Technical data
Type	R-Z
Function	Reconnaissater Attacker
Year	1935
Crew	2
Engines	1*750/850hp M-34N
Length	9.7m
Wingspan	15.5/11.6m
Wing area	42.52m²
Empty weight	2007kg
Loaded weight	3150kg
Wing Load (kg/m²)	74.0
Power load (kg/hp)	4.2
Speed at 0m	276km/h
Speed at 3500m	316km/h
Landing Speed	105km/h
Landing Roll	14sec 220m
Takeoff Roll	15sec 270m
Turn time	18sec
Range	1000km
Ceiling	8700m
Climb
3000m	6.6min
5000m	11.8min
Armament
Guns	up to 7*7.62mm
Bombs	500kg

R-Z, Factory-1

53k b/w drawing of RZ on skis, courtesy of ;

Seriously redesigned version of R-5, intended for ground attack rather than for reconnaissance missions. It was created under initiative of A.M.Belenkovich (Director of Factory-1) by team of designers at this factory (E.P.Shekunov, D.S.Markov, A.A.Skrabov and others). R-Z was smaller than predecessor and had different powerplant. Other changes included enclosed cockpit, covered defensive turret (in same canopy). Construction was lighter than of the R-5 and somewhat weaker, but still fulfilled all requirements.

Modifications failed to add much of performance. Opposite, R-Z was much tougher in handling and put much more stress on pilot than its predecessor.

Drawing of RZ in Spanish colors (28k) from 'Krylia Rodini' March 1989

Early batches had same armament as R-5, later was strengthened. R-Z was widely used during Civil War in Spain.

In production during 1935- 1937, it was the last Soviet biplane reconnaissater built in series.

Predecessor	Modifications
R-5	R-Z attacker	R-Z record setter	R-Z cargo
R-5	P-Z passenger	PT-AM-34NB transport

More Links...

R-Z, Polikarpov
R-5 and R-Z

References:

"History of aircraft construction in the USSR", Vol.1 p.511-512;