Updated 8th of July 2001
Designed and buildt by Haldor Lønningdal
Current status - Retired
|
This is a L39 Albatross, a two seat jet trainer made in the Czech Republic.
|
|
Here you can see the testplane where I tested the wing prototype.
It was flown several times and it worked very well.
Stalls were gentle. The wing was designed to generate good lift.
|
|
The fuselage is halfway built. The front ducts have been glued on and partially sanded.
|
|
The same view but canopy removed. There is ample room for all the components.
|
|
This is where I access the fan and motor.
|
|
The Albatross is finally getting the shape it deserves. This is one of my favourite parts during the building process.
|
|
The same from another angle.
|
|
The reciever and elevator servo is located on a plate of balsa. You slide the flightpack in underneath.
Up to 20*1250cells can be fitted but is not viable because it will add to much weight and screw up the C.G.
The fuselage is fully sanded by now.
|
|
After the successfull flights I put on some paint - it just didnt look right without it :)
Covering of the wing remains... |
|
Luc (right) and me (left) behind our jets. ( only the L39 to the right is mine...)
|
|
Click here for a 1minute video - 3,3MB (AVI. DivX). No sounds unfortunately...
|
This is my very first self designed plane and also my first Jet. A very fun project indeed that also
came out quite well. The testflights were conducted with a 8*1250 pack drawing roughly 200W(avg).
Power felt good - enough for rolls and loops - but not great - it needed more! So I tried 10*1250 and power was up to 300(avg)W.
Now we are talking jet like speeds. Wide loops are possible and low and fast flyby's are great!
Wingloading is high of course high so the landings better be good or else the nose suffers - that is its weak point. Some strengthening
in this area is needed.
Specifications:
- 3channel/2servo control, Ailerons/elevator/ESC
- Wingspan : 32inch (83cm)
- Length : 39inch (100cm)
- All Up Weight : 43oz (1230gram)
- Power : 300W average
Hardware:
- Fan : WeMoTec 480 Minifan
- Motor : Plettenberg HP200/25/4
- Flightpack : 10pack of Sanyo 1250SCRL