ram3500-RCU
Posts: 1821
Joined: 8/17/2002
From: n. canton,
OH, USA
Status: offline
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quote:
ORIGINAL: BHskybolt
That is looking really good.. I can't wait to get them templates and start on my booms.... I have the wing just about finnished and I am in the middled of fiberglassing it.. What size wheels are you using? Also I have been looking for a formula for calculating Scale.... I notice in a couple of previouse posts that you refer to some of the mods your making are close to 1/7th scale, How are you figuring this out? I have a Three view that I want to have enlarged the size of this P-38 and that is why I am asking...
Thanks,
Brad
Brad, the full scale P-38 J had a wingspan of 52'. 1/7 of that is 89 1/8" and our plane is just under 90". So I am using 1/7 scale as a very close place to start with all my calculations.
I have a book by Bert Kinzey on the P-38 called D&S (detail & scale) volume 58 part 2 (P-38J - P-38M). In it you will find lots of good pictures and three views but it also has a page of three views with all the major dimensions on it (missing in the Walk Around books). I got this book at Borders Book Store.
It is a simple matter to take any of dimension shown, and divide by seven, for our plane. For instance, the full scale main tire - 36", 1/7 of that is 5 1/8" which should be our main gear tire. I cheated that down a little to 4 3/4", still much larger than the ones in the kit. The full scale nose gear tire is 27", 1/7 of that is 3 7/8" and I am using one 3 3/4". Interesting that the yoke built into the Yellow Aircraft nose gear does not allow you to use the 1/6 scale size tire for that plane.
As far as the templates and instructions go, I am saving copies of every part I'm putting in her, but will wait till she is on all three gear before I release the stuff to make sure it all works to my satisfaction and I want to make sure my angles and locations are right for the mounting plates and all. I have to get her back on her feet and see how the static angle of attack is also. The top of the rudders on the full scale were 9' 10 3/8" and the canopy was 9' 9 5/16" off the ground when parked. Ours should be 16 15/16" and 16 3/4" respectively, or somewhere close, and I don't have the nose gear in yet, to test that. You can see from these dimensions how nose high she sat on the ground. The bottom of the rudders were only 2' 9 3/8" off the ground hence the need for those bumpers they had on the bottom!!
I may need to add the curve to the center pod as well, something I have been debating for weight considerations. But, on the other hand, that would give me a nice roomy place to install a good size air tank for the gear, not to mention how much better it would look with a curved gear door. I think I could blend the nose into the stock fiberglass nose cone and still make it look a lot more scale.
BTW, I'm using the Robart spring down air up nose gear for positive lock on the nose. Don't want to scuff the nice cone that comes in the kit.
< Message edited by ram3500-RCU -- 2/3/2008 8:11:36 PM >
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RE: Nitro 90" P-38 (1/7 scale) with 3 piece wing ... - 
