On Wednesday, October 23, 2019 at 9:02:30 AM UTC-6, wrote:
On Tuesday, October 22, 2019 at 7:26:06 PM UTC-5, Mike N. wrote:
How do you manage turbine cool down requirements prior to retraction?

What is the fuel consumption rate for both take off power and cruise?

What is the service life of the turbines?

This is cool, I am asking because I find this very interesting.

Turbine cool down - All of the turbine engine data is monitored in the cockpit including the temperatures. After shutdown they stay extended until I see the temps drop to below 30C, then they are retracted. This will take about a minute.

The fuel consumption is really high. During takeoff I will burn a gallon every two minutes. An average 3k climb will burn just under 3 gallons. My cruise configuration will be using one turbine for sustainer at full power using 1 gallon every 4 minutes. One engine gives me a 300 fpm climb rate if needed or a fast cruise.

The service life is 25 hours. At that interval the manufacture will inspect and rebuild the engines to bring them back to new overhaul condition. The turbines are RC engines primarily intended for large RC aircraft. The engines are Jetcat P300 RX which have been replaced with the latest P300 Pro versions.

Very interesting. Thanks for posting this. 25hr service life seems really low. But I'm not familiar with jet engines that much, so I speak out of ignorance.