Weight : 31.5t
Length : 6.35m
Width : 2.50m
Height : 2.79m
Crew : 4-5 men
Maximum armor : 60mm (APX4 turret in cast and hull is RHA bolted armor)
Maximum speed : 28 km/h (Renault engine, 6 cylinders, water cooled, gasoline, 307 hp, 16500 cm3, 1900 rpm,
2 Zenith type 70 AR 172 carburettors, 2 SEV G6 type 160 magnetos)
Transmission : 5 forward, 1 reverse
Autonomy : 160 km
Ground pressure : 0.85 kg/cm² (compared to 0.73 for PzIIc, 0.92 for a Pz III e/f and 0.83 for PzIV d)

1st gear - speed : 2.1 km/h (at 1600 rpm)
2nd gear - speed : 6.9 km/h (at 1600 rpm)
3rd gear - speed : 9.6 km/h (at 1600 rpm)
4th gear  - speed : 17 km/h (at 1800 rpm)
5th gear - speed : 28 km/h (at 1800 rpm)

Usual top speed :
25 km/h onroad
21 km/h easy offroad
15 km/h hard offroad

Big obstacles are negotiated at slow speed but between obstacles the tank has to run at normal speed to avoid loosing time.
For that purpose there is the FIEUX circuit breaker system that allows going directly to 4th gear (from the 1st one for example) without having to change gradually all the gears and to accelerate much more rapidly.

Notes about the APX4 turret (September 1939) :
Weight : 2570 kg with the complete armament
Ring : 1.022m

1) HAND ROTATION OF THE TURRET (360°) :
If angle of the turret is 0° :
55s if operator is standing (which is always the case in combat in this narrow turret)
60s if operator is sitting
(1 wheel turn for a rotation of about 2.21°)

If angle of the turret is 25° (tank is not on flat ground)
64s if operator is standing (mostly the case in combat in this narrow turret)
102s if operator is sitting

2) ELECTRIC ROTATION OF THE TURRET (360°) :
10° / second = 36s for a complete rotation

3) COPULA ROTATION (360°) :
Always by hand : 12 s

Time to look all around with the 3 means of observation (binocular, episcope, Estienne slit) and to return to the weapons : 5s
Time to find a target in the gunsight that has been first spotted in the copula's episcope and inversely : 3s
All these values are from tests, not in combat situation.

Renault B1bis tank vision means
Hull :
2x L.710 sights for the 75mm SA35 gun (stereoscopic telemeter, each with 3.5x magnification, field of view 11.15° and range ladders, adjustable drum up to 1600m).
1x adjustable slit with PPL RX 160 episcope (E2B episcope on the B1)
2x lateral slits
1x periscope (about 180° horizontal field of view)

APX4 turret (56mm armor, 2570 kg) :
1x sight for the 47mm SA35 gun (4x L.762 sight, + reticle, field of view 11.82°)
2x PPL RX 160 episcopes (68° horizontal field of view and +3° to -21° = 24° vertical field of view)

Cupola :
1x periscopic binocular (4x magnification, 8.91° field of view)
1x PPL RX 160 episcope (68° horizontal field of view and +2° to -22° = 24° vertical field of view)
1x Estienne slit (114° field of view – 120mm x 10mm slit protected by a 24mm thick armored shutter)

Detailed armor thickness (mm) :
Turret Front : 56mm/0° + gun and CMG mantlet (56mm)/round covering about 50% of the front surface
Turret Sides : 56mm/22.5°
Turret Rear : 56mm/22.5° (rear hatch is 56mm thick)
Turret Top : 30mm/74° and 90°
Copula : 48mm/25° and 90° (round)
Hull Front, Upper : 60mm/20°
Hull Front, Lower : 60mm/45°
Hull Sides, Upper : 55mm/20°
Hull Sides, Lower : 55mm/0°
Hull Rear : 55mm/43° and 0°
Hull Top : 14-27mm, mostly 25mm/90°
Hull Bottom : 20mm/90°
Ground pressure : 0.85 kg/cm² (compared to 0.73 for PzIIc, 0.92 for a Pz III e/f and 0.83 for PzIV d)

Armament:
one 47mm SA35 L/32 gun (72 shells - maybe 52 APC and 20 HE or 42 APC and 30 HE - traverse 360° and elevation -18 to +18°)
one coaxial 7.5mm MAC1931 in the turret (traverse 10° left and right and elevation -18 to +18°)
one 75mm SA35 L/17 gun (74 shells - 7 APHE, 67 HE - traverse 1° left and right and elevation -15 to +25°)
one fixed 7.5mm MAC1931 MG in the hull (35x150 rounds MAC31 drum magazines, for a total of 5250 cartridges for the 2 MGs).

47mm SA35 L/32 - in German service : 4.7cm KwK 173(f)

Practical AT range : 800-1000m

Ammunition :

Obus de rupture Mle1935 (APC) - in German service : Pzgr 176(f)
Caliber : 47x193R mm
Weight of projectile : 1.620 kg (sometimes 1.625 kg is indicated)
Length of projectile : 145mm (length of the case : 193mm and total length of the shell : 325mm)
V° = 660 m/s (sometimes 680 m/s is indicated)
Penetration : 40mm/30° at 400m


Obus explosif Mle1932 (HE) - in German service: Sprgr 175(f)
Caliber : 47x193R mm
Weight of projectile : 1.410 kg (142g explosive)
Length of projectile : 183mm
V° = 590 m/s

75mm SA35 L/17.1 - in German service : 7.5cm KwK 251(f)