Mailing List lml@lancaironline.net Message #16857
From: Marvin Kaye <marv@lancaironline.net>
Subject: Re: O-320 in a L-235
Date: Fri, 20 Dec 2002 11:22:39 -0500
To: <lml>
Posted for CavittP@aol.com:

Jarrett:

Here's a snap of my instrument panel.

Any time you want a ride in my Lancair, gimme a call.  Always looking for excuses to fly...

I have the O-320-E2D 150 HP.  The prop I use is a Aymar-Demuth 62X76 composite.  An excellent propeller...

Static RPM is 2250, so I don't get much HP initially, but during climb at VX (85KIAS) the tach shows about 2350 RPM, and at VY (105KIAS) about 2450 RPM.  Not much of a problem at low density altitude fields, but cause for lots of pucker factor at high density altitude fields, such as Flagstaff, AZ - 7,000' MSL.  Am saving my pennies for a MT constant-speed (about $10,000)...  The ones I've flown with this prop have much better performance than with a fixed-pitch...  It turns into a different airplane...

Normal climb speed of about 120 - 130 KIAS yields about 1300 FPM and the tach shows about 2550 RPM.

Cruise speed at 2700 RPM (I still have 3 inches of throttle travel remaining at that RPM) gives around 180 KTAS +/- 5 depending on CG and temperature.  Mostly I get 180 KTAS out of it at that RPM and most altitudes up through 9,000 feet.  Above that I run up to 2800 RPM and get the same speed, with still more throttle available.  If I open it up, the RPM runs up to about 3,000, so you can see there is a need for a constant speed prop.

Fuel burn averages 8.5 GPH.  I carry a maximum of 54 gallons.  The longest flight I've had is San Diego to Seattle a distance of 960 NM.  The flight took 6.5 hours.  I still had 4 or 5 gallons remaining when I landed.  I usually run power settings so I get 170 KTAS when going long range, and that produces about 7.5 GPH to get that performance.

In cruise, each 100 RPM results in about 10 KTAS - up or down...

Takeoff distance at sea level is about 1,000 feet.

My empty weight turned out to be 1050# and I set my maximum gross weight at 1650# which means I can go 2 hours with an hour reserve when there are two big guys onboard.  By myself I can top it off and still have some allowance for baggage.

Landing, with an approach speed of 80 KIAS over the fence, and a touchdown at around 65-70 KIAS produces a landing roll of about 1500 feet with very light braking.  The wheels and tires are quite small, and brakes aren't the greatest, but adequate.  Basically I never go anywhere I wouldn't take a Cessna Citation into - that way tires last a lot longer...  Recommended tire pressures at 40 PSI for the mains, and 30 PSI for the nose.  Also, get Ong's debongers for a much better ride while taxiing and dramatically better landings vs. the donuts.  Well worth the investment.

So far, I've got almost 1,000 hours on my little plane with very few problems - none of which have been airframe related.  Mostly magneto problems.  I had one poop out on me last winter so had it overhauled.  The other one is of the same vintage so will likely quit on me pretty soon, at which time I'm going to replace it with an electronic CDI on that side while retaining the good mag on the other side.

First flight was August '97 after 4.5 years of building.

Looking forward to chatting with you further.  Anytime you wanna ride, gimme a call.

Cheers!

Pete Cavitt - N320PL
619-701-0784
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