Ok I will do some W&B and aim for 18" CG. I have noticed that it lands better when I have weight in the cargo. I remodeled the hat rack today to get more space. I removed the plates and made a sling shelf that goes down just above the flaperon mixer. My dog is much happier with the bigger headroom. Now I need to unhook the ailerons when folding the wings. But with castle nut and a key ring, that's just fine.
What about the C/G when loading a bunch so far back in the fuselage? What max weight did you fly with in your B model? I have a C model and I am Always goping ower max gross when having passenger and full tank and some cargo. I fly carefully then and not pulling any G and baking not more than 30 degrees in level flight. But it would be nice to hear what others have survived , LoL.
Nice work! Like the strut fairings, I am also planning to do them. You said 120moph, thats awsome. I am working on a pair of aerobat wings for my Mod C STOL fuselage and exited to know what I will expect in performance. At what weight do you get 120mph? Is it a Rotax 582 and what max rpm do you get at climb?
Made a shelf for our dog Molly,she didn't like the sloping hat rack. I just taped together two lexan plates that folds out and fits on to the hat rack line a shelf. Molly loves to fly and always wear a safety belt and ear muffs.
Finished painting my cowling now, happy with the result. It's a quick fix so it's ok. I will try to tape if the two holes under the prop and get a spinner also, guessing that will do some drag reduction also.
Now I have removed the side mount in stainless steel parts and the side radiator cowling to loose more weight and drag. Doing some flight tests and haven't noticed any big difference but I am still happy to loose the weight and the ugly cowling. Now it's time to sand the fiberglass sheet and paint it. Some day I might do a proper job instead of the riveting. I also bought a GSC 3 blade 66" prop and are wery happy with it, even though it was a pain to adjust the pitch. I had to use my smartphone with an leveling app that that 0.1 degrees resolution. 0.1 degrees at 24" out from the hub gave me about 200rpm. I set it on 6100 max static rpm and that gave me 6500rpm at climbing. Spark plugs got a light chocolate brown colour.
So great success! The belly radiator performed really good! Today's flight test had ambient temp at 16C/60F. climbing 1200fpm at 50mph and still only 75C/167F water temp! But, at cruise the temp went down to 60C/140F. I think that the next step would be to install a thermostat. I am very happy about this. I managed to reduce the empty weight more than 5kg/11lb of radiators, hoses and water. I also got the CG further back. I noticed a higher cruise and more efficient elevator and lower stall speed! This forum is great!
So now I have installed the belly radiator and removed the side radiator. I will test it this weekend. The right hose from the engine top has a T connection for the expansion bottle that also has a pressure filler cap on it. If this is not enough cooling I will mount the rotax912 oil cooler parallel with the belly radiator. Hopefully that's not needed.
Very nice information. I actually have one of those radiators on the shelf from an other aircraft. I will mount it and see how it goes. Just need to buy some hoses. But does the hoses go straight up to the engine or is there any filler neck cap on the way?
So now I have removed the small radiator and the WT is up at 80C at 20C ambient. 2kg lighter at the nose and a better flying aircraft. At climb I reached 90C. I guess next step would be to replace the side radiator with a belly radiator.