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I’m planning on flying in for the meeting. Any special considerations for parking? What’s the condition of the grass?
Hi All,
I’m sick and won’t be able to make it to the work party, but there is some work that needs to be done on the Krosno if anyone would like to pick up where I left off.
Before the holidays, the paint chips were removed, and body filler was applied to fill the voids.
The next step is to sand the filler flush to the paint and prep it for primer.
I will be back to do that next Saturday, but anyone looking for a job is welcome to take it in my absence!
Hmmm. I seem to recall a relatively steep bank angle during rope break practice. I’ll go with “D”
It seems worth considering that rate and radius of turn factor into the equation. In a shallow turn, your sink *rate* is lower, but distance travelled is longer as is time to complete the turn. In a steep turn, the opposite is true: Sink rate is up, distance travelled is smaller and duration of turn is shorter.
There’s a peak to this bell curve somewhere… 🙂
This is fun!
For #1, my vote is B. 16%.
My reasoning: In a 30% bank, load factor is 1.154Gs, or just about 16% more than the weight of the glider in level flight. As bank angle increases, the lift vector is shifted into the turn and away from direct opposition to gravity. Assuming a constant angle of attack through the turn, effective weight exceeds total lift by 16%, which would subsequently increase the sink *rate* by about 16%,
For #2, my vote is C. 7.5%.
My Reasoning: We know that stall speed increases proportionally to the square root of the load factor. As far as I can tell, this effect should be universal for ALL performance airspeeds (excluding structural limitations like Va, Vra, Vt, Vw, and Vne) Since we’re in a 30 degree bank, we know our load factor should be 1.16, and the square root of 1.16 is 1.077, or just about 7.5% increase over the reference airspeed in the POH.
So, in practice a glider with a minimum skink speed of 40kts at max gross should expect to use 43kts for a 30 degree banked turn.
How’d I do? 🙂
