Romanian IS Designations (Iosif Silimon)

[Apophenia]

Designations of Romanian Designs by Inginerul Iosif Silimon
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IS (Iosif Silimon) Series Designations

While employed as an IAR Brasov engineer in 1949, Iosif Silimon completed his first glider built at and for the Aeroclubul Sânpetru (Sânpetru was a small village neighboring Brasov). The designation may have been IS-1-2 but was more likely IS-2.

Production and development of Iosif Silimon's designs were then undertaken by the successors to IAR-Brasov, URMV-3 (Uzinele de Reparatii Material Volant-3, 1950-1959) and ICA Brasov (Intreprinderea de Constructii Aeronautice).

These gliders and aircraft all retained the IS prefix until very lately when IAR designations (and re-designations) began to appear.
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IS (Iosif Silimon) Series Designations - URMV-3/ICA Brasov

IS-1 -- [??] some sources list first glider as 'IS-1-2'*
-- * NB: 'IS-1-2' is probably confusion with ICAR-1-2 training glider
IS-2 -- 1949, first glider built at/for Aeroclubul Sânpetru
IS-3 -- 1953 wooden glider followed by a range of sub-type variants (below)
-- variants: IS-3, IS-3a, IS-3b, IS-3c & IS-3d (1956), IS-3e (1958), IS-3f (1959)
IS-4 -- 1958 ICA-Ghimbav glider
IS-5 -- 1961 ICA-Ghimbav glider
IS-6 -- ICA-Ghimbav glider
IS-7 -- 1958 ICA-Ghimbav glider
IS-8 -- 1960 ICA-Ghimbav glider
IS-9 -- 1959 ICA-Ghimbav glider
- IS-9A: 1960 motorglider version of IS-9 glider
IS-10 - 1960 ICA-Ghimbav glider
IS-11 - 1957 ICA-Ghimbav glider
IS-12 - 1962 ICA-Ghimbav glider
IS-13 - 1962 ICA-Ghimbav glider
IS-14 - [??]
IS-15 - [??]
IS-16 - [??]
IS-17 - [??]
IS-18 - 1965 ICA-Ghimbav glider
- IS-18/25: 1969 ICA-Ghimbav glider
IS-19 - 1967 ICA-Ghimbav glider
IS-20 - [??]
IS-21 - [??]
IS-22 - [??]
IS-23 - 19?? multi-purpose light aircraft
IS-24 - 19?? utility/sport light aircraft
IS-25 - [?? same as IS-18/25 ??]
IS-26 - 1969 ground effect test vehicle (see Maveric's images below)
IS-27 - [??]
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IS (Iosif Silimon) Series - Marketed with 'IAR' as Maker or Re-Designated

IAR IS-28 - Lark, 1970 2-seat tandem sailplane, all-metal structure
- IS-28: 1970 sailplane, 15m span, fabric-covered control surfaces
- IS-28B: 1973 sailplane, 17m span, performance flaps + airbrakes
- IS-28B1: 197?, detail differences from IS-28B, eliminates flaps
- IS-28B2: 1974 detail differences from IS-28B, retains flaps
- IS-28M1: 1977 Motor Lark motorglider vers. IS-28B2, 1 x 68hp Limbach SL.1700 E1
- IS-28M2: 1976 Motor Lark side-by-side motorglider, 1 x 68hp Limbach SL.1700 E1
-- IAR-28MA - IS-28M2 with new wing, split flaps, 1 x 80hp Limbach L.2000 E01
-- IAR-34: later redesignation of IS-28M2 Motor Lark
-- IAR-46: IS-28M2 dev. as light trainer, 1 x 80hp Rotax 912 F3/A3
-- IAR-46: prototypes built but lack of funding/certification problems

IAR IS-29 - Lark, single-seat version of IS-28, 200+ built
- IS-29B: single-seat equiv. of IS-28B, 15m span wooden wings
- IS-29D: 1970 metal-winged dev. of single-seat IS-29B Lark
- IS-29D2: 1975 retractable u/c, camber-changing flaps, airbrakes
- IS-29D2 Club: retractible u/c, camber-changing flaps, airbrakes
- IS-29E: 1971, single-seat, open-class version with ballast tanks
- IS-29E2: vers. of IS-29E with extended 19m span wing
- IS-29E3: vers. of IS-29E with extended 20m span wing
- IS-29EM: motorglider, comb. IS-28M2 fuse. and u/c with IS-28MA wings
- IS-29G: club version - 16.5m span, flapless wing, fixed u/c

IAR IS-30 - 1978 Twin Lark, IS-28 club var., metal surfaces, fixed u/c, no flaps

IAR IS-31 - single-seat sailplane (IS-29E3 var.), 20m wings, linked flaps/ailerons

IAR IS-32 - 1977 long-span IS-28B2 dev., new 20m double-taper wing, 15 built

IAR IS-33 - IS-29 variant with 150 kg (300 lb) of water ballast tanks

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[hesham]

Hi,


IS-6 and IS-10 were also a gliders.

 

[Apophenia]

IS-6 and IS-10 were also a gliders.

Cheers Hesham! Do you have dates for those designs by any chance? Or details for any other IS designs?

 

[Maveric]

IS.10...

 

[Maveric]

I.S.26 was a ground effect test vehicle

 

[Maveric]

Nothing info about I.S.6.
I.S. 10 was built in 1960 and the I.S.26 1969. Do you need more info...?

 

[hesham]

IS-6 and IS-10 were also a gliders.

Cheers Hesham! Do you have dates for those designs by any chance? Or details for any other IS designs?

Sorry my dear Apophenia,


no data I have for IS-6,and I don't know which year it was built.

 

[Apophenia]

Excellent stuff guys! Thanks for filling the gaps