TH-dimer
TH-dimer, also called tetrahydromethylcyclopentadiene dimer[1] or RJ-4, is a liquid rocket propellant used in missiles and jet engines. For example, TH-dimer is used in the turbofan engine of the Tomahawk cruise missile. It is also a component of the jet fuel JP-9.
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| Names | |
|---|---|
| Other names
Tetrahydromethylcyclopentadiene dimer; Tetrahydrodimethyldicyclopentadiene; THDMDCP; RJ-4; RJ4 | |
| Identifiers | |
| Properties | |
| C12H20 | |
| Molar mass | 164.292 g·mol−1 |
| Density | 0.915 g/cm3 |
| Hazards | |
| Flash point | 60 °C (140 °F; 333 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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| Infobox references | |
The fuel is non-volatile so it is safe to use on ships or submarines. It has a high flash point minimum of 60 °C.[2]
Chemically, TH-dimer is a mixture of isomeric saturated hydrocarbons derived from hydrogenation of the dimer of methylcyclopentadiene.[3]
References
- Naval Submarine Base New London
- Modern US Military Turbine Missile Fuel Specifications
- US 4177217, Janoski, Edward J.; Mitchell, Richard E.; Schneider, Abraham, "Continuous conversion of dimethyldicyclopentadiene to endo-dimethyldicyclopentadiene, a missile fuel", issued 1979
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