Hello, this is my first post here. I set out to make an efficient glider, with a simple launch mechanism. After a lot of trial & error and refinement I found a design which seems to allow infinite unpowered flight! Key Features: All vanilla parts Able to climb unaided (tested to over 10,000m from a starting point of 600m) Able to take-off from a taxi-speed of just 20m/s Stable flight (Some front/back pivoting might be improvable) Loop-the-loop / Corkscrew / etc easily achievable Able to maintain flight with less than 100m altitude Comes with a push-launcher which takes off automatically! Tips for flight: Using the launcher (affectionately called 'The Skate') On the runway, set thrust to max, and start the engine. No need to lift off! Trust in The Skate. When it reaches the end of the runway it will take off on it\'s own and start to climb. By about 500m altitude it will be pointing straight upwards. At this point cut the engine power (X) and release the engine coupler (spacebar). Assuming the engine didn\'t just plough into your face, you now have control of the glider! Gear-up, roll it right-side-up and off you go. Gliding / Gaining Altitude There\'s a couple of techniques for climbing but the best seems to be maintaining a tight turn. Wait til you have over 60m/s ground speed, roll the plane so that it\'s wing-plane is almost vertical (ie you\'re rolled over about 80 degrees) and pull up. With a little practice you\'ll find a sweet spot where the planes nose is angled up and the plane climbs fast. You may find alternating between levelling-off to gain speed and tipping up into a turn works best if you can\'t find the sweet spot or don\'t have the starting speed. For the most part you will find you gain altitude just by flying around and you won\'t have to work that hard. The hardest part is landing! It has so much lift that it\'s near impossible not to overshoot the runway, so best to just use flat grass. GD-09A GD-09A-S (with 'The Skate' Launcher) I\'ve attached the craft files both with and without the launcher. I\'m hoping people might try other launch methods, as The Skate is far from perfect. Dropped from a rocket might be cool. Also if anyone wants they can try and stabilize the front/back wobble (I call this 'The Washing Line'). It doesn\'t affect flight much but looks ridiculous. -- UPDATE -- Worked a bit more on an updated version of the plane and a more practical launcher: GD-10A GD-10A-S (mounted on heavy launcher) The plane handles much the same but a bit less bouncy, and landing is a little easier. The launcher is more bulky but more usable/controllable. Again, throttle up high, and when airborne and up to speed, cut the engine and detach the plane (pull up to depart quicker).