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Tandem-300 and Tandem-400
Tandem type parachute system allows two people (an instructor and a student/a passenger without parachute training) to make parachute jumps simultaneously. It can be also used for transporting specialists and cargoes to required places including hard-to-reach places, and as training system at the initial stages of training.
Tandem-330 and Tandem-400 by Ivanovo parachute works have some essential benefits compared with similar parachutes by other manufacturers:
1) new stabilizing chute, that has small canopy area and sufficient power of draught. It has minimal vibration at operation,
2) stabilizing system is comfortably attached to the container. Tandem-master is hanging under the stabilizing chute in small nose-up,
3) the pattern of main canopy compartment closing exclude early deployment of canopy,
4) the pattern of main canopy compartment closing doesn’t require any special width of rubber loops and exclude canopy exit before all the lines leave tof container,
5) the pattern of reserve canopy compartment closing is simplified and is similar to any other ordinary sport chute container,
6) main canopies of two possible sizes of 330 and 400 sq.ft. are easy to steer and stable in turbulence. The opening is accompanied by small dynamic overloads and stable in direction,
7) passenger harness allows to fix a passenger in any suitable for the tandem-master.
A complete assembly incorporates the following parts:
Main canopy 330 ft2 or 400 ft2
Reserve canopy 330 ft2 or 400 ft2
Harness/container system Irbis-Tandem
Student harness
Large pilot chute folding after the main canopy deployment
Spring pilot chute. Big cylindrical spring prevents the reserve canopy from aerodynamic shading during deployment.
Tandem-system has a 9-cell 37,2 sq.m elliptical main Riser canopy made of two types of nylon fabric: of F-111 type and zero-porosity fabric. It is manufactured with Microline 1000-1500 lines.
The system has a 9-cell rectangular 37,2 sq.m reserve Tandem Reserve canopy produced from nylon fabric with SVM lines (analog of Kevlar) and load-bearing frame.
The system is used with Cypres-2 AAD and “Transit” deployment scheme for direct reserve canopy deployment by break away handle.
Main and reserve canopies have the following performance characteristics:
- rate or descent up to 5 m/sec with an all-up weight of 225/205 kg.
- min. deployment altitude for the reserve canopy is up to 200 m, time of descent under
inflated canopy is not less than 10 sec
- deployment overloads:
- up to 4,1 g for the main canopy
- up to 5,2 g for the reserve canopy.