Something many 3D pilots seem not to know is that contrary to popular belief, 3D airplanes can also be flown in a pattern at altitude.
I have found myself the new owner of a 40-size CAP 232 airframe. I don't do 3D, but hey, free airplane is free. And if I didn't take it it was gonna get smashed and trashed. So hey.
Gonna throw my Enya 45 on it most likely, set it up more like a Red Bull Air Racer. Prop it for speed rather than hovering. Show these guys that the wings on these aircraft are there for more than making it look airplane-ey.
The prop certainly has something to do with it. The manual recommends a 9x7 2-blade as the steepest in the 9-inch range so I can see why a 3-blade would load it down a bit. I doubt you'll get much better results with a different prop though; I doubt the engine really has the oomph to haul the plane with the authority you'd want it to.
It was a bit of an experiment, a shot in the dark. That little thing is a powerhouse for its size. I will look into things more over the day tomorrow and maybe take it back down there Sunday.
Though it begs the question, do you get better results with that engine and prop combo on the bench? If you do, something else in there is playing up.
It can swing a 10-6 at 10,000RPM on the bench. It can only get something around 8k or so on a 9-7-3 in flight. The difference in load between the two props should not be enough to account for that large of an RPM drop; the engine should be able to pull that plane around just fine with this setup. Definitely not enough power to prophang it but that wasn't the case on the old H-40P either nor is that even what I want out of it!
Well, that, and I
know the linkage is wonky because when I got it back to the start stand I watched the throttle arm moving and could nudge it quite a bit further open after the servo stopped pulling. I think the throttle rod is binding on something and stretching. It's Z shaped and running alongside the fuel tank; the foam in there might be too tight?
I can run a 10" prop on Speedyboi but the ground clearance is so tight you're measuring it with feeler gauges at that point. If I flew off grass 10" props would be off limits.
I picked up a $35 OS 25FX that runs ok when I hit the LHS today. I might try once again with flying Speedyboi on the Magnum 30....I was up there with it pinned for 10 minutes and only used about a third of a tank!...but if I can't get that little thumper to pull that plane with enough authority to do loops and cuban eights I'll swap the 25FX in.
I
really wish I could get the rear main out of the H-40P. That engine, on a 9-7-3, in that airplane, is a match made in heaven and that stubbornly welded in rear main bearing is the only thing keeping me from completing the overhaul I started. I might just have to find a local machinist willing to get in there with an endmill and turn the old bearing into confetti just so I can get the new one slid in there; already have the front main and the ring replaced.
I've been thinking about my own Magnum engine though. I looked at some footage I took of it flying the other day and the prop whirring sound doesn't sound exactly... like a propeller. I really hope it isn't a bearing going bad. Perhaps a 3-blade just has a different sound that I'm not familiar with.
yeh no that's a bearing that isn't turning anymore.
That's what yours should sound like as well. Same engine, same prop, pretty sure we're even running the same plug and nitro %.
