large brackets, although the Tamiya RC kit is actually little better (however the Tamiya sprue does have a better scale alternative without a screw attachment which was presumably for the static version of the model).
The real tube clamps consisted of partially threaded rods with a fixed lower bracket and movable upper bracket held in place by bolts. Each of these brackets had a rectangular shaped 'chock' which ensured that the outer tube stayed flush with the engine deck while the inner one was raised a little higher.
The lower bracket was easily made from plastic strip of suitable width and thickness, but I decided that the upper bracket really needed to be metal otherwise it was liable to warp or break. Although I have various bits of brass strip I found that part of large staple from a Jiffy bag was just right. This also proved rather easier to drill into using my hand-held rotary tool (made easier still by first taping down the metal strip to a cork block).

- Air-cleaner hose retaining bracket upside down.jpg (39.03 KiB) Viewed 10560 times
Meanwhile the rectangular 'chocks' were fashioned from thin brass strip. Like all my metal-to-metal or metal-to-plastic joins I used
Unibond Repair Extreme Power Glue which dries with a certain amount of elasticity but allows any excess to be easily shaved or sanded away.
The rods themselves were a little more of a headache. Clearly what is needed here is some partially threaded brass rod, but I have no idea where to find it and I bet it isn't cheap. Then I had a small brainwave - using track pins. These are the Taigen ones that come with their metal tracks and they come with a fairly convincing thread pattern at one end. Having cut them to size they were inserted into holes drilled through the lower brackets and the hull with care taken to ensure they were straight - and the same height.

- Lower brackets and retaining rods in place.jpg (25.27 KiB) Viewed 10560 times
Then it was just a matter of inserting the upper bracket onto the rods. Luckily it was a perfect fit! Since my Tiger is hardly factory-fresh I decided to save myself some work and leave the starboard upper bracket off - after all these had absolutely no useful function without the Feifel system installed and, positioned as they were on the hatch cover, would have been liable to damage or loss.

- Port side air cleaner bracket installed in raised position.jpg (30.17 KiB) Viewed 10560 times

- ...and in its collapsed position - but awaiting suitable retaining bolts.jpg (29.88 KiB) Viewed 10560 times
As I understand it, without the piping in place, the upper bracket would simply slide down the rods, although since mine remains movable I'm going to hedge my bets! All that remains are the hexagonal bolts to go on the top. I will either make these from plastic card or perhaps shave some off a spare side mudguard.

- The underside of the HL Feifel trunking with ends trimmed back & hollowed out, underside filled and clamps added.jpg (27.11 KiB) Viewed 10560 times
The trunking itself is adapted from the HL part - which, by the way, is identical to the Tamiya one. Once the ends are cut back and hollowed out the underneath needs a little filling (I used trusty Milliput) and finally clamps added. These were early efforts made simply by bending loops of thin wire - not bad from a distance although I am tempted to replace them with the correct Aber photo-etch versions...

- This view shows the hollowed-out trunking, hose retaining rods and lower brackets, new Tamiya hatch catch and triangular cover plate.jpg (27.33 KiB) Viewed 10560 times
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