ASW 27 Flight Testing Video Clip

For the last month I have been flight testing the rebuilt ASW 27. The program is going well and I am nearing completion of the required phase 1 testing. I still have max gross weight, final spin testing and a tow test for completion. So far I have only been able to self-launch since no towing is available this late in the season. The twin turbines are working well and provide a solid 600 fpm climb rate at these cooler fall temperatures. The steerable tailwheel is also working well and provided good directional control during takeoff and landing.

Here is a link to a compilation of short clips from the flight test program..

https://www.youtube.com/watch?v=S_rFhN_abrQ

Chris

On Tuesday, October 22, 2019 at 5:58:19 PM UTC-4, wrote:
For the last month I have been flight testing the rebuilt ASW 27. The program is going well and I am nearing completion of the required phase 1 testing. I still have max gross weight, final spin testing and a tow test for completion. So far I have only been able to self-launch since no towing is available this late in the season. The twin turbines are working well and provide a solid 600 fpm climb rate at these cooler fall temperatures. The steerable tailwheel is also working well and provided good directional control during takeoff and landing.

Here is a link to a compilation of short clips from the flight test program.

https://www.youtube.com/watch?v=S_rFhN_abrQ

Chris

Very cool!
UH

On Tuesday, October 22, 2019 at 5:48:43 PM UTC-5, wrote:

Very cool!
UH

Yes indeed! Thank you for the update, Chris!

Steve Leonard

Very cool! Is that retract system electric or manual? Can you start the turbines in the air?

On Tuesday, October 22, 2019 at 6:53:05 PM UTC-5, Charles Longley wrote:
Very cool! Is that retract system electric or manual? Can you start the turbines in the air?

Retract system is electric using linear actuators.

One or both turbines can be started in the air for sustainer or another climb.

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.

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.

Nice. I am familiar with RC jet engines and the Jet Cat engines.

Thanks for the video and innovation. Continued good luck on your project.

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.

Beautiful - fuel consumption and where is the fuel stored? Duration at full throttle?
Also, drag or loss in performance with turbo extended?

Awesome combination