Grifflyer
WWII fanatic
A little over a year ago I released my second EDF jet, and it was my first jet that was based off of a full scale counterpart. My main goals with that design were to make it a relatively easy build while still having it resemble the L-39, as well as giving the builder the ability to fly it with a 50mm EDF, or an equivalent to the FT F pack. After flying it for a year or so I started to notice how boxy everything was, and I found lots spots where I could make the design a little easier to build and more importantly, look a lot better.
So this time my goal was simply to retain or improve the flight characteristics, while getting the model to look more like the full size L-39. This is the end result!!
The biggest changes I've made are adding many more facets, and changing up the geometry of the intakes as well as other curves. Aside from a slightly bigger horizontal stabilizer the plane has the same wing and vertical stabilizer so the flight characteristics of the original model are carried over into version two. The power system has not changed so if you've built V1 you can build version two.
I am proud to announce that I'm receiving help from @Zephyr1 to test out this design with a 70mm EDF power system.
Overview-
Speed-
Top speed is great and slows down very well for landing. I was able to clock V1 doing 64 mph at Flite Fest and V2 definitely feels a tad faster, so I'll say it is the realm of around the 70 mph.
Handling-
The L-39 tracks like an arrow and the controls are very smooth giving you the ability to fly like a pattern ship, but it can become "snappy" and abrupt when you really start banging the sticks around.
Stalls-
If your plane stalls it will likely drop a wing but it is nowhere near entering a spin, all you have to do is level the wings and then power out.
Aerobatics-
Since the plane lacks a rudder the aerobatic ability is limited to the basics such as, Loops, Rolls, Inverted, Split S's etc.
Take offs-
I like launching this plane by holding it right in front of the wing and giving it a really strong toss, you really need to give this bird a solid toss or else it won't have enough airspeed to sustain flight.
Landing-
Landing this model is quite simple all you need to do is bleed almost all your airspeed and get it close enough to good 'ol terra firma to put ground effect to work, then right before to hid land, flare the plane and you'll "ride" a cushion of air to the ground.
Skill level-
I'd want to wait until I've flown at least one unforgiving plane that flies quite fast and taught you how to avoid stalling.
Plans: Aero L-39 Plans V2.1
Flight Video:
So this time my goal was simply to retain or improve the flight characteristics, while getting the model to look more like the full size L-39. This is the end result!!
I am proud to announce that I'm receiving help from @Zephyr1 to test out this design with a 70mm EDF power system.
Overview-
Speed-
Top speed is great and slows down very well for landing. I was able to clock V1 doing 64 mph at Flite Fest and V2 definitely feels a tad faster, so I'll say it is the realm of around the 70 mph.
Handling-
The L-39 tracks like an arrow and the controls are very smooth giving you the ability to fly like a pattern ship, but it can become "snappy" and abrupt when you really start banging the sticks around.
Stalls-
If your plane stalls it will likely drop a wing but it is nowhere near entering a spin, all you have to do is level the wings and then power out.
Aerobatics-
Since the plane lacks a rudder the aerobatic ability is limited to the basics such as, Loops, Rolls, Inverted, Split S's etc.
Take offs-
I like launching this plane by holding it right in front of the wing and giving it a really strong toss, you really need to give this bird a solid toss or else it won't have enough airspeed to sustain flight.
Landing-
Landing this model is quite simple all you need to do is bleed almost all your airspeed and get it close enough to good 'ol terra firma to put ground effect to work, then right before to hid land, flare the plane and you'll "ride" a cushion of air to the ground.
Skill level-
I'd want to wait until I've flown at least one unforgiving plane that flies quite fast and taught you how to avoid stalling.
Plans: Aero L-39 Plans V2.1
Flight Video:
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