Wishing you and yours a happy, safe and RV-filled weekend.
v/r,dr
I like this idea and had one of my own shortly before this thread popped up. My largest temp differential is between #2 and #4 (I think this is typical) on an angle valve engine. Angle valve engines sometimes have issues with coked oil in the exhaust valve guides. The exhaust and exhaust valves are on the rear of the cylinder (R side of the images). I wanted to make a baffle that spans from the boss on the case to the baffling on the outside, and directs air into the fins on the front (#2) cylinder, which would also decrease the airflow to the #4 cylinder. Maybe a slight bend on top to direct the air.
Of note, it's an angle valve engine, and my CHTs are basically always cool. On a hot day in a slow climb off a high elevation airport, I can make #2 just barely hit 380 sometimes, but 300-320 is more typical. My concern is more about delta between cylinders than absolute CHTs.
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v/r,dr
30 Years!
First flight of my RV6 was on this day in 1996 after 4.5 years of building. I thought I would never finish it. 30 years goes by way too quick. Took her out for a ride around Sedona this morning. May 26, 1996, Danbury, CT: May 26, 2026, Sedona, AZ
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First Flight: Peter Nunn’s RV-3 | New Plymouth, New Zealand RV-3 #11523
https://www.vansaircraft.com/first-flights/peter-nunns-rv-3/
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RV-7A #73840
Well, I've officially started building an RV-7A I'm the third owner of this Kit and if you haven't read Vans warnings about buying older kits, particulary the bit about unboxed, original packaging you should. When I unboxed the kit for the first time in its 14 year life, this is the result of...
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Painting with John….
While we had our first two RV’s that we built (in Texas) painted at GLO Custom, a great paint shop in Fort Worth “back in the day”, our subsequent builds (in Nevada) have gone a different route. The Tundra and eXenos have never seen paint, but the little jet and now the F1 Rocket have been...
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Lycoming #4 CHT Too Cold
There's a title that might catch your attention. Over the past 20+ years, on two RV-7s equipped with an IO-360-A1B6 (200HP, Angle Valve, Roller Lifters, Piston Squirters, Dual EI, 20°BTDC base timing), one parts built (Aerosport Power - Bart Lalonde) and the lycoming factory, I've...
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Of note, it's an angle valve engine, and my CHTs are basically always cool. On a hot day in a slow climb off a high elevation airport, I can make #2 just barely hit 380 sometimes, but 300-320 is more typical. My concern is more about delta between cylinders than absolute CHTs.
Metal printing might be a thing now......
I know that 3D printing metal has been around for a long time. I must admit the last time I looked into it, they were having a lot of technical issues with the laser sintering process. and to me it looked pretty bad so I did not look into it further. I was about to start TIG welding my oil...
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Control System Q. Section 39, Page 3: F-1089 rod-end engagement
Hi, I am working on Section 39, Control Systems, and have accurately followed directions to create the forward elevator pushrod F-1089. I am concerned that the rod end bearing engagement on either end is only 5/16” not including the jam nut. I am trying to understand what the minimum safe...
vansairforce.net
OFF TOPIC:
Please consider donating annually to help keep this American 1-person pirate ship afloat:
THE VAF LIST (a list of RV-related lists)
https://vansairforce.net/threads/the-vaf-list-a-list-of-rv-related-lists.223964/
Get your VansAirForce.net Charity Cap!
VAF Charity Cap: Help your charity and promote this site.
Get the cap all the cool kids are wearing! I don’t get a penny. It’s around $15. $5 more if you want your N-number on the back (I put 'STAFF' on the back of mine because it makes me laugh. Put STAFF on yours too if it makes you smile). And down the road $10 to the charity of your choice...
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Past ‘VAF News’ issues:
Doug's Area ...The VAF News, About VAF, My Resume
Pushed out every now and then.
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