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Originally Posted by DeltaRomeo
Kahuna's dead on. All points.
I've talked to Ken Krueger many times about the differences between the -3 and the -4 and it is his experience that a -4 flown solo with the same powerplant/prop is more manueverable than a -3 ......due primarily to its different airfoil and different wing loading.
If I build again someday (and I probably will) it will be a -4. Fastback. Super simple/light - compass from Wal Mart on dash. Manual everything. Day VFR fighter. Cheap as possible so I can maybe keep the -6 for travelling.
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Like Mel, everyone I've talked to who has flown them
all say the -3 is best overall, and by a fair margin. Kahuna, maybe the ailerons on the -3 you flew were oversqueezed? That will have a surprising effect as Checkoway mentioned earlier in this thread.
On that point, a local guy recently flew his -3B after having sold his -8A. He reported that it felt heavy in the ailerons by comparison but that he had squeezed both ailerons chasing a wing heavy. I talked to him a week later and he said he fattened both ailerons up and it became way lighter in aileron feel. Just goes to show you how sensitive they are. My ailerons are QB and look a bit fat so I intend to leave 'em that way.
I feel kind of stupid at this point, I've spent relatively big $ and three years building what I consider the ultimate -3 yet have never flown one. I guess I'll find out within a few weeks though for better or for worse, that is if I ever get my prop back!
BTW Doug, the airfoil is the same on the -3 and -4 but the -4 is 13.5% thick whereas the -3 is 12% thick, further info
here. Indeed wing loading would be less on the -4 when flown solo... 90 sq.ft on the -3, 110 sq.ft on the -4, but then again a -3 will typically be around 200-225 lbs lighter. Hmm, guess we'll just need to do some dogfighting and find out... ;-)
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