I cannot help but thinking of V-tail each time I encounter its related subject. My thought is ... Observation obtain with hinged V-tail as justification for V-tail platform in general may be one behavoir of a feature seeker. Am I one myself?. V-tail operated by elevon do not necessary share effect and response equal to an experimental V-tail on spindle (no [stab+moving] surfaces). Elevon has adverse pitch effect at rudder function, it will cost the glider total energy loss, if adverse pitch is not compensated with differential elevon set. That brings out the next question of, how to determine the amount of adverse and direction, work out a compensation plan, implement and verify it? On the other hand, the spindle V-tail if adopted for its higher efficiency will defeated the hallmark of V-tail, light weight, stiff and indestructable almost. YK Chan Seattle area. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]

