John Uptigrove has Passed

Jazzenjohn

Gold Supporter
Joined
Oct 9, 2004
Messages
2,708
Location
Milan Mich.
Aircraft
Gyrobee, My design
Total Flight Time
350
Very Sad, He was an inspired designer. The ultralight Mosquito was a brilliant piece of work!
 

bryancobb

Junior Member
Joined
Aug 2, 2010
Messages
4,979
Location
Cartersville, GA
Aircraft
Owned Brantly B-2b/Fly Kitfox III/Mini-500b
Total Flight Time
1350
John was the son of two missionaries in India. He was a dedicated Christian and had no problems saying so. He died doing what he loved. I pray that unending peace be with his wife and two kids in this tough time.
 

Attachments

All_In

Gold Supporter
Joined
Apr 21, 2008
Messages
14,624
Location
San Diego, CA. USA
Aircraft
Piper Archer, Aviomania G1sb
Total Flight Time
Not sure over 10,000+ logged FW, 260+ ultralights, sailplane, hang-gliders
So sad. Was it from the accident?
I wish to extend my deepest condolences to the Uptigrove family.
 

bryancobb

Junior Member
Joined
Aug 2, 2010
Messages
4,979
Location
Cartersville, GA
Aircraft
Owned Brantly B-2b/Fly Kitfox III/Mini-500b
Total Flight Time
1350
It is eerily similar ...the appearance of the crash site...to where BJ lost his life in the Helicycle.
 

C. Beaty

Gold Supporter
Joined
Apr 16, 2004
Messages
9,656
Location
Florida
I met John Uptigrove a number of years ago when I received a telephone call from him wanting to know why the rotor of a helicopter he was building flopped over to one side when he tried to run it up. He explained that he had copied the rotorhead of an early Rotorway.
The Rotorway used a variant of the Bell-47 rotor system wherein the rotor hub is mounted on a universal joint and cyclic pitch is forced to occur about a pair of pivots of the “U” joint.
I asked John if he’d omitted the link that locks the feathering bearings together. Turned out that he had.
John Uptigrove was one of the very few people in the hobycopter business who was a real rather than make believe engineer but everyone has a learning curve.
the attachment is a diagrammatic drawing of the Bell-47 cyclic system.

Bell-47.jpg
 
Top