Your numbers are skewed to favor the G-38. Brillelli does post the true RTF weight, so there 36 with ignition, muffler and standoffs is 50 ounces. Add 3.5 for a battery and you are at approx 54 ounces.
The G-38 as listed at Chiefs is 67 ounces for the bare engine. Add 4 ounces for their ugly lawnmower muffler or more realistically 6 ounces for a Pitts muffler and now you are up to 73 ounces.
Now let's take the same numbers you did 1139^2 of wing and ready to fly weight with a Brillelli 36 of 13 pounds. Wing loading = 26.3 oz per square foot.
Now add the more realistic weight of a G-38 (as listed at Chiefs, not made up by me) for a total of 14.187 pounds. Wing loading = 28.7 oz per square foot.
Now let's even get more realistic about the G-38, we haven't even added a cup mount or any type of mount for mounting it to the airplane and a spring starter so he can even start it. Which now puts your airplane at 14.5-14.75 pounds. Now at 14.5 pounds you are at 29.33 oz per square foot. 3 ounces per square foot heavier than the Brillelli.
Now let's even get more realistic, you have added 23 extra ounces to the nose of a 77" airplane over a lighter engine and assume you will balance without adding some lead. Good luck. Hope you enjoy flying a brick..
These numbers are for reference only, with either engine the airplane will not build at 13 pounds.
Your kidding right? Read what you just posted. No go RE-Read what I posted about engine weights and wing loading.
The Zenoah G38
http://www.horizonhobby.com/Products...ProdID=ZENE38A
The Brillelli 36. Advertised at 50oz RTF. So thats not REALLY what it weighs RTF? Okaythen that gets it even CLOSER to the G38 in weight. Not looking like much of a bargain anymore, is it?
http://www.scottellingson.com/brillelli_engines_009.htm
The ZDZ 40 advertised at 2.86lbs BARE.
http://www.rcshowcase.com/html/ZDZ/zdz40re.html
My numbers weren't skewed to favor anything. You claim Brillelli doesn't post a RTF weight. Check the link. It saiys right there in black and white "50oz RTF"
Check all the links. Do your math again.
We both agree the Brillelli could lead to 26.3oz wing loading if the plane weighs 13lbs.
I posted the G38 would have 28.8oz wing loading and you're telling me it'll be 28.7. Last time I checked, 28.7 was LESS than 28.8 that I came up with. How did I skew the numbers to favor the G38?
The G38 is a magneto engine and it comes from the factory with a mount and a muffler RTF at 71oz. My sincerest apologies, I was an ounce off at 70oz.
It doesn't need a spring starter either.
Your post makes about as much sense as marrying a hooker that you met in Vegas. You wanna tell me again __ Where was I skewing the numbers to favor the Zenaoh?