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  1. R

    A 55% SR-71 Blackbird under construction!

    I just bumped into this, never heard about it before: https://www.orange-aerospace.com/about-us/projects/scaled-lockheed-sr-71 Airframe production appears to be roughly halfway. Holy moly! I worked with the founders to build a few 5.5 meter span UAVs, some 10 years ago, when they were also...
  2. R

    Anyone recognize this homebuilt? French design possibly

    On an auction site in the Netherlands, a partially built wooden twoseater homebuilt is offered. The seller doesn't know what it is, neither do I :-) ≥ Vliegtuig van hout, ware grootte!! Lijkt type Bleriot xi — Modelbouw | Vliegtuigen en Helikopters — Marktplaats Anyone recognize this...
  3. R

    Looking for an aerodynamic model (polar) of the F-84F Thunderstreak

    I'm looking for an aerodynamic model (polar) of the F-84F Thunderstreak. Does anyone know of one in the public domain? Previously I found one of the F-104A, in a NACA report, and one of the BQM-34A target drone in an AF report. And for my Me 163B website I found a few too: Me 163B polars I...
  4. R

    Does a Rotax 586 exist?

    I'm researching the General Atomics Gnat 750, the UAV from around 1990 that can be seen as the predecessor of the Predator. Only a few were built, and the available data is very limited. Usually the Rotax 532 and 582 are reported to be installed, and I can find plenty on these engines: spare...
  5. R

    BD-5A/B factory engines study

    With the recent thread 'BD-5 - Why is it so engrained in our psyches?' running, I finished a small study on the BD-5A/B factory engines, and put it online. I always found the history of the factory engines confusing and vey difficult to understand. But with some effort the complete engine...
  6. R

    Which homebuilt design is this?

    On a Dutch auction site, this aircraft appeared today. I can't link to an image, only the auction page itself: ≥ Te koop zweef vliegtuig project opknapper professioneel - Modelbouw | Vliegtuigen en Helikopters - Marktplaats.nl Does anyone know which design this is? Just out of curiosity - I...
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