Pilot RC 122" Extra 330SC

[Joe Hunt]

It's like a F'n science project.

 

[Terryscustom]

Looks nice though, next time try this formula to make it much much easier

 

[49dimes]

Just one thing about that......It does not take in to account "Bi-Polar" shift..... because it is not a "split" cowl

 

[Joe Hunt]

First off, do we even need all this baffling if it's not a four cylinder? 3W would send me killer built planes with so many details installed, but no baffling, and they are an engine company. I have always just ran a lower ledge piece and that's all and my engines have always run cool. Although I do run them a little rich. After the first ten gallons on a new engine, when I shoot the engines with a variety of temp guns I get an average of 135F upon landing. Second, are these motors running at 150 degrees Fahrenheit, like the temp guns say, or or they running 350 degrees Fahrenheit like the guys with telemetry sensors are saying? I can hold onto my heads right after I land... doesn't seem like 350 degrees to me.

Anyway, I mostly did this baffling job for Tony Russo because he told me baffling is a big deal. And, I like Tony because he's ornery. hehe

I went with an 1/8" gap in the front because that's what I usually do. And, I went with 3/8" in the back because that's what Dave Johnson said works well:



I didn't like how the cantilevered plywood was bouncing around so I used some velcro over the prop shaft housing to snug it up:

 

[Joe Hunt]

 

[Terryscustom]

Baffling is mandatory to protect your investment with any twin. Your temp gun is not accurate when used on a reflective surface and temps on ground are not indicative of what you get on a basic up line or in certain maneuvers. Baffling is cheaper than telemetry and a safe investment. The way you did it is professional and very impressive looking but exsessive for a twin. A simple four sided structure off the front of the cowl that closes off the open are on all four sides of the head is quite adequate and pays huge dividends.

 

[Notorious B.E.N.]

Baffling is important but I see some really elaborate jobs with twins. I think if you're getting air to the front of the cylinders and keeping it from immediately going down upon entering the cowl, you're probably good to go.

 

[jhelber08]

Looks nice though, next time try this formula to make it much much easierView attachment 44650

That looks like more for magnetic fields. You have to take into account the gonkulator phase shift angle when applying it to baffling.

 

[Terryscustom]

gonkulator phase shift.....

I thought that happens after impact?

 

[bigblueswope]

I thought that happens after impact? View attachment 44654

Nice of them to crash it right by the vehicle. [emoji102]


BJ Swope