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Date: Sat, 11 Jan 2014 12:28:54 -0500
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From: "Bill Harrelson" <n5zq@verizon.net>
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Subject: Re: [LML] Considering purchase of N301H
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Joe,

The IV is a great traveling machine.  You are, however, correct in your 
assessment of "just for fun" flying. In that regard you just can't beat the 
360.

In my experience operating an IO-550 powered IV, I have found that operating 
at an IAS in the range that you are considering (150-160 kias) will require 
a fuel flow of less than 10 gph. The higher altitude you fly the lower the 
fuel flow and the higher the TAS.  At 14,000 ft, for example, 150 kias will 
produce around 190 ktas with a fuel flow of less than 9 gph (depending on 
weight).  This assumes, of course, LOP operation.  Flying slower than these 
speeds, down to 130 kias or so, would allow squeezing a tiny bit more 
efficiency out of the IV but it's a fairly broad topped curve at these 
speeds. Your actual MPG would not be dramatically better and with a headwind 
might even be worse.

Bill Harrelson
N5ZQ 320 2,150 hrs
N6ZQ  IV  450 hrs


LML,

I've been looking at N301H (IV) as a way to get a bit more space than my 
360.  301H is listed on Controller and based in palm beach.  Does anyone 
have any gouge on this aircraft?

I'm a little concerned that at twice the $ per flight hour I won't take it 
up as often just for fun.  I'd be interested to hear your thoughts on 
cruising in a IV at max range and max endurance.  The BSFC of the TSIO-550 
is only 5-10% worse than the IO-550 according to Conti.  The cruise speeds 
ive seen quoted are far from the published L/D MAX ( max range) speed of the 
IV.  Can anyone comment on operating at a more efficient 150-160kias?

Joe Czabaranek