| General Information | |
|---|---|
| Type | I-3 (SP-91) |
| Function | Trainer, Aerobatic |
| Year | ? |
| Crew | 1 or 2 |
| Powerplant | |
| Type | M-14P (Lycoming O540) |
| Power at ?m | 360hp (260hp) |
| Size | |
| Length | 6.77m |
| Height (parked) | 2.2m |
| Wingspan | 8.1m |
| Wing area | 11.54m2 |
| Weights and loads | |
| Empty (one seat) | 749kg |
| Empty (two seats) | 769kg |
| Loaded (maximum) | 1063kg |
| Wing Load (kg/m2) | XX |
| Power load (kg/hp) | XX |
| Speed | |
| Maximum level | 350km/h |
| Maximum allowed | 450km/h |
| Maximum full control deflection | 450km/h |
| Stall (landing) | 105km/h |
| Inverted stall | 105km/h |
| Maneuverability | |
| Roll rate | 345°/sec |
| g-load (one seat) | +12/-10 |
| g-load (2 seats) | +11/-9 |
| Roll | |
| Landing | 452m |
| Takeoff | 200m |
| Range | |
| Ferry | 700km |
| Ceiling | |
| Ceiling | ?m |
| Climb | |
| at 0m | 19m/sec |
| Payload | |
| Fuel | ?kg |
| Other | |
| Price | under $100,000 |
I-3 (SP-91) aerobatic/trainer by Interavia
The E-3 is the export version of the SP-91, a multipurpose sport aerobatic and training aircraft capable of being changed between single and two seat configuration with minimal work. Conversion may be done less than in 1 hour in airfield conditions. It is designed to have exceptional aerobatic performance, tremendous strength (concept of maximum safe damage), and a long service life while also having a low landing speed, good cruise speed, and honest handling characteristics.
The aircraft is a single engine monoplane of all metal construction utilizing electro-chemical coating of the metal for superior corrosion prevention. Fixed landing gear - conventional taildragger. Cockpit is equipped for good weather daylight flights. The wing is of one piece design with a symmetrical profile airfoil and utilizes multi-longeron spar construction to prevent the possibility of catastrophic failure. The ailerons may be drooped for landing and takeoff.
This aircraft is powered by the M-14P engine. This engine is a single row air cooled supercharged radial with nine cylinders. The fuel and oil systems are adapted for both level and inverted flight.
The aircraft may be equipped with either the V-530 TA-D35 variable pitch two bladed propeller, the MT-3 and MT-9 three bladed propellers, or the Whirlwind three bladed propeller.
The aircraft may be configured for the following:
- High performance aerobatic flight and unlimited competition in the single seat configuration
- Aerobatic training and competition in the two seat configuration
- Cross country flight and tourism in either configuration
In many respects the E-3 is unique in aviation history. It is both a single seater and a two seater in one aircraft. It is easier to fly than a Decathalon, while being able to compete successfully at the unlimited level. In addition it cruises well and even has a baggage compartment! You can take your wife or husband for a holiday cruise and then go out and compete with the best the next weekend. It does it all and it is of all metal construction allowing for inspection and repair at any qualified service center. None of the uncertainties of composite construction are present.
Some confusion exists around airplane designation. It is known as:
- SP-91 - original domestic designation;
- I-3 or E-3 - different 'translations' of cyrillic designation, used for export version;
On August 2000, 19 aircraft were sold to Great Britain, Switzerland, USA, and Spain. (MDM Bank News)
| Predecessors | Modifications |
|---|---|
| ? | ? |
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| Created October 19, 2000 |  |
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