| Technical data |
|---|
| Type |
I-4bis |
| Function |
Experimental fighter |
| Year |
1931 |
| Crew |
1 |
| Engines |
1*480hp M-22 |
| Length |
7.28m |
| Wingspan |
11.4m |
| Wing area |
19.8m2 |
| Empty weight |
973kg |
| Loaded weight |
1385kg |
| Wing Load (kg/m2) |
70 |
| Power load (kg/hp) |
2.88 |
| Speed at 0m |
268km/h |
| Turn time |
12sec |
| Flight Endurance |
2h18min |
| Ceiling |
7000m |
| Climb |
| 1000m |
14.0min |
| Payload |
|---|
| Fuel+Oil |
236+25kg |
| Armament |
|---|
| Guns |
2*mg7.62mm |
15k b/w photo from the
Virtual Aircraft Museum
Monoplane variant
of the I-4. Leading edge slats (half of the wing span) were
controlled by the pilot. Engine cowling was replaced by Townend ring with individual fairings
over cylinder heads.
I-4bis was rebuilt from series I-4 for research purposes and flown in
1931.
It was 10km/h faster than production aircraft, but suffered
some losses in maneuverability. Other parameters remained unchanged. Slats proved to be helpful, but manual operation required
too much attention from a pilot. It was found that slats should be made automatic... and the concept was abandoned until
1940.
| Predecessors | Modifications |
|---|
I-4
|
-
|
