Err-the Hunter doesn't have a tank....you just used the appropriate sized tank for the type of model you were flying, just like most modern motors.The Hunter was also known as the ED 'Mk4'.... Incidentally the Hunter survived into the modern era and was still available in the early 1980s-but looked a lot different to the ones pictured here-though the crankcase was still fairly similar to the original layout.
A quick summary-in case there's still some confusion:
ED Mk1 1cc, rear disc induction, monobloc crankcase with slip in liner, two exhaust ports either side at the rear known coloquially as the 'ED Bee' Introduced 1949
ED Mk2 2cc, sideport induction, metal fuel tank, short crankcase, 'stovepipe cylinder' with all moving head for compression adjustment, usually found with angle exhaust stacks Introduced 1947
ED Comp Spl 2cc sideport induction, development of Mk2, no exhaust stacks, deep exhaust ports, conventional T-shaped comp screw Introduced 1948
ED Mk3 2.5cc, Short crankcase, stovepipe cylinder, scalloped head fins, front induction, with separate rear overhung tank. also available as glowplug Introduced 1948
ED Mk4 3.46cc rear disc induction with cam turned cylinder, finned head, two exhaust ports on right side, long shaft with extended length prop driver Introduced 1949
So you can see that 'Mk number' as far as ED were concerned referred to engine size, and these were not introduced in numerical order. Just to complicate matters, ED's most famous engine-the ED 2.46 'Racer' (as it is known to everyone who uses or owns one) was officially called (by ED) the 'ED MkIII series 2'.....despite having nothing in common with the earlier Mk111 other than a similar size...
To further complicate matters, users and collectors use the words 'Mk' or 'series' more or less interchangably when referring to different models of the same ED engine-and in a different sense to ED, so you have the ED Bee Mk1 (which itself had several minor variants over the period 1949-1956) the ED Bee Mk2 (1955-1963-again with minor variants), the ED Mk4 Hunter with at least 5 submarks or series) and the ED 2.46 Racer with at least 6....
Those familiar with EDs know what we mean with these distinctions-but it can be quite confusing for those who don't-and even then we are not entirely consistent-the last production model of the ED Racer, introduced in 1969-is quite a bit different than the preceding ones-and to EDs was known as the 'Super Racer' but to others simply the 'ED Racer Mk6' or 'series 6' [though internally it was no different from the earlier production models]
ChrisM
'ffkiwi'