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RMI -- Hungarian Aircraft Designations

Apophenia

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RMI Aircraft Designations

RMI stood for Repülo Muszaki Intézet or Aviation Technical Institute. Aircraft were primarily (but not exclusively) designed for RMI by László Varga. As a result, RMI designs are often given the Varga name (in some cases, even when he was not a major designer).
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RMI-1 X/H (unflown recce bomber with turboprops (Jendrassik CS-1), designed by Laszlo Varga
- RMI-2 X/H: Sóstó-built prototype was intended to be re-engined with WM DB605s in 1944 but destroyed before flying. Likely, re-engining never occurred (see Reply #13).
http://internationalresinmodellers.com/yahoo_site_admin/assets/images/Varga_RMI-1_landing_gear_doorsR.161133553_std.jpg

RMI-2 X/G Honvéd - 1943 twin-engined crew trainer of mixed construction (wooden wings, steel tube fuselage structure).
- RMI-2 X/G: Prototype flew mid 1943. Destroyed by US bombing in 1944
- RMI-2 X/G: 2 x 240 hp Argus As.10C IV-12s, span: 14.00 m
- RMI-2 X/G: Length: 10.6m, height: 3.5m, empty weight: 2,300 kg, T/O weight: 2,900 kg, maximum speed: 275 km/h, range: 600 km, ceiling: 6,000 m, 2 x 240 hp Argus As.10C
-- http://balaton-modell.gportal.hu/gindex.php?pg=3083346&nid=1377863

RMI-3 Z/G - divebomber trainer version of X/G, mixed construction, built '43, destroyed '44.
-- NB: some sources call the RMI-3 Z/G the Fábián Honvéd. András Fábián did design a twin engined trainer (four delivered to the LüH but it's not clear if this was the RMI-3 design.
- RMI-3 Z/G: 2 x 105hp Hirth HM-504/A2, span 10.00 m
- RMI-3 Z/G: Length: 7.5m, height: 2.6m, empty weight: 900 kg, T/O weight: 1,350 kg, maximum speed: 300 km/h, range: 500 km, ceiling: 8,000 m,
-- http://balaton-modell.gportal.hu/gindex.php?pg=3083346&nid=754095

RMI-4 Z/G - (Project?) light bomber version of RMI-3?

RMI-5 X/U - (Project, model only or mockup?) 20-pax airliner, 4 x 480hp Argus As.411
-- http://balaton-modell.gportal.hu/gindex.php?pg=3083346&nid=669522

RMI-6 Szúgyog (Mosquito) - experimental a/c (flight controls), tricycle-u/c
- RMI-6: 1 x 45hp Czech Zlin Persy II engine, destroyed by bombing in 1944.
-- http://balaton-modell.gportal.hu/gindex.php?pg=3083346&nid=669561

RMI-7 V/G - side-by-side trainer, Argus As.410, retractable u/c, prototype 1944, unflown?

RMI-7 V/G - span: 9.54m, length: 7.81m, height: 2.5m, empty wt: 1,200 kg, T/O wt: 1,680 kg, maximum speed: 360 km/h, range: 1,000 km, ceiling: 8,000m
-- http://balaton-modell.gportal.hu/gindex.php?pg=3083346&nid=765457

RMI-8 X/V - controversial twin-boom, twin DB605 fighter design. Prototype (X/V-01) said to have been destroyed by bombing while airframe still incomplete in April 1944. Also called the Marton X/V after its designers, Vilmos and Dezso Marton (assisted by László Varga).

RMI-8 X/V - span: 11.8m, length: 10.2m, height: 3.5m, empty weight: 2,850 kg, T/O weight: 3,800 kg, maximum speed: 800 km/h, range: 1,000 km, ceiling: 11,500 m
-- http://balaton-modell.gportal.hu/gindex.php?pg=3083346&nid=617623

RMI-9 M/G (or Me/G) - Bf-109 pilot trainer, built but destroyed by US bombing in 1944.

RMI-9 M/G - span: 9.5m, length: 7.2m, height: 2.3m, empty weight: 1,100 kg, T/O weight: 1,480 kg, maximum speed: 350 km/h, range: 700 km, ceiling 9,200 m, 480hp Argus As-411
-- http://balaton-modell.gportal.hu/gindex.php?pg=3083346&nid=754109

RMI-10 X/S (Project only?) military transport glider (in competition with Rubik R-21?)
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zanenobbs

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The Varga RMI-1 X/H illustration on Balaton-Modell is not correct for the re-engine version (with the DB605) because in the illustration the engine cowlings are for a radial, air-cooled engine, when the DB605 was a water-cooled V type engine. This would have had exhausts going in a row down each side of the engine, as in the photographs of the workshop.
 

Apophenia

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zanenobbs said:
The Varga RMI-1 X/H illustration on Balaton-Modell is not correct for the re-engine version...
Correct. The Balaton-Modell image appears to illustrate the RMI-1 X/H prototype as originally fitted with the Jendrassik Cs-1 turbines.
 

zanenobbs

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Thank you, however, with the turbine shouldn't there be an exhaust at the rear? My understanding is that the Jendrassik Cs-1 turboprop had a rear exhaust similar in appearance to that of the Campini-Caproni CC.2 engine or the Junkers Jumo 004s and BMW003s. Is this not correct?
 

Apophenia

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Quite right, and well spotted. Obviously that image was a botched attempt at representing the DB605 conversion ???

I've eliminated that link.
 

hesham

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Hi,

there was a Varga Káplár I & Káplár II,a two-seat trainer airplanes ?.
 

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c460

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Hi Hesham,
Please, in what book or magazine did you find this?
 

hesham

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My dear Adrien,

the source is here;

https://library.hungaricana.hu/en/view/ORSZ_KOZL_TechnTortSzle_05/?query=SZO%3D(iskola)&pg=133&layout=s
 

c460

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Thank you, this is a fascinating document.
 

hesham

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hesham said:
Hi,

there was a Varga Káplár I & Káplár II,a two-seat trainer airplanes ?.
The translation;

László Varga, Káplár I "and, Káplár II" upper wing, stiffened, two-seater,
school airplane with single-acting streamlined chassis 105 hp Hirth HM 504 A-2
engine. A, Káplár "in the 1938 design contest in two versions, altogether
It was built in 4 copies as an experimental sludge machine. Ferenc Lettner in his design,
Elemér Rácz and Imre Szabó worked together. The first two machines are still on
It was built in the Székesfehérvár Aircraft Repair Plant, and the other specimens are
They were built at the Aerotechnics Institute and Esztergom. A, Káplár "exact size
data is not available, but more views and photos are known. Smax:
180 km, traveling distance: 150 km / h, landing speed .: 75 km / h. Jibs,, Káplár I ": 1-301,
302,,Káplár II ": I-303, I-304, I-305, and so on.
 

zanenobbs

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This is the International Resin Modellers Association fourth kit. You can find the history here: Articles 13 Varga RMI-1 X/H ( ), the build here: Articles 14 Building the 1/72 IRMA Kit No. 4 Varga RMI-1 X/H ( ), and pricing at the IRMA On-Line Store ( ). From my research, it looks like the Varga RMI-1 X/H was actually never re-engined with a DB 605. None of the existing photos display the DB 605 exhausts and in the wreckage photos, there is no sign of the DB 605 with the RMI-1 X/H. The DB 605 is present in the Varga RIM-2 X/G wreckage.
 
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zanenobbs

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From the Winkler Archiv photo, found online and also in the book A Magyar Királyi Honvédeség Fegyverzete on page 437 (lower right), the aircraft in the Varga Workshop is NOT the RMI-1 X/H, rather it is the RMI-2 X/G. Notice in the photograph that the horizontal windowpanes line up across the canopy, yet in the drawings and illustrations for the RMI-1 X/H, the horizontal windowpanes do not line up, instead they form a pattern of -_-_--- while those of the RMI-2 X/G are -------. The airframes for the X/H and X/G were nearly identical, save for differences to accommodate the engine types and landing gear.
 

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zanenobbs

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With all due respect, the drawing in A Magyar Királyi Honvédeség Fegyverzete on page 436, is not the Varga RMI-1 X/H, although it is labeled as such. The RMI-1's landing gear retracted inward, while the RMI-2 X/G's retracted into the engine nacelles. I'm finding this book and the Winkler Archiv to be increasingly questionable.
 
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