Galleries

Utah Skiing with Jeff :

Utah Skiing with Jeff

Updated: Aug 18, 2008 2:56pm PST

Buenos Aires 2008 :

Buenos Aires 2008

Updated: Aug 18, 2008 2:51pm PST

Zanes Birthday :

Zanes Birthday

Updated: Aug 18, 2008 2:33pm PST

VJGC Pics - by David Privette July 13-17

Updated: Aug 12, 2008 4:28am PST

Maui - The rest :

Maui - The rest

Updated: Jul 25, 2008 4:19am PST

maserati :

maserati

Updated: Jul 24, 2008 3:51pm PST

SmugShots :

SmugShots

Updated: Jul 21, 2008 8:09am PST

Fontana and Brandy's 1st Airplane Ride :

Fontana and Brandy's 1st Airplane Ride

Updated: Jul 19, 2008 2:59pm PST

Victory Junction Gang Camp June 22-26

Updated: Jun 27, 2008 2:57pm PST

Staudacher Gear Issue : Staudacher gear failure. Operated off grass strip approximately 30 flights before failure. During most take offs and landings, the gear would 'shimmy' or vibrate fairly severely. On landing, it appeared that the vibrations would begin during brake application. Observed skid marks on the grass revealed that the gear would hop from one side to the other, locking brakes from side to side. (see diagram). 
My theory is that there are 2 factors that caused this. (a theory from a non-engineering or physics educated individual). First, the spring gear on this airplane has an extremely wide wheel base. This staudacher had about 90" between tire centers. To give some perspective, a Pitts S1S has about 52" and a much larger Waco Taperwing has 82". Both airplanes have rigid gear. Torque is a product of Force X Distance. The added force of the extended gear adds stresses that are exponential as the wheelbase grows. The second theoretical factor is resonance in the spring gear. I believe that this gear develops a vibration that resonates until all forces inputted are eliminated or reduced significantly: Liftoff or a speed slow enough on landing that reduces the forces enough to stop vibration. The gear appeared to have been vibrating and flexing rearward, creating a rotational moment on the gear legs that rotated the leading edge of the gear in a downward direction at the bracket, shearing the bolt and nut. 

http://cnx.org/content/m13544/latest/  

http://en.wikipedia.org/wiki/Torque

I believe that the spring gear on this airplane is too wide. 

Just a theory.

Mike

Staudacher Gear Issue

Staudacher gear failure. Operated off grass strip approximately 30 fli ...

Updated: Mar 23, 2008 4:48pm PST

Birthday 2-2-08 :

Birthday 2-2-08

Updated: Feb 03, 2008 11:21pm PST

Atlanta Aquarium :

Atlanta Aquarium

Updated: Dec 07, 2007 1:11am PST

Maui Fishing - 1026 lb marlin : Pictures of the 1026 lb marlin Jim and I caught in Maui

Maui Fishing - 1026 lb marlin

Pictures of the 1026 lb marlin Jim and I caught in Maui

Updated: Jul 19, 2007 12:40pm PST

Maui Day 1 :

Maui Day 1

Updated: Jul 14, 2007 12:54pm PST

St Maarten March 2007 :

St Maarten March 2007

Updated: Apr 21, 2007 4:50am PST

Waco Taperwing :

Waco Taperwing

Updated: Mar 25, 2007 9:04pm PST

Wine and Wig 2007 :

Wine and Wig 2007

Updated: Mar 25, 2007 9:03pm PST

NASCAR Atlanta Bass Pro Shops 500 - 2006 :

NASCAR Atlanta Bass Pro Shops 500 - 2006

Updated: Feb 14, 2007 12:42pm PST

NASCAR ATL 2006 Skydive Demos :

NASCAR ATL 2006 Skydive Demos

Updated: Oct 30, 2006 6:14pm PST

Limo :

Limo

Updated: Oct 09, 2006 1:07pm PST

Biz Jet Pictures :

Biz Jet Pictures

Updated: Sep 23, 2006 4:21pm PST

Maui 2004 - Tom Butt's last flight :

Maui 2004 - Tom Butt's last flight

Updated: Sep 16, 2006 5:02pm PST

Kauai 2004 :

Kauai 2004

Updated: Sep 15, 2006 3:05pm PST

Jeff and Zane :

Jeff and Zane

Updated: Sep 15, 2006 2:12pm PST

Jeff's Pitts S1S :

Jeff's Pitts S1S

Updated: Sep 15, 2006 1:23pm PST

Elle :

Elle

Updated: Sep 15, 2006 1:19pm PST

Baron Pics : Pics of Colemill Baron 55

Baron Pics

Pics of Colemill Baron 55

Updated: Sep 15, 2006 7:42am PST