Slightly over 10 hours on the overhauled engine break-in. One mineral oil change. So far so good. Early on in test flying and in steeper left-hand turns, I noticed the foreward left flying wire vibrating. So I stopped doing steeper left-hand turns. I tested some higher speeds straight, climbing and descending with only the left, most forward flying wire showing vibrations.
Measured the tension with a Holloway Flying WIre Tensiometer. From the data obtained, and from the empirical "strumming" sound compared to other biplanes on the field, my sense is that they're all too loose. Here's the current data:
Left side
#1 F front flying wire 370 lbs.
#2 L front landing wire 475
#3 F middle flying wire 370
#4 L rear landing wire 475
#5 F rear flying wire 308
Right side
#1 F front flying wire 475 lbs.
#2 L front landing wire 370
#3 F middle flying wire 265
#4 L rear landing wire 515
#5 F rear flying wire 475
We're planning to "shoot" for the following ranges on the wires as we creep up on a balanced solution:
Flying wires all within the range 400-600 lbs, and as equal as possible.
Landing wires all within the range 600-800 lbs, and as equal as possible.
On each side, the sum of the 3x flying wires should approximately equal the sum of the 2x landing wires.
Open to comments and suggestions as I proceed. Thanks in advance.
Measured the tension with a Holloway Flying WIre Tensiometer. From the data obtained, and from the empirical "strumming" sound compared to other biplanes on the field, my sense is that they're all too loose. Here's the current data:
Left side
#1 F front flying wire 370 lbs.
#2 L front landing wire 475
#3 F middle flying wire 370
#4 L rear landing wire 475
#5 F rear flying wire 308
Right side
#1 F front flying wire 475 lbs.
#2 L front landing wire 370
#3 F middle flying wire 265
#4 L rear landing wire 515
#5 F rear flying wire 475
We're planning to "shoot" for the following ranges on the wires as we creep up on a balanced solution:
Flying wires all within the range 400-600 lbs, and as equal as possible.
Landing wires all within the range 600-800 lbs, and as equal as possible.
On each side, the sum of the 3x flying wires should approximately equal the sum of the 2x landing wires.
Open to comments and suggestions as I proceed. Thanks in advance.
