Rip n Bank
Posts: 414
Joined: 3/12/2005
From: Fort Collins,
CO, USA
Status: offline
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Captain Ron,
OK, guess I should admit a couple of things about me and this plane: this P-51 is my first giant scale (only 2.5 years in the hobby) and I've never owned, before now, an engine bigger than a Saito 100! So, while in some areas, I feel comfortable and confident (like adding flaps to my H9 60-size 'Stang), in others, like understanding gear rail requirements in a giant scale plane, it's still virgin territory!
The earlier version H9 1.50 P-51 build thread is filled with references to flimsy landing gear and weak gear rails. While the new version has much more robust stock gear, I have no clue, based upon personal experience, if the gear rails in Version 2 are up to the task; hence, my previous postings in this thread on the subject (no responses).
However, based upon close examination of the stock construction, my common sense (which my wife has yet to discover, or acknowledge), and my paranoia that makes me say "why take the chance," I added reinforcing to all the obvious internal intersection points between the rails, ribs and leading edges, especially on the forward gear rail. Didn't really take that long, and now I'm pretty sure the rails are in for the duration!
Haven't started the Saito, yet. Too damned cold and we're due for our 7th weekend of snow in a row this weekend. Yes, I'll be using an on-board glow system to help stabilize the idle on the inverted engine. Based upon my observation of Saito 180's being started at my airfield, I'll flip the prop backwards while wearing a thick leather glove to start it.
Can't wait to fly her, either, but it'll undoubtedly be a couple more months, minimum, before that happens...
Bo
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ORIGINAL: captainron
RIP N BANK
Took a chance and used my brand new fancy drill press and drilled the back plate myself. Seems to have come out good, no slop, back plate fits snug. Man, that really concerns me that your putting that much time into reinforcing the retract rails. Have you started your 220 Saito yet? I'm hearing so much about this big Saito now that I own one. Doesn't like to idle inverted, need an on board glow, hard starting when she's warmed up, likes to start backwards if your hand starting etc. Share some thoughts and experience with me on those subjects. I'm going to order a Mcdaniel on board glow system. I like the idea of just turning on the switch and starting. I also like the idea that when you idle down for landing, the glow driver comes on and keeps the glow plug nice and hot. Can't wait to fly this big stang! CAPTAIN RON.
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ORIGINAL: Rip n Bank
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ORIGINAL: captainron
REINCARNATE,
I ALSO WENT WITH THE TONY HOWARD MUFFLER FOR THE 51. YOURS LOOKS GREAT. Did you have to use filling like the instructions call for to fill around where the shroud meets the fuse? what colors did you use for painting? I've got the 220 Saito mounted up. Had to move the engine mount holes back in slightly. I ordered the Dave Brown 5" spinner, got it last night but they sent me the wrong adapter kit. It needs the extra long jam nut to receive the allen head bolt from the spinner. I got the ailerons, flaps and elevators all hinged up this weekend. Time to start installing servos and retracts. I'm also going to use screws to install the canopy, don't like to use gule on those. I was wondering about your plans on that subject.
DANG! I LOVE THIS HOBBY. CAPTAIN RON.
Looks like we're pretty much the same stage of assembly. I also just hinged up the ailerons and flaps on the wing, and mounted their sHey Captain,
ervos. Completed the stabilizer, elevator and rudder the previous weekend (sans pushrods and horns, as yet).
Yep, on the Saito 220 and Dave Brown spinner, you need the X-long 1.25 x 8mm extension. Also, I had to take the DB spinner back plate to a friend's machine shop to take a few thousandths off the center hole so it would fit on the larger diameter rear section of the crankshaft. Did you have the same issue?
Also, I spent a lot of time over the last week fiberglass reinforcing the retract mounting rails in the wing. They just didn't look robust enough for this weight bird, and this was a major complaint area mentioned about the previous version of this ARF.
ALMOST went with the scale muffler kit from Tony Howard that Reincarnate recommended, but then decided I'd first try my hand at scratch building it! I may not succeed in creating an acceptable substitute, in which case Tony's got another sale! If it turns out OK, I'll post some pics here soon.
Bo
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The more planes you have in your "hangar," the less likely your wife will notice a new one!
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RE: New Hangar 9 1.50 P-51 Build - 
