Of these, one was designated L 84E and was tested with the Rolls-Royce Kestrel IIIS engine; another, L 84F, was fitted with a fuel-injected version of the BMW VIu.
Among them, one was labeled L 84E and underwent testing with the Rolls-Royce Kestrel IIIS engine; another, L 84F, received a fuel-injected variant of the BMW VIu.