ASW 27 Flight Testing Video Clip

On Wednesday, October 23, 2019 at 10:14:03 AM UTC-5, Joel Flamenbaum wrote:
Beautiful - fuel consumption and where is the fuel stored? Duration at full throttle?
Also, drag or loss in performance with turbo extended?

Awesome combination

A 10 gallon fuel cell is built into the fuselage behind all of the control systems. I have a slightly aft CG during takeoff and as I burn fuel my CG moves forward. Duration with full fuel would be 20 minutes at full power. If I get a tow and only run one turbine I can double the endurance. The extended turbines have a pretty small drag signature. I am guessing it is similar to leaving the gear down. The air noise is more noticeable then the drag during the extended cooling cycle.

Chris

Hi Chris,

Interesting modifications, congratulations to your achievement! Are the gelcoat-discolorations on the tail caused by the heat of the exhaust, or is this a result of fuel contamination? I remember that in some turbine powered gliders, the engines are slightly angled against the fuselage centerline in order to keep the heat away from the tail. If I am not mistaken, this was the case with the LS4 jet retrofit offered by M&D (https://md-flugzeugbau.de/en/areas-o...rieb-mdtj-42/).

Christoph

On Wednesday, October 23, 2019 at 12:38:32 PM UTC-5, wrote:
Hi Chris,

Interesting modifications, congratulations to your achievement! Are the gelcoat-discolorations on the tail caused by the heat of the exhaust, or is this a result of fuel contamination? I remember that in some turbine powered gliders, the engines are slightly angled against the fuselage centerline in order to keep the heat away from the tail. If I am not mistaken, this was the case with the LS4 jet retrofit offered by M&D (https://md-flugzeugbau..de/en/areas-...rieb-mdtj-42/).

Christoph

The discoloration is a build up from a number of takeoffs and heat is not a problem. The diesel fuel is mixed with turbine oil for bearing lubrication which soils the tail. A wax/grease remover is needed for removal.

At 21:58 22 October 2019, wrote:
For the last month I have been flight testing the rebuilt ASW 27. The
progr=
am is going well and I am nearing completion of the required phase 1
testin=
g. I still have max gross weight, final spin testing and a tow test for
com=
pletion. So far I have only been able to self-launch since no towing is
ava=
ilable this late in the season. The twin turbines are working well and
prov=
ide a solid 600 fpm climb rate at these cooler fall temperatures. The
steer=
able tailwheel is also working well and provided good directional control
d=
uring takeoff and landing.=20

Here is a link to a compilation of short clips from the flight test
program=
..=20

https://www.youtube.com/watch?v=3DS_rFhN_abrQ

Chris

Damn, the video link no longer works. Any chance of a new link, please?

On Tuesday, October 22, 2019 at 4:58:19 PM UTC-5, 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
https://www.youtube.com/watch?v=S_rFhN_abrQ

At 13:46 24 October 2019, wrote:
On Tuesday, October 22, 2019 at 4:58:19 PM UTC-5,
wrote:
For the last month I have been flight testing the rebuilt ASW 27. The
pro=
gram is going well and I am nearing completion of the required phase 1
test=
ing. I still have max gross weight, final spin testing and a tow test for
c=
ompletion. So far I have only been able to self-launch since no towing is
a=
vailable this late in the season. The twin turbines are working well and
pr=
ovide a solid 600 fpm climb rate at these cooler fall temperatures. The
ste=
erable tailwheel is also working well and provided good directional
control=
during takeoff and landing.=20
=20
Here is a link to a compilation of short clips from the flight test
progr=
am.=20
=20
https://www.youtube.com/watch?v=3DS_rFhN_abrQ
=20
Chris
https://www.youtube.com/watch?v=3DS_rFhN_abrQ

Says "video unavailable".

At 14:36 24 October 2019, Never Again 2 wrote:
At 13:46 24 October 2019, wrote:
On Tuesday, October 22, 2019 at 4:58:19 PM UTC-5,
wrote:
For the last month I have been flight testing the rebuilt ASW 27. The
pro=
gram is going well and I am nearing completion of the required phase 1
test=
ing. I still have max gross weight, final spin testing and a tow test
for
c=
ompletion. So far I have only been able to self-launch since no towing
is
a=
vailable this late in the season. The twin turbines are working well and
pr=
ovide a solid 600 fpm climb rate at these cooler fall temperatures. The
ste=
erable tailwheel is also working well and provided good directional
control=
during takeoff and landing.=20
=20
Here is a link to a compilation of short clips from the flight test
progr=
am.=20
=20
https://www.youtube.com/watch?v=3DS_rFhN_abrQ
=20
Chris
https://www.youtube.com/watch?v=3DS_rFhN_abrQ

Says "video unavailable".


gliderpilot.net mangles urls. Take out the "3D", should be
"v=S_rFhN_abrQ".

gliderpilot.net mangles urls. Take out the "3D", should b
"v=S_rFhN_abrQ".

That worked, thank you.

Chris, maybe a link to your youtube channel instead?

Nice video. Welcome to the jet club. BTW, your canopy needs cleaning. Also, Bob Carlton and I have found that Windex easily removes the residue from jet exhaust on the tail. Use REAL Windex. Some of the off-brand blue glass cleaners won't do it.