[NSRCA-discussion] F3A: F21 observations

[Derek Koopowitz]

Jim,

With regard to the golf ball - please look over the PowerPoint presentation on the Nsrca web site for different views of what an appropriate golf ball may look like - page 7.  And yes the entry/exit radii must match the top - page 6. 

Best,
Derek

Sent from my iPhone

> On Nov 25, 2019, at 10:50 AM, james woodward via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
> 
> 
> Some F21 Manuever Discussion:
> 
> 1. Golfball - does the entry/exit radii need to match the top?   The maneuver seems to get HUGE.  I'm thinking I need to tighten the initial segment of the top loop.  And then tighten the last segment, to preserve the second 45 down line.  Hit 45, and not be "flat", else the top loop gets even bigger.
> 2. 1/2 Cuban 8, 2/4 pt, 1/4 Roll, Knife edge 5/8 Loop:  EXCELLENT maneuver for airplane trimming :)  Roll & pitch mix to Rudder viewed every flight haha.  With the Invitation, Left Rudder zero/zero, Right rudder bout 5% down elevator, 1.5% Left Aileron :) 
> 3.  Roller - 1/2 in, 1/2 out - also excellent rudder trim maneuver.  
> 4.  Top Hat - good maneuver after the roller
> 5.  Funky Humpty (center cross);  Attempting to "fix" the spline after the 1/4 loop integrated just makes it worse.  Must "ping" this upline and just power through into the roll.  Downline - yikes - If you go "out", and looking at the "Bottom" of the plane - Lead with the Rudder that points the direction you want to go, then aileron/elevator.  Wrong Rudder at this point with freeze your brain!@! haha
> 6.  3/4 8 with 1/2 roll - not too bad - no reason to go too tall
> 7.  Funky Hammer (Center with looping sections):  Not too bad, but difficult to get the "downline" on center for sure.  
> 8.  Figure 9 with 1.5 snap:  not too bad.  Fly at the end of the box to give room for center top-hat
> 9.  Top-Hat:  Pretty cool maneuver!  If in doubt, begin early, but the "exit" determines the next maneuver.
> 10.  1/2 Square loop, 1/2 roll entry:  Must hit the previous "exit" perfectly, then 1/2 Roll entry into 1/2 sure.  1/2 roll entry is a kind of a refreshing take on this maneuver.  
> 11.  45 down line:  1/4 roll, snap, opposite snap, 1/4 roll.  I haven't nailed this yet, but so far, Positive first, Negative second, seems to help hold the 45 line.  
> 12.  1/2 8 sided with 1/2 rolls 1xt,3rd legs.  Not too bad.  Also, try not to get too tall.
> 13.  Loop with opposite integrated rolls:  cool maneuver - seems to go best when not trying to make too big or over control.  Error on the "power power" for heading up the backside, makes coordinating the aileron/rudder easier.  
> 14.  Positive 2.5 turn spin - nice given P21 has a 2.5 negative spin. 
> 15.  Roll Combo:  Nice manuever - but "exit" into the  Fighter Turn...
> 16.  Fighter Turn:  3/4 Roll, 3/4 Snap to Upright.  For some reason, flying Left to Right, I hit this OK.  Flying right to Left, its been a visual disaster for me.  This is my worst maneuver so far.  I'll need to specifically practice this one.  
> 17.  Horizontal Square:  1/4 Roll, 1/2 rolls out, 1/4 roll.  So far, looks worse on paper than it is.  Of course, its beneficial  to be a tad higher baseline to fly this.  When pushing the corners, almost no rudder is needed to maintain height.  This is a rudder brain teaser, as you are constantly in/out of rudder same direction while pushing corners, then rolling, then in/out other direction during corner pushes.  
> 
> Anyone else have some comments yet on F21?
> Jim 
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