1. THG Orbit
THG Orbit is a high school student project at Thorildsplans Gymnasieskola in Stockholm ( with purpose to construct a liquid fueled sounding rocket with capacity to initially reach 40 km altitude, but with a slightly modified
version reach 100 km.
Next launch attempt scheduled for students starting aug 2016, may 2017.
Only San Diego State University seem to have a similar project

2. THG Orbit One 1000 lb engine Pressure feed system No active guidance
Require launchtower
Technical well developed
Reusable (2-5 times)
Parachute return
Own construction
30-40 km altitude
Extended kerosene tank, max 100 km
Small payload area
Developed by students at THG
Remindes about Wac Corporal version B
Europes most advanced student rocket

3. THG Orbit Component development for may 2017 launch
New 4% diamond profile fins, epoxi/carbonfiber composite
New extended payload area, from 500 mm to 800 mm
Payload area cover made by carbon fiber, replaces heavy aluminia
Replace current heavy aluminia pressure tank with composite tank
Upgraded telemetry section, 5 watts 115 Kb/s transcievers, 433 Mhz
Upgraded onbord computer (Epia mini ITX, Arduino or Raspberry)
LOX remotely controlled dump valve
New 11 degree nosecone, carbone fiber replaces glasfiber

4. THG Orbit Preliminary technical data, may 2017 launch
Empty weight 110 lb (50 kg)
Thrust 1000 lb (450 kg)
Specific Impuls 200 sec
Mixture ratio 1.8
Payload weight, 22 lb (10 kg)
Propellant weight, 8 second duration, approx 40 lb (18 kg)
Air weight (300 bar, 9 liter) 6,5 lb (3 kg)
Total weight, including propellants and payload, approx 190 lb (85 kg)
Length 5800 mm
Diameter 200/250 mm
Propellant consumption, approx 1000/200=5 lb/sec (2,3 kg/sec)

5. THG Orbit School exhibition at Älvsjö Launch attempt dec 2005
(old system)

6. THG Orbit
Contact
Anders Holmqvist