Attention
This all new INTERMEDIATE II jet pipe has been developed to allow the use of 70-130 N engines in models, where space is limited. It fills the intermediate zone between our 40-80 N and 80-160 N jet pipes. Powerful turbines above 80 N are too strong for the smaller size 40-80 N jet pipes, but the next larger pipe size (80-160N) is unnecessary big and heavy. The new "INTERMEDIATE II" fits this gap and guarantees maximum static thrust at lower weight, when operating 80-130N engines. To make use of this effect, the total length of this pipe is limited to 800 mm.

Our jet pipes are double walled and made from the highest standard materials,being light and strong.We deliver each pipe with fixing materials for an easy and fast installation.
The lengths in the shop are total lengths of the pipe. As the turbine reaches inside the aluminium inlet of the pipe, the length of your pipe needs to be calculated as follows:

For 15-30N pipes
Measure from turbine exhaust cone to the end of the plane`s nozzle PLUS 20 mm

For 35-60N INTERMEDIATE pipes

Measure from turbine exhaust cone to the end of plane`s nozzle PLUS 30 mm

For 40-80N pipes
Measure from turbine exhaust cone to the end of the plane`s nozzle PLUS 40 mm

For 70-130N INTERMEDIATE II pipes

Measure from turbine exhaust cone to the end of plane`s nozzle PLUS 35 mm

For 80-160N pipes
Measure from turbine exhaust cone to the end of the plane`s nozzle PLUS 45 mm
For 160-250N pipes
Measure from turbine exhaust cone to the end of the plane`s nozzle PLUS 45 mm

Example: you have a 85 N turbine and measure a distance of 600 mm from your turbine exhaust cone to the end of the plane, you add 35 mm and will have to order a pipe with a length of 635 mm.
Download installation guide for your Grumania pipe below the chart

                    You need help ? Call us !   0049 7123 380988

 Please note, that jet pipes are tailor made itmes and not stocked.Double check what you order- we do not accept returns.