REFLECTOR: Continental info

Reiff Lorenz Reiff at Lorenz.com
Wed May 18 15:29:00 CDT 2011


I'm considering a Continental IO-550N for an XL RG. What cruise speed do you see at the settings you quoted . . .?

                Don - LOP, 12.5 GPH at 9,500 feet (fixed gear)
                Bob -- 85% power LOP,  turbo (currently only at low altitudes)

What are other XL RG owners getting for true airspeed cruise? My mission requires 200 kts true for 4 hours plus IFR reserves. Any recommendations for engine or performance mods?

Thanks!

Reiff Lorenz


From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Craig and Denise Woolston
Sent: Tuesday, May 17, 2011 8:15 AM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: Continental info

Don-

  We built our plane before pictures were all electronic but I can scan some in a couple days if you more details.  We are running -N, going on 625 hours on XL-5FG.  We do not have any cooling air going to the engine mounted cooler, but we are plumbed to a forward nose mounted cooler.  We too try to keep our CHTs below 380.  We will occasionally see 400s on a cylinder or two after climbout on a hot day after a quick turn fuel stop.  Typical flight shows CHTs from 300 to 360 with 2 typically our hottest.  We typically see 180deg on the oil in the winter and 190-200 in the summer.  We run LOP exclusively, typically see 12.5 GPH at 9,500 feet and if you believe the electronics engine analyzer around 75% power.  Besides saving gas we have seen that ROP increases CHTs 30-60 and oil at least 20 degrees.  We are based out of Lancaster in California.  Because of all the dirt and dust out here we did spend the time to build an air intake with inline air filters, that's probably the only unique thing about our install.

Craig


________________________________
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Don Johnston
Sent: Sunday, May 15, 2011 6:26 PM
To: reflector at tvbf.org
Subject: REFLECTOR: Continental info

Looking for some info on Continental IO550-N installs.

Specifically, pictures of cooling plenum installations and in particular, the oil cooler ducting.

As for finished/flying aircraft, what kind of CHTs and oil temps are you seeing?

Thanks!

Don Johnston

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