Alex Strojnik inspects Mike Arnold's AR-5

Homebuilt Aircraft & Kit Plane Forum

Help Support Homebuilt Aircraft & Kit Plane Forum:

sming

Well-Known Member
Joined
Apr 10, 2019
Messages
192
That's amazing, thank you!
Thank you for not editing it as well, very much appreciate the "fly on the wall" effect 30 years later.
To airplanes nuts!:beer:
 

Max Volume

Active Member
Joined
Sep 16, 2021
Messages
33
Location
Vallejo California USA
some of the Movies on deck being edited are when Mike took me to Edwards Air Force Base when he worked for N.A.S.A. at their Dryden facility and when we visited Dennis Sanders and Drednaught at their home base...
 

plncraze

Well-Known Member
HBA Supporter
Joined
May 11, 2006
Messages
2,115
Very nice! Listening to Mike and Alex talk is very amusing. Especially the last 5 minutes.
 

Vigilant1

Well-Known Member
Lifetime Supporter
Joined
Jan 24, 2011
Messages
6,833
Location
US
View attachment 115754Alex Strojnik inspects Mike Arnold's AR-5
hot off the presses after a marathon editing session - didn't want to load here for some reason - good night it's 4:37 am!

https://youtu.be/zcDEPt6WXi0
Interesting when (at about 10:00) Strojnik and Arnold discuss the wing's airfoil and smoothness. Strojnik ("Mr Laminar") and Mike appear to agree that, for low drag, the smoothness of the finished wing is as/more important than the airfoil chosen. Strojnik: "It is the quality of the wing that counts, not the airfoil."

Thanks for the video!
 

wsimpso1

Super Moderator
Staff member
Log Member
Joined
Oct 18, 2003
Messages
8,346
Location
Saline Michigan
Moderator Mode On:

I just combined the posts with these videos into one thread. Folks, spreading related videos around the forum makes it hard for folks to find them and see them in sequence. Please put series of videos together on one thread, and in order too.

Moderator Mode Off
 
Last edited:

Lendo

Well-Known Member
Joined
Feb 6, 2013
Messages
817
Location
Brisbane
Interesting Arnold didn't understand the the comment of Pitch over Diameter (P./D.) reference as it's an important indicator of efficiency. I believe the optimum is 1.3 +, but I think Axel suggested the number 1. but I didn't quite pick it up, perhaps he might have meant a minimum of 1.
George
 

Vigilant1

Well-Known Member
Lifetime Supporter
Joined
Jan 24, 2011
Messages
6,833
Location
US
I'm with Mike, then. I hadn't heard of pitch/diameter ratio as an indicator of efficiency. Seems a lot would depend on the airspeed of interest and the RPM vs power curve of the chosen engine/PSRU.
 

davidjgall

Well-Known Member
Joined
Oct 7, 2010
Messages
131
Location
Northern California, USA
I'm with Mike, then. I hadn't heard of pitch/diameter ratio as an indicator of efficiency. Seems a lot would depend on the airspeed of interest and the RPM vs power curve of the chosen engine/PSRU.
It is a reference to propeller efficiency so the power curve of the engine does not play into it. (That would be propulsive efficiency, not propeller efficiency.)
 

davidjgall

Well-Known Member
Joined
Oct 7, 2010
Messages
131
Location
Northern California, USA
Some of the links above do not work correctly. The links to the individual videos are here:

Mike Arnold's AR-5 Up Close

Alex Strojnik and the AR-5 pt1 - warning! - airplane nuts only!

Alex Strojnik and the AR-5 pt2 - warning! - airplane nuts only!

Alex Strojnik and the AR-5 pt3 - warning! - airplane nuts only!

Alex Strojnik and the AR-5 pt4 - warning! - airplane nuts only!

Mike Arnold Composite Fabrication Seminar Clip

Link to the playlist:
 
Top