Uploaded March 2021 | Updated September 2026, 6 days ago
We have an old, crusty Allison 250 C-18 turboshaft engine, originally used in a Bell Jet Ranger helicopter.
We need to clean it up and get it into running shape, so it can put its 317 Hp into the jet water jet drive of a very small speed boat.
Let's take a quick look at the engine and what needs to be done.
The specs for the C18 are listed on the Wiki page here: en.wikipedia.org/wiki/Allison_Model_250
Although the pictures are of the C20, which is very similar.
To see a Bell Jet Ranger being used as an aerial tow truck, have a look at my video about racing on the Dart River in NZ. Heli footage starts at about 15:00.
youtu.be/VfnvtDuJgGA
We have an old, crusty Allison 250 C-18 turboshaft engine, originally used in a Bell Jet Ranger helicopter.
We need to clean it up and get it into running shape, so it can put its 317 Hp into the jet water jet drive of a very small speed boat.
Let's take a quick look at the engine and what needs to be done.
The specs for the C18 are listed on the Wiki page here: en.wikipedia.org/wiki/Allison_Model_250
Although the pictures are of the C20, which is very similar.
To see a Bell Jet Ranger being used as an aerial tow truck, have a look at my video about racing on the Dart River in NZ. Heli footage starts at about 15:00.
youtu.be/VfnvtDuJgGA
