Great technique and video. I watch the launch frame by frame. You take a really wide stance before unwinding. I've learning more from this video than if I was there in person. If anyone deserves high frame rate slow motion video, it is you. Thanks for your efforts. My highest launch today.......58' !!!............from which I caught a thermal.
This was my first attempt at videoing the plane while I was flying. I had my iphone strapped to my Tx and so moved the Tx around to follow the plane. I could half watch the plane and the screen at the same time to make sure everything was in line. Worked OK.
Hello Marcus, i like your video very. I also have a MX-20 and am going to tune it for DGl flying. Is it possible to get a copy of your settings file from the MX-20 as a starting point how to make al the settings? Thanks Peter.
Hello Marcus. Its great video with a lot knowlege, my head is boiled :) I'm new in F5J, I was flynig in F3J 30 years ago and have break. Now I try to back and I'm looking whats changed in meantime. I think I will spend a lot of time with this awesome video. There was one thing that interested me the most. Can You tell me how to evaluate the energy of the plane?
Sorry for the late reply, the energy is a function of the speed (Kinetic energy) and height (Potential energy), so look at adding these 2 energies together. E.g. if the plane picks up speed (+Kinetic) and maintains the same height (0 Potential), then overall (Potential + Kinetic = Total) energy has been added to the plane via a thermal. If the plane climbs (+Potential), but slows down (-Kinetic) then overall there was 0 energy added to the plane and it was not a thermal. A little practice and it works well.
Thank you Marcus and even though your video was posted 5 years ago it's still very relevant for pilots who want to extract every bit of performance from their machine especially for competition. Some have stated its too OCD and for them it may be correct for a casual Sunday flier but your precise and complex setup along with extensive tuning efforts I can understand is crucial to achieve the level of performance required in a competition environment.
Interested in starting this. I noticed in all the launch videos I've seen the glider does a rapid ascent. Do you have a seperate mix switch to add in up elevator to do this and then switch off for normal flight? If so what % throw is it? Been flying models for 30years now and gliders have always been my favourite, most recently electric ones but this does look decent.
Hi Marcus. I was fortunate to be given a second hand Vibe as my first, carbon DLG. I'm a late starter at 60.I would like to thank you for taking the time to post a video. For me as a newbie, the information is highly valuable. Thanks again.
@@BillyGates1721 yep, but it only occurs when you are already rolling if you had neither proverse or adverse yaw, you could do rolls without inducing movement in any other axis thats what i would want
Hi all, thanks for the comments. You can find more details of the design by the NASA team on their website here www.nasa.gov/centers/armstrong/programs_projects/PRANDTL/index.html The twist in the wing can also be independently calculated using the Panknin twist formula here b2streamlines.com/Panknin/Panknin.html The wing flies really nicely and has very little to no adverse yaw. You can also search rcgroups for more details If anyone builds a model, then change the airfoils to ones for low Reynolds numbers, the NASA project uses airfoils for very large reynolds numbers. B2 Streamlines has lots of flying wing info for model planes.
I"m pretty sure you'll have to build it yourself. More info here: www.amaflightschool.org/PRANDTL You might find some useful info here: b2streamlines.com/ A project like this will require a fair amount of time. Plus, if you're not already a decent pilot, you'd do well to recruit an experienced RC glider pilot to test it.
Very good, most helpful, I’m watching as much as I can before investing in a glider, 40 years powered model pilot, this is the most exiting next step, many thanks.
Thanks for the video, im into the 1m malibu after the whipit experience hooked me. This was very informative and radio layout is always good to compare peoples solutions for controls. Thanks again ill checkout your other videos hope to see some more in feild tests for tuninig and tips for flight. If your up brisbane way let me know would be great to see first hand and maybe have a little comp tips. If and when there is any up this way...
