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F4 [15] is a paper size 210 mm × 330 mm (8.27 in × 13.0 in). [16] Although metric, based on the A4 paper size, and named to suggest that it is part of the official ISO 216 paper sizes, it is only a de facto standard.
A non-standard F4 paper size is common in Southeast Asia. It is a transitional size with the shorter side of ISO A4 (210 mm, 8 + 1 ⁄ 4 inch) and the longer side of British Foolscap (13-inch, 330 mm). ISO A4 is exactly 90% the height of F4. This size is sometimes also known as (metric) 'foolscap' or 'folio'.
Despite imposing dimensions and a maximum takeoff weight of over 60,000 lb (27,000 kg), [55] the F-4 has a top speed of Mach 2.23 and an initial climb rate of over 41,000 ft/min (210 m/s). [56] The F-4's nine external hardpoints have a capability of up to 18,650 pounds (8,480 kg) of weapons, including air-to-air and air-to-surface missiles ...
Successive paper sizes in the series (A1, A2, A3, etc.) are defined by halving the area of the preceding paper size and rounding down, so that the long side of A(n + 1) is the same length as the short side of An. Hence, each next size is nearly exactly half the area of the prior size. So, an A1 page can fit two A2 pages inside the same area.
It is also possible to install Pave Spike targeting pods and rocket pods of all sizes. [11] [13] These upgraded F-4 Phantoms are referred to as the F-4E-2020 Terminator. 54 were modernized and 30+ of them will be in service until at least 2030. [14] They first entered service on 27 January 2000 with deliveries to 111 and 171 Filo. [15] QF-4E
A 100 mm focal length f /4 lens has an entrance pupil diameter of 25 mm. A 100 mm focal length f /2 lens has an entrance pupil diameter of 50 mm. Since the area is proportional to the square of the pupil diameter, [6] the amount of light admitted by the f /2 lens is four times that of the f /4 lens.
I love how size-inclusive it is — ranging from XS to 6XL — and that it comes in 26 colors. "They are the perfect weight to use as a layering piece," this fan said. "I did go up a size to allow ...
FIA Formula 4, also called FIA F4, is an open-wheel racing car category intended for junior drivers. There is no global championship, but rather individual nations or regions can host their own championships in compliance with a universal set of rules and specifications.