Inspired by their beauty, a couple of years ago, I decided to design and build an own horten microlight aircraft, named “Schneewittchen” (“Snow White”).
With this blog, I would like to keep you up to date on the project.
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Schneewittchen – a horten microlight airplane
Schneewittchen is designed to fulfill the requierements of LTF-L (PDF), a class of very light airplanes with up to 120 kg empty weight. The requierements are quiet stringent, including not only the extremely low empty weight, but also a very low stall speed below 55 km/h (corresponds to 30 kn or 34 MPH). With the all-wing concept, Schneewittchen suits very well this class. To keep the weight as low as possible, I decided to use an electric drive (for example a Geiger HPD 10), as accumulators do not count to the empty weight.
Data and specifications
|Average chord:||1.5 m|
|Max. take-off weight:||270 kg|
|Est. empty weight:||120 kg|
|Best glide:||25 at 83 km/h|
|Lowest sink rate:||0,75 m/s at 64 km/h|
|Material:||mixture between carbon composite and wood|
Last blog entries
In our last blog entry we reported how the cooling system was designed and built. The next obvious step was finishing everything so that the electric motor and propeller could run. A propulsion system is a delicate thing: proper cooling, balanced shaft and propeller, well desgined bearing, etc. This is why we had to take …
The last couple of months have been very productive. We used the free days over Christmas and New Year to design and build the drive’s cooling system. A HPD16 from Geiger Engineering with continuous 16 kW (21.5 hp) is quite efficient, but still needs proper cooling. Though not as critical, the inverter also dissipates heat, …
What a year! Pandemic, lockdown, isolation, recession, stock market crash and recovery, protests and elections in the U.S., and Belarus, refugee camps burning in the EU, trade war flaring up again, and a no-deal Brexit knocking loudly at the door. Sounds almost like a screenplay for an apocalyptic film. Well it isn’t. Sad but true. …