georgewaldrop
Posts: 107
Score: 105 Joined: 5/17/2003 Last Login: 6/8/2013 From: Mustang,
OK, USA Status: offline
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quote:
ORIGINAL: skylarkmk1 George, I have the same plans in my flies and I think they were based on the Paul Matt drawings. The first thing I noticed was the use of a lot of pine blocks in the construction and the use of a built up box spar (which I like). Laminated wing tip, stab, vertical fin and rudder outlines are also nice. Some weight can be saved by careful examination of the construction. Suggest getting a copy of the Nicholas Karstens UPF-7 drawings form the Bob Banka site http://www.bobsairdoc.com/ . The 3 view is S-6 2821 Waco UPF-7. I think they are just a bit more accurate than the PM drawings and use them to modify the fuselage formers and other things. There are some minor problems in the fuselage cross sections that can be easily corrected using the NK drawings to modify the fuselage formers. The fuselage is kind of weird in that just before the vertical fin it becomes almost square and ends up with the horizontal stab almost sitting on top of the fuse. From the side the fuselage looks a little sway backed compared to the YMF IMHO. The wings do not show the sheeting around the wing tip, neither do the PM drawings. The wing tips from the forward view are pretty good but could be raised about 3/32” from what is shown on the plans. The plans also show the military notch in the top wing which is the most common version, but there are a few with the shallow curve notch over the forward cockpit (civilian version). Just as a reminder, the top wing is flat (no dihedral) and the bottom wing has 2° on each side. The lower wing incidence is confusing on the Jerry B plans. The horizontal stab and vertical fin/rudder are quite thick compared to the YMF and the cross sections are not shown on the plans. The NK drawings show the cross sections as a separate drawing, the PM show the cross section on the fuse side view. The landing gear is close but not scale. I believe JB built this as a sport scale plane and not as a scale competitor. You might also get some photos from Bob Banka or I have photos of about 10 different UPF with detail shots. PM me for more info on my photos. quote:
ORIGINAL: Stickbuilder quote:
ORIGINAL: georgewaldrop Bill, I have a question about some plans I have. I have been trying to find one of the 1/5 kits and they are just a bit beyond what I want to spend right now, and I may go ahead and get the plans for it from AMA, but in the meantime, I have a set of plans for a UPF drawn by Jerry Behrens. They look ok, but don't look quite right to me. I am not proficient in the scale outlines like you and some of the others here, so I was wondering if anyone here might have checked them out in the past. These are 90'' WS I think. Thanks in advance! George, Up until now, I don't think that there have been any accurate plans or drawings for any Waco, other than some that were languishing in someone's desk. That's all changing, and pretty soon, I believe that there will be a few viable Scale plans available. Bill, Waco Brother #1 John & Bill, Thanks for the responses! This is what I like about the Brotherhood and this thread. I am not a competition level builder, never have been, and likely won't be for some time to come, but I am more interested in getting there than I have been in the past. That said, I appreciate the comments/cautions about the inconsistencies from scale of the various kits and plans sets out there. I love bipes and round engines, and I prefer giant scale modeling, so I have been looking for larger kits and/or plans for a YMF in particular and I like the UPF and YKS as well. I happened on these large scale UPF plans and decided to grab them while they were available. John, I will definitely be shooting you a PM regarding the pics you have available, and checking with Bob Banka for the more accurate 3-views you mention. Bill, I am VERY interested in the accurate large scale plans you mention may be coming soon. I really appreciate all I have learned from so many of you guys here. I hope to do a really nice [sport] scale model and learn from the process, then maybe later build a viable competition model. I have quite a few larger biplane plans/kits/projects to build, so I hope I can get a good start this summer/fall. As I have mentioned in previous posts, I returned to modeling after a 20+ yr departure only this past fall and have been sorting old projects and supplies I had rat holed and still had packed away. I am getting close to having most of it sorted out and back where I can work on my models without moving everything out first. My first project will be to finish some of the partially completed stuff in my shop or sell it to make room, and get funds, for more important projects. Among the projects I want to complete and keep, I have a partially framed StarDuster Too from the old RCKits (Bob Campbell) kit at 1/3.8 scale I believe (90+ inches) plus these Behrens plans for the 90" UPF, and hopefully the true scale YMF plans Bill mentioned...otherwise, probably the Pica 1/5th. Like many other modelers, I have more plans/kits in inventory than I will ever have time or money to complete, but I will never run out of nice planes to build! Thanks again for the info guys, and Bill, please let me know when those more accurate Waco plans become available...John, expect a PM soon.
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George Waldrop~AMA-L1307~IMAA-LM207~Have a Blessed Day! Waco Brotherhood #151 ~~ Carl Goldberg Ultimate Brotherhood #58
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