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1. 12:00 PM - Re: 74 inch verse 72 inch ()
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| Subject: | Re: 74 inch verse 72 inch |
72" WILL give higher top speed, so if you like flying at full power and
RPM than this is the clear winner.
74" WILL give slightly better climb (low speed).
That is a fact. Now how much? A mph or two or three, a few dozen fpm.
Yes the service limit may be 72" but if WACK you prop, 72 or 74 it will
likely be damaged beyond repair.
Nose gear planes can easily strike prop, you are not immune; it takes
an uneven surface and/or gear deflection and/or botched landing, whack,
whack, whack.
My suggestion is for the average flyer get the 74". You can always cut it
down later if you want to race it at full RPM. Prop Dia makes a diff but a
small one. Since most don't run around at 2,600-2,700 RPM the larger
dia will be fine.
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