The Super Alulah is a mixture between a DIU /Alula & the SportWing. Designed by Robert from Holland. He designed it for FPV use. Its a 120cm flying wing with a little fuselage all made from EPP. I used UHU Por as glue (for the first time) to stick the parts together. Cutting EPP is very easy especially when using a razor sharp knife. The EPP cuts like butter.
I started doing a paint job as we have 3 Super Alulas on our field, this way mine becomes a little more personal and easier to spot.
The hand launch is very easy, just a little toss and of she goes. Without dual rates installed the Super Alula is very agile and capable to turn fast & furious. The bird changes in a very docile platform when having dual rates at 60. Even on 50% she flies very easy and is easy to fly even for beginners. The wing profile makes it easy to fly the Super Alula very slow and still produces a nice amount of lift which is great for FPV. When trying to stall the Super Alula it will only show a a small hop to level and it flies on. Not sure if that is called a stall. Even on very slow flights the Super Alula keeps on going. On moderate speed I can fly for about 12 minutes on a 1000MAh LiPo which also powers the FPV transmitter and camera. On a 1300MAh 3S I even flew 22 minutes. Although it is no glider it has a nice glide path when the COG is at the right position.
LC Filtering As I use 1 LiPo for RC & Video, the change is big to have my ESC poluting my power source for video which will lead to stripes on my monitor. Making and installing a LC filter will clean up the juice before it enters the video circuit. Wanna learn more about LC-filtering? On the bottom of this article are 3 useful links. Including a Dutch making of a LC filter video.
Depron elevons The epp elevons were very flimsy and needed a cf strip or had to be laminated. I didn’t succeed in adding a CF strip and laminating was also a disaster. So I used 6mm Depron and hinged them with Uhu Por. The Depron is stiff enough and doesn’t need any carbon fibre strip nor tape. So a 5 stars rate for Depron!
Dipole antenna My HK-6X RC tx & Corona rx combination is maybe the worst system for FPV. In combination with my 5.8GHz video transmitter my RC range dropped like a brick to a silly 200m. I heard about dipole antenna’s and asked BlueFalcon for a set. By adding dipoles to the RC rx the range can suddenly increase 3-4 times. I range tested the new configuration to 700m on the ground. So a set of good ears on a RC rx works.
CL/SPW antenna For better range and better video quality Remy made me a set of cloverleaf antennas. The set works circulair as omni antennas work linear. The new antennas give an interference free and a more colorful video no matter how the position of the Super Alula is in the air.
Going FrSky D8R II I got myself a new transmitter/receiver combination which uses FrSky. With the new combination a new rx had to be placed in the Super Alulah. The old Corona receiver was situated in the fuselage underneath the wing. I placed the new D8R II in the wing which allowed me to place the dipoles on the wingtip. After doing a ground range test my RC range (5DBi antenna) seemed to have increased by 3 in relation to my old system (HK6-X/Corona/dipoles).
Robert for making the kits & dipoles available, Remy for answering all my questions and building me a 5.8 GHz CL/SPW combination. Jacques for making me a new cloverleaf. Ray for giving me a nice tripod, SPW and more.
– Easy to build & fly
– No stall
– Very durable & dense EPP
– Can be flown agile and docile
– Can stay up quite long
– Stable, even at almost no airspeed
– Handles wind quite nice
– Great bang for bucks
– Enough room for electronics
– Cheap setup (prop, motor, ESC, servo’s & LiPo)
– Very limited, so hard to get
– Original EPP elevons
Like the easy handling, just great. Please keep going and thankx alot for sharing your knowledge. Would like to follow you but do have no clue about building this epp-plane nor possible to buy it. I am happy for you, you for sure earn this uniqueness. Peter