I don't know of anyone that have
reached 2,000 hours on the same engine and re-drive.
Most rotor heads love to tinker. Tracy Crook, probably one of
those with most hours, upgraded to a re-drive of his own design
from the Ross drive. First to a 2.17:1, then 2.85:1. He also
changed from a junk yard 13B to a Renesis. Looking at the wear of
the 13B, it could easily have reached 2,000 hours.
The 13B/Renesis making 180 HP should have no problem reaching
2,000 hours,
provided it's properly cooled.
This appears contrary to David Leonard's experience, so he'll have
to chime in regrading his reasons for overhaul (what kind of
wear?). Note that his is turbocharged.
Tracy would typically cruise on 75 HP -- 160 mph -- in his RV-4,
so maybe his data may not be typical. But that would be 160 x
2,000 = 320,000 miles.
Considering the low cost to overhaul a 13B, even 1,000 hours would
be acceptable to me.
I only have 850 hours in two 13B powered RV-3s. 575 hours in the
first. The rest in my current RV-3B which has 500 hours on it.
Finn
On 9/2/2019 11:00 AM, Kent Bedford
kbedford@alphalink.com.au
wrote: