THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
#1876
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
The build is going fairly well, slow but well. Stabilators are nice and smooth now and installed. Vertical stab and rudder is installed. Retracts are installed and plumbed but when i mounted the engine i realized that the muffler was pointing directly at the right main wheel well and i didn't think to fuelproof the wood retract mounts and former. I assume that i can expect some exhaust mess getting in there. Have i assumed correctly? I hate to remove all those air lines and have to fish them back through the fuse but i guess i have no choice.
#1878
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
ORIGINAL: k8svrick
Consider installing a diverter on the muffler as well.
Consider installing a diverter on the muffler as well.
#1881
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Sure, no problem. I flew mine about one season, then it has been a hangar queen ever since. I don't get enough time to fly and this summer was the worst for that. I need to be on top of the old game before I pull that out of the basement. I have a couple pylon planes and some other aerobatic ships, but the 16 is unique. It is also fast with a Dub Jett .90. It's a handful.
Rick
Rick
#1882
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
OK, took a little less that two months to build. I'm happy with that. Maiden scheduled for tomorrow morning and weather is looking beautiful in southwest Florida. [8D] Did a quick build on the canopy frame but i build to fly not to show. If i clock at 125 or better with my brand new Jett 90BSE tomorrow i'm happy. Got her all broken in and ready to fly. Video posted shortly. (if maiden is successful that is)
#1883
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Beautiful weather turned into dense fog for most of the morning on Sunday so maybe next weekend. BTW, mine came in at 10.4 pounds. How did i do?
#1884
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Apparently RCU is having hissyfits this morning, so I am posting this again since the server crapped out.
Mine came out to just under 11 pounds. I am using the Jett 90LX, sport tuned muffler, retracts and a 3000 mah 5 cell battery to counteract the effects of the engine weight.
The CG in the book is wrong if it says it should be 7 1/2" back from the L.E. at the root. See my discussion on http://ricktressler.com/id48.html
Hope you have a good first flight.
Rick
Mine came out to just under 11 pounds. I am using the Jett 90LX, sport tuned muffler, retracts and a 3000 mah 5 cell battery to counteract the effects of the engine weight.
The CG in the book is wrong if it says it should be 7 1/2" back from the L.E. at the root. See my discussion on http://ricktressler.com/id48.html
Hope you have a good first flight.
Rick
#1885
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
ORIGINAL: k8svrick
The CG in the book is wrong if it says it should be 7 1/2'' back from the L.E. at the root. See my discussion on http://ricktressler.com/id48.html
Hope you have a good first flight.
Rick
The CG in the book is wrong if it says it should be 7 1/2'' back from the L.E. at the root. See my discussion on http://ricktressler.com/id48.html
Hope you have a good first flight.
Rick
John
#1886
Join Date: Jan 2006
Location: Texarkana,
TX
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RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Actually, Rick's earlier posts were correct when he said the CG should be 7.5 inches. He did mess up on the one just before mine.
You need to make the initial flights at 7.5 inches. When you feel comfortable, fly it inverted and see how much down elevator is required to maintain level flight. If it needs a ton of down, you might move the CG back 1/4 inch and try it again. Landings are another way to know if the CG is correct. On my Cermark F-18P, I started out with the CG too far back. When I came in to land, the nose wanted to pitch up. I think the F-16P will probably do the same thing if it's tail heavy.
Here's a photo of my friend's F-16P that I maidened for him..
http://images.rcuniverse.com/forum/u...44/Wr55301.jpg
Note that the 7.5 inches is measured from the leading edge of the wing panel where it mates with the fuselage.
Lynn
You need to make the initial flights at 7.5 inches. When you feel comfortable, fly it inverted and see how much down elevator is required to maintain level flight. If it needs a ton of down, you might move the CG back 1/4 inch and try it again. Landings are another way to know if the CG is correct. On my Cermark F-18P, I started out with the CG too far back. When I came in to land, the nose wanted to pitch up. I think the F-16P will probably do the same thing if it's tail heavy.
Here's a photo of my friend's F-16P that I maidened for him..
http://images.rcuniverse.com/forum/u...44/Wr55301.jpg
Note that the 7.5 inches is measured from the leading edge of the wing panel where it mates with the fuselage.
Lynn
#1887
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Guys,
I screwed up on my post about the CG on this plane. I stated that 7 1/2" back from the L.E. at the root (where the wing meets the fuse) was wrong.
What I meant to say was that the <correct> CG is 7 1/2" back and that the manual incorrectly states the CG should be 8 1/2" back.
That is what I get for working 14 hours days.
Rick
I screwed up on my post about the CG on this plane. I stated that 7 1/2" back from the L.E. at the root (where the wing meets the fuse) was wrong.
What I meant to say was that the <correct> CG is 7 1/2" back and that the manual incorrectly states the CG should be 8 1/2" back.
That is what I get for working 14 hours days.
Rick
#1888
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
I know how you feel Rick. That's why it took me two months to put this one together. I am hoping for good weather this weekend and get her airborne. I do have the balance at 7.5".
#1889
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Thanks. It would hurt to be a tad nose heavy. With full fuel, you'll probably have that if it balances right on the CG mark. Good luck with it.
Rick
Rick
#1893
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
When I wrote that, I hadn't yet had my first cup of coffee. Yes, I meant it wouldn't hurt to be nose heavy.
TGIF
TGIF
#1894
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Discovered a bad receiver switch then got consumed by a re-modeling project making my workshop unuseable. Some day i'll maiden it.
#1895
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Finally got it airborne. I had it slobbering rich on the new engine but it was still moving along enough to get everyones attention. Sweet flying jet! Haven't viewed the video yet but i'll try to post it some time in the nar future. I like this jet!
#1896
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
Glad to hear you got that thing in the air. Mine has become a classic hangar queen. That said, if I can get some time next summer, I'll bring it out for a few flights.
Keep it up.
Keep it up.
#1897
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
The holidays are finally over and i have had some time to tweak and tune. I also replaced the air retracts with Eflite electrics. The airs worked fine but electrics are simply easier to operate and just look cool going up and down. My on-board GPS gave me 142.3mph. A visit to the pitch-speed calculator confirmed that it was probably quite accurate. RPM on the ground was a bit over 17,000 with an 11-9 APC prop on Powermaster 15%. I doubt if that's the record for this thing but i was happy with it. This is one sweet flying jet! The only problem i have now is keeping an exhaust deflector on the muffler. I have tried the Hanger 9 and Hobbico 90 size silicone deflectors attached with professional grade zip ties that were quite tight. One popped off in the air and one didn't even make it to the runway while taxiing out. I'll have to give the Macs hard pipe a try.
#1898
My Feedback: (23)
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
http://www.rcuniverse.com/forum/fb.asp?m=7591745
My fast mover. Been clocked at 140. Fun bird wish I could get a new one. Still have this one!!
My fast mover. Been clocked at 140. Fun bird wish I could get a new one. Still have this one!!
#1899
RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!
I have not had mine clocked. I am guessing - perhaps 130. Mine came out at just a hair under 11 pounds. I have the Dub Jett 90 and Dub's tuned muffler, a lighting kit, battery and a 3000 mah 5 cell pack in the tail to counter the weight in the nose from that engine. The Jett is turning an 11/8 around 12,500 on the ground but it <really> unloads in the air. Still does not get much flight time.
I have been wrestling with a radio interference problem in my 50cc Extra 260, so I have not been doing anything with R/C except trying to figure out what's going with that. Spring will be here soon enough...
I have been wrestling with a radio interference problem in my 50cc Extra 260, so I have not been doing anything with R/C except trying to figure out what's going with that. Spring will be here soon enough...