1:4 1928 RRG Professor

[ARUP]

That's a cool model! I wonder why he didn't paint it gray like the full scale?

[ARUP]

Yeas... that Ku-7 is on my 'list'!

[ARUP]

Al, thanks for the compliment! I'm using regular old yellow wood glue. I speed up the adhering process with a hot Coverite iron. I use the iron to bend the ply if needed, too. No water needed. I used contact cement on the Prufling. It works great but if the temps get too high like they did while the model was in the hangar at one of the past Horizon Hobby Aerotows then the contact cement might start letting go. This happened on the wingtips where a curve was forced onto the ply. They stuck back down okay. At 'normal' temps that cement is pretty tough. Wood will break first!

[ARUP]

Hiya, VinceC! Thanks for looking in at the build. I'm going to pretend mine is a transition version so the instrument panel and othe ritems can just remain as they are. Just so long as it looks like a Professor in the air that'll be great!

[ARUP]

Thanks, Chris! What have you on the building boards? The Parabola would be pritt-tee-cool!

[ARUP]

You're welcome, Kevin! This is a lot of fun and if it bring pleasure to others then that's even better!

[ARUP]

Thanks, Len! Another one for your logbook coming right up!

[ARUP]

Thanks, Jim! Did you see the stereo images?

[ARUP]

Thank you, ErichS!

[Tom]

Was looking at the different planes in the link you posted and saw this crazy one (Kupper Ku-7). The wing tips twist to turn and also can go up and down to act as flaps.

Markus Frey built one.....1/2 scale..... http://www.ig-albatros.ch/baubericht...er-ku7-mst-1-2

[Tango Juliet]

There are several "interesting" designs on those pages.

[ErichS]

I came on this thread a bit too late. The Rhȍngeist was the prototype for the Professor built by Schleicher and was intended to replace the RRG Falke. It arrived at the Wasserkuppe in 1928

Kronfeld made 4 very importants flights with the "Rhȍngeist":-

- 30th April 1928: (Probably) the 1st Variometer flight in Gliding-History; starting at the Kuppe with a flight to the Weiherberg and back to land at the Kuppe at the same place he started. The Vario was built into the instrument panel and fitted horizontally and hidden under a leather flap, Georgii, Lippisch, Kronfeld and Nehring knew of it and how it worked.

- 6th August 1928: The Himmeldung (a mountain at the Rhoen) flight; the first official Vario flight. A handful people of the RRG were involved, including Hirth. For the international scene the Vario is a "german secret" untill 1930 when Hirth travelled the US and Kronfeld toured Britain. See photo attached of the Vario

- 14th August 1928: Kronfeld's Record flights at the Rhoen Competition; Duration Flight: 7h54min - Course record: 41 km - Altitude record: 660m --- winning the 9th Rhoen.

- End of January to about 20th Feb 1929: The Rax-Expedition; first international RRG Tour (to Austria), for the first Alpine Expedition. The Tour was lead by Fritz Stamer. Kronfeld made his important flights on the 4th and the 12th Feb.

In 1929, Kronfeld moved on to the Wien, which was basically an improved Professor. The Rhȍngeist was overhauled and reworked, but it made no further records.

I have several photos , including the Rax expedition and a 3-view depicting the cartoon image of the Rhȍngeist which was on the fuselage. Apart from the Vario, nothing seems to be known about the instruments on board. The 3-view can be found here: https://scalesoaring.co.uk/VINTAGE/3.../3-views3.html

Was looking at the different planes in the link you posted and saw this crazy one (Kupper Ku-7). The wing tips twist to turn and also can go up and down to act as flaps.

[Al Clark]

Great stuff, Mike! Great idea on the seat. It all looks lovely. Can hardly wait to see it next fall at our aerotow event. I missed it somewhere, but what glue are you using on the 1/64 ply fuse covering? I used contact cement on my Crested Wren, but then I worried it might eventually let loose.

[VinceC]

I came on this thread a bit too late. The Rhȍngeist was the prototype for the Professor built by Schleicher and was intended to replace the RRG Falke. It arrived at the Wasserkuppe in 1928

Kronfeld made 4 very importants flights with the "Rhȍngeist":-

- 30th April 1928: (Probably) the 1st Variometer flight in Gliding-History; starting at the Kuppe with a flight to the Weiherberg and back to land at the Kuppe at the same place he started. The Vario was built into the instrument panel and fitted horizontally and hidden under a leather flap, Georgii, Lippisch, Kronfeld and Nehring knew of it and how it worked.

- 6th August 1928: The Himmeldung (a mountain at the Rhoen) flight; the first official Vario flight. A handful people of the RRG were involved, including Hirth. For the international scene the Vario is a "german secret" untill 1930 when Hirth travelled the US and Kronfeld toured Britain. See photo attached of the Vario

- 14th August 1928: Kronfeld's Record flights at the Rhoen Competition; Duration Flight: 7h54min - Course record: 41 km - Altitude record: 660m --- winning the 9th Rhoen.

- End of January to about 20th Feb 1929: The Rax-Expedition; first international RRG Tour (to Austria), for the first Alpine Expedition. The Tour was lead by Fritz Stamer. Kronfeld made his important flights on the 4th and the 12th Feb.

In 1929, Kronfeld moved on to the Wien, which was basically an improved Professor. The Rhȍngeist was overhauled and reworked, but it made no further records.

I have several photos , including the Rax expedition and a 3-view depicting the cartoon image of the Rhȍngeist which was on the fuselage. Apart from the Vario, nothing seems to be known about the instruments on board. The 3-view can be found here: https://scalesoaring.co.uk/VINTAGE/3.../3-views3.html

[ErichS]

Love it..no fancy instrument panel back then. Should be a great thermal machine.