guys; I have a very short airstrip, so short you can´t call it airstrip, just a patch of grass, my take off technic works pretty fine, standing still, WOT, no flaps, start ground roll until I reach 35Kt full flaps and it will jump in the air shorter than starting the ground roll with flaps; conversely when I coming in for landing as slow as I can full flaps; touch down at 37kt (I´m heavy @$$pilot) kill the flaps and it will stay on the ground; if I leave the flaps on, I will be hoping along until I run out of space.- Playing with the flaps does have a good effect on short take off and landings.- Though I would love to try the suggested modifications of Riblett on the undercamber to improve cruise speed without sacrificing the take off roll.- Regards Dimi3
Hello Turbo; Some time ago there was a discussion about a better airfoil and the usage of the VG on the bottom of the wing, one member tried it without luck, however there is a letter from Riblett saying that Avid airfoil will not sacrifice STOL performance taking the bottom section of Riblett GA35-614; where the top of the wing remain untouched (Avid original airfoil) and the bottom will have same as GA35-614. I have not heard anyone that has applied this modification to the bottom of the wing, but as it looks like will give the best out of the 2 worlds with little modification to the wings.- Regards Dimi3 p.s. here is the link to the discussion including the letters (pictures) in question.-
I have a model B, and all what I can say is that Avid is a pretty little airplane, only complain I will make is that leg room is a problem, I`m 180cm tall and have problems with the pedals and placing my feet correctly, one time I did a ground loop without impacting anything simply because while applying brakes on a my short strip the tip of my right toe(shoe) got caught in the framework and I though I was braking but I wasn´t so I did a left hand ground loop.- I´m hesitant to go for the bush gear because it´s taller and I recon it will take less to bend the legs; are you going to install all the mods you had in the B model? such wingtip vortex, etc, etc, etc??
Dynaero MCR airplane is performing near the same, nothing new, there are other examples, blackwing is not pioneer in this technology, itÂ´s just another all carbon composite down to the control stick and it came out lighter than anticipated.
I also want to mention that the only one who I ever heard had any type of effect by modifying the wing tip is John Miller placing Vortex generator there; he has a full report over the other side of the river (the dark side) I believe Randy also installed VG on the wing tips...
for those curious about 150hp Rotax; there is a Norwegian company who thought, regular 80hp rotax was over complicated and overkill NICE little ENGINE, so they began removing useless systems and parts to make it nicer and cleaner they came up with a pretty nice upgrade to that engine.
I have some friends here in Sweden that are building a new aircraft and as far as I heard; wing tips are only a tangible advantage; when you are flying more than 200kt or 10000ft and above; somewhere there canÂ´t recall the exact numbers, basically top end airplanes and airliners are really making use of these advantage. Rest is just cosmetic.
Their original design didnÂ´t have wing tips because it wasnÂ´t necessary, but they got hold of a Rotax turbo engine 150Hp and the airplane performs just within that range, now the plane is suited with wing tips.