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Nov 03, 2017, 11:47 AM
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Do 31 Jubilee – RC VTOL WM


In 1968, the first and only VTOL transport aircraft to date absolved its first complete flight, with vertical take-off, cruise flight and vertical landing. It still holds several world records, brought an enormous gain in technology to the Dornier company and the German Aviation Industryand aroused considerable attention at home and abroad.

50 years later, in 2018, the Dornier Museum will, together with the German aerospace society Deutsche Gesellschaft für Luft- und Raumfahrt - DGLR, celebrate the 50th jubilee of the Do 31 with a series of events, which will also include a model flight meeting, the RC-VTOL- WM, convocated worldwide.

With its developments in the field of miniaturized propulsion and flight control technology, the Model Flying Community is nowadays a pioneer in manned and unmanned aviation.

All model aircraft pilots who own a fully functional jet-powered (turbine or impeller powered by electric motors or combustion engines) Semi-Scale VTOL Surface Aircraft Model with a take-off weight of up to 25 kg and meet the participation conditions are invited to participate in the RC-VTOL-WM.

The RC-VTOL-WM will take place from August 08 to 12, 2018, during the Do-Days on the grounds of the Dornier Museum at Friedrichshafen airport.

At this meeting, the presentation of advanced propulsion and flight control systems for use in VTOL Fixed Wing Aerial Vehicles has priority. Here, in a historic environment and relaxed atmosphere, the innovative Model Flying Community can present its developments to the general public, exchange information among experts and cultivate comradeship and the joy of flying at the same time. The RC-VTOL-WM also includes a series of lectures on the VTOL history, propulsion designs in model flight and a vision of the VTOL future.

Each team entitled to participate will receive a starting bonus in the amount of € 500. A jury will award prices of € 1,000 to € 3,000 to the three best models. 15 models selected by a jury will be admitted.

The closing date is April 28, 2018

Further information and registration forms at
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Nov 03, 2017, 12:46 PM
Nicholas Jacobs
njacobs's Avatar
Originally Posted by Hildegard
All model aircraft pilots who own a fully functional jet-powered (turbine or impeller powered by electric motors or combustion engines) Semi-Scale VTOL Surface Aircraft Model with a take-off weight of up to 25 kg and meet the participation conditions are invited to participate in the RC-VTOL-WM.
Sounds very exciting.

Does the jet-powered restriction "impeller powered by electric motors" mean what we call Electric Ducted Fans (EDF) ?

I would like to point out that the number of RC VTOL built these days are propeller driven (corporate sponsored or hobby). In this Group of RC Hobby VTOL enthusiasts, there are only a few so far that use EDFs, the rest, say 98% are propeller driven. As such it appears (please correct me if I'm wrong), that the latter would not qualify for this contest.

Nov 03, 2017, 05:42 PM
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Ran D. St. Clair's Avatar
It seems fairly clear to me that when they say "Electric Powered Impeller" they mean what we would call EDF (Electric Ducted Fan), so an EDF powered VTOL is welcome.

I gather that they are not open to propeller lift or rotor lift VTOL types. I assume that Since the DO-31 was a jet based VTOL they wish to restrict RC model participation to only jet based, or simulated jet based (EDF based) VTOLs.

There are a few (very few) jet based model VTOLs, and EDF VTOLs are somewhat more common but still rare. RC Model VTOL's are becoming more common but the vast majority are based on propellers. Not counting regular helicopters of various sorts, RC VTOL's with articulated rotors, like the RotorMast V-22 are about as rare as EDF based VTOLS.

Given the restrictions as I understand them, they may get a few participants. While the RC VTOL world is growing exponentially it is starting from a small base, and the vast majority are sport aircraft with propellers, not scale aircraft based on jets. The laws of physics just don't treat jet based VTOL's kindly in full scale or model scale. In full scale they have the advantage of government backing, but for models we really don't, so the cost is almost prohibitive and the resulting performance rather limited.

By the way, The DO-31 was not the only attempt at a VTOL Transport. The XC-142 was a Turboprop VTOL transport that also did not ultimately see military or commercial acceptance. For full scale aircraft, the curse of VTOL and even STOL to a fair degree, is not that it is not technically possible, but that it is not economically justifiable.
Nov 14, 2017, 02:46 PM
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Contest RC-VTOL-WM

There are more details concerning the Contest RC-VTOL-WM in Friedrichshafen next year:

1. All model flight sportsmen worldwide possessing a jet-powered Vertical Take-off and Landing (VTOL) Semi-Scale Surface Aircraft Model are entitled to participate. The propulsion can be effected by:
a. Impeller (powered by electric motors (EDF) or combustion engines)
b. Turbines
c. Mixed propulsion Turbine/Impeller

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