The Bartel BM-3 was a prototype Polish training aircraft and biplane, designed by Ryszard Bartel. Although ~3 prototypes were made, the aircraft never flew.[1]
| Bartel BM-3 | |
|---|---|
 The Bartel BM-4, which was very similar to the BM-3 | |
| General information | |
| Type | Trainer aircraft |
| National origin | Poland |
| Built by | Ryszard Bartel |
| Number built | ~2 |
| History | |
| First flight | Never flew |
History
editDue to the fact that the first competition for aircraft design in 1924 did not result in a result in the category of training machines, in order to meet the needs of the ITBL, in June 1926 it announced a second competition solely for a training aircraft capable of performing full aerobatics. Two engines were to be used to power the plane: Austro-Daimler 200 HP and SPA-6a 200 HP (used, among others, in Ansaldo A.1 Balilla and Oeffag D.III).[2][3]
The results of the competition were announced in December of the same year. Ryszard Bartel's design, BM-3, took first place, beating ST-4 and PWS-2. The design involved extensive standardization of parts: the lower and upper wings, ailerons, and horizontal tail halves were interchangeable, and the spars and fittings were identical.[4][5]
Two prototypes were ordered in September 1927, with delivery scheduled for February 1928. However, the financial crisis of the "Samolot" studio and Bartel's design work on a new plane, the BM-4, delayed the execution of this order. However, the designer, using the experience in building the Bartel BM-2 and Bartel BM-4 aircraft, proposed a new, improved type of Bartel BM-5 instead of the BM-3. The proposal was accepted and instead of the BM-3, BM-5 prototypes were made.[6]
Technical statistics
edit- Crew: 2
- Length: 7.9 m
- Height: 3 m
- Span: 11.77 m
- Wing area: 31.9 m2
- Empty weight: 820 kg
- Payload: 380 kg
- Total weight: 1200 kg
- Drive: 1 × Austro-Daimler inline engine with a power of 225 HP or SPA-6a with a power of 200 HP
- Maximum speed: 182 km/h (AD) or 173 km/h (SPA)
- Landing speed: 75 km/h
- Climb speed: 4.74 m/s Ceiling: 6100 m
- Flight duration: 3 hours
See also
editReferences
edit- ^ "samolotypolskie.pl - Bartel BM-3". www.samolotypolskie.pl. Retrieved 2024-06-30.
- ^ "samolotypolskie.pl - Bartel BM-3". www.samolotypolskie.pl. Retrieved 2024-06-30.
- ^ Glass, Andrzej (2004). Polskie konstrukcje lotnicze do 1939 r. Cz. 1. Sandomierz: "Stratus". ISBN 978-83-916327-8-9.
- ^ "samolotypolskie.pl - Bartel BM-3". www.samolotypolskie.pl. Retrieved 2024-06-30.
- ^ Glass, Andrzej (2004). Polskie konstrukcje lotnicze do 1939 r. Cz. 1. Sandomierz: "Stratus". ISBN 978-83-916327-8-9.
- ^ Morgała, Andrzej (2003). Samoloty wojskowe w Polsce: 1924-1939. Encyklopedia Broni i Uzbrojenia. Warszawa: "Bellona". ISBN 978-83-11-09319-5.
- ^ Morgała, Andrzej (2003). Samoloty wojskowe w Polsce: 1924-1939. Encyklopedia Broni i Uzbrojenia. Warszawa: "Bellona". ISBN 978-83-11-09319-5.
- ^ Morgała, Andrzej (2003). Samoloty wojskowe w Polsce: 1924-1939. Encyklopedia Broni i Uzbrojenia. Warszawa: "Bellona". ISBN 978-83-11-09319-5.