Another E glider concept

https://www.youtube.com/watch?v=ZIYU2zkGQFQ

On Sunday, August 16, 2020 at 12:33:33 PM UTC-5, Jonathan St. Cloud wrote:
https://www.youtube.com/watch?v=ZIYU2zkGQFQ

Great cgi. What are the chines for, if the are for go fast, why don't mainstream gliders have them?

On Sunday, August 16, 2020 at 4:11:15 PM UTC-7, wrote:
On Sunday, August 16, 2020 at 12:33:33 PM UTC-5, Jonathan St. Cloud wrote:
https://www.youtube.com/watch?v=ZIYU2zkGQFQ

Great cgi. What are the chines for, if the are for go fast, why don't mainstream gliders have them?

If you mean the fins on either side of the nose clearly marked "sensor", likely angle of attack vanes. Not very useful when the motor is running...

Originally Posted by Jonathan St. Cloud

https://www.youtube.com/watch?v=ZIYU2zkGQFQ

Interesting concept although on first look got to wonder if he was dreaming of an updated, stretched and powered 2 seat Salto that could fly him to fame and fortune (just kidding about the fortune)

:-) Colin

If you mean the fins on either side of the nose clearly marked "sensor", likely angle of attack vanes. Not very useful when the motor is running...

Not thinking about the sensor fin.

at 0:25 in the video. The horizontal line mid screen a few inches below the canopy. Looks like a transition between a flatish underbelly and vertical cockpit upper side. Looks like the chines under a boat?

On Sunday, August 16, 2020 at 6:19:27 PM UTC-7, wrote:

If you mean the fins on either side of the nose clearly marked "sensor", likely angle of attack vanes. Not very useful when the motor is running...
Not thinking about the sensor fin.

at 0:25 in the video. The horizontal line mid screen a few inches below the canopy. Looks like a transition between a flatish underbelly and vertical cockpit upper side. Looks like the chines under a boat?

I wonder if they are also accepting deposits for this concept.

On Sunday, August 16, 2020 at 6:19:27 PM UTC-7, wrote:

If you mean the fins on either side of the nose clearly marked "sensor", likely angle of attack vanes. Not very useful when the motor is running...
Not thinking about the sensor fin.

at 0:25 in the video. The horizontal line mid screen a few inches below the canopy. Looks like a transition between a flatish underbelly and vertical cockpit upper side. Looks like the chines under a boat?
I see what you mean, the odd transition between the upper and lower fuselage profile that extends to the tail. Perhaps structural, or for style? I find it hard to believe it does much for the aerodynamics except produce a bit of drag.

wrote on 8/16/2020 6:19 PM:


If you mean the fins on either side of the nose clearly marked "sensor", likely angle of attack vanes. Not very useful when the motor is running...

Not thinking about the sensor fin.

at 0:25 in the video. The horizontal line mid screen a few inches below the canopy. Looks like a transition between a flatish underbelly and vertical cockpit upper side. Looks like the chines under a boat?

The lines extend along the tail boom, too. I can't think of any reason for them.

I do like the propeller concept. It allows 3 blades, giving it 50% more swept area
for the same diameter propeller as a two blade prop. That should enable them to
use a 50% more powerful motor than the two blade FES, or more ground clearance for
the same swept area. The reasons for the Vee tail are not obvious to me.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1

On Sunday, August 16, 2020 at 8:19:10 PM UTC-7, Eric Greenwell wrote:
wrote on 8/16/2020 6:19 PM:


If you mean the fins on either side of the nose clearly marked "sensor", likely angle of attack vanes. Not very useful when the motor is running...

Not thinking about the sensor fin.

at 0:25 in the video. The horizontal line mid screen a few inches below the canopy. Looks like a transition between a flatish underbelly and vertical cockpit upper side. Looks like the chines under a boat?

The lines extend along the tail boom, too. I can't think of any reason for them.

I do like the propeller concept. It allows 3 blades, giving it 50% more swept area
for the same diameter propeller as a two blade prop. That should enable them to
use a 50% more powerful motor than the two blade FES, or more ground clearance for
the same swept area. The reasons for the Vee tail are not obvious to me.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1

Concepts are really nice because you don't have to worry about any of those pesky engineering details.

On Sun, 16 Aug 2020 20:04:19 -0700, Marc Ramsey wrote:

On Sunday, August 16, 2020 at 6:19:27 PM UTC-7, wrote:

If you mean the fins on either side of the nose clearly marked
"sensor", likely angle of attack vanes. Not very useful when the
motor is running...
Not thinking about the sensor fin.

at 0:25 in the video. The horizontal line mid screen a few inches below
the canopy. Looks like a transition between a flatish underbelly and
vertical cockpit upper side. Looks like the chines under a boat?
I see what you mean, the odd transition between the upper and lower
fuselage profile that extends to the tail. Perhaps structural, or for
style? I find it hard to believe it does much for the aerodynamics
except produce a bit of drag.

Graphical artifact?

In the top view just from the right it looks as though it sticks out as
far as the sensor does and is blurred, while from the top left it only
seems to extend a cm or so and in other views it just looks like a
blurred line along the fuselage.


--
Martin | martin at
Gregorie | gregorie dot org