Khargan Posted November 25, 2011 Share Posted November 25, 2011 would have worked with 8-10mm softcore plastic board (whittles like wood) Link to comment Share on other sites More sharing options...
Blackadder Posted January 14, 2012 Author Share Posted January 14, 2012 I've been trying to find all my posting forums as I lost the addresses when I got my new computer. To bring this up to date here is the T'hawk as of today: I couldn't sleep last night; I was wide awake at 1:50AM so I figured why not do a little work on the T'hawk until i get sleepy. Well here it is 9 hours later and I'm still working on the d--ned thing. H-ll I couldn't be paid for working this hard but the results are gratifying none the less. I just fastened on the wings (temporarily with a couple of screws so the wings have a bit of negative dihedral (Dihedral! We don't need no stinking dihedral! (especially negative)). I'm lucky today is Saturday or I'd be in a world of hurt sleepwise. -http://i.imgur.com/CqaYE.jpg http://i.imgur.com/g2nDT.jpg http://i.imgur.com/uu8qM.jpg Link to comment Share on other sites More sharing options...
Blackadder Posted January 14, 2012 Author Share Posted January 14, 2012 I've been trying to find all my posting forums as I lost the addresses when I got my new computer. To bring this up to date here is the T'hawk as of today: I couldn't sleep last night; I was wide awake at 1:50AM so I figured why not do a little work on the T'hawk until i get sleepy. Well here it is 9 hours later and I'm still working on the d--ned thing. H-ll I couldn't be paid for working this hard but the results are gratifying none the less. I just fastened on the wings (temporarily with a couple of screws so the wings have a bit of negative dihedral (Dihedral! We don't need no stinking dihedral! (especially negative)). I'm lucky today is Saturday or I'd be in a world of hurt sleepwise. -http://i.imgur.com/CqaYE.jpg http://i.imgur.com/g2nDT.jpg http://i.imgur.com/uu8qM.jpg Link to comment Share on other sites More sharing options...
Olis Posted January 14, 2012 Share Posted January 14, 2012 Looking good. The fuselage is coming on nicely, <_< Link to comment Share on other sites More sharing options...
blackbabyjesus Posted January 14, 2012 Share Posted January 14, 2012 truly incredible work, consider this topic watched! Link to comment Share on other sites More sharing options...
Blackadder Posted January 14, 2012 Author Share Posted January 14, 2012 As familiar as I am with current jet engines I'm stymied by the drum-like affairs surrounding the compressor housing and exhaust turbines on these engines. There are two above and two below and they seem to be vented with louvers fore and aft. My guess is they augment the intake air in the rarefied partial vacuum of orbital space but why they are needed on the rear as well is a mystery. After burner maybe? Anywho here are the bits components of the basic engine rough cut and ready for final shaping and assembly. http://i.imgur.com/7sKjo.jpg http://i.imgur.com/oCskQ.jpg http://i.imgur.com/AnHC8.jpg Link to comment Share on other sites More sharing options...
blackbabyjesus Posted January 14, 2012 Share Posted January 14, 2012 I'm going to go with 'rule of cool' for the extra intakes on then engines, there's absolutely no good reason for them to be there, if the engine needed a bigger intake for orbital/suborbital flight then it'd be more sensible to just have a bigger opening before the first stage compressor. Link to comment Share on other sites More sharing options...
Cain Tiberius Kondrad Posted January 15, 2012 Share Posted January 15, 2012 I 2nd the 'rule of cool' notion. Added with heavy dose of the model designer not having a clue about jet engines, air or space fairing. I have to say Blackadder, I've been following your progress for some time. And I am amazed at the level of detail you are achieving. I am planing on scratch building my own TH some time this year (I hope). But I know now for a fact its not going to be half as detailed or intricate as your own. Keep up the good work Bud :P CTK Link to comment Share on other sites More sharing options...
Blackadder Posted January 15, 2012 Author Share Posted January 15, 2012 delete this extra post Link to comment Share on other sites More sharing options...
Blackadder Posted January 15, 2012 Author Share Posted January 15, 2012 delete this extra post Link to comment Share on other sites More sharing options...
Blackadder Posted January 15, 2012 Author Share Posted January 15, 2012 I'm going to go with 'rule of cool' for the extra intakes on then engines, there's absolutely no good reason for them to be there, if the engine needed a bigger intake for orbital/suborbital flight then it'd be more sensible to just have a bigger opening before the first stage compressor. Ah but at normal air density you wouldn't need that extra air so the larger intake would not be necessary and consume more fuel. Only in near planet space would the louvers open to accumulate enough of the rarefied air for combustion much the same as the Bussard ram jet. The SR71 Blackbird is a good example of this regarding fuel economy; the higher it flies the more efficient those huge intake engines are. Clearly I am over-thinking this design. :D Link to comment Share on other sites More sharing options...
Olis Posted January 15, 2012 Share Posted January 15, 2012 You could say that again. :) Just do what you think looks good, and fits the profile. Link to comment Share on other sites More sharing options...
Blackadder Posted January 15, 2012 Author Share Posted January 15, 2012 Taking the rough cut crescent pieces, I tacked them together with a couple of dots of ambroid and sanded them to the final shape. Then separating them more or less in the middle I reversed the two pieces to see how well they conform to their mirror inages. Then I compared the ends to the middle. Happily they matched up pretty good. http://i.imgur.com/7yJuv.jpg http://i.imgur.com/vN1A4.jpg http://i.imgur.com/5h7Yh.jpg Link to comment Share on other sites More sharing options...
majorpayne327 Posted January 15, 2012 Share Posted January 15, 2012 Man that is too cool... I feel so motivated to build something right now. Very neat :P Link to comment Share on other sites More sharing options...
Inquisitor lok Posted January 15, 2012 Share Posted January 15, 2012 this should be one crazy gunship. :D Link to comment Share on other sites More sharing options...
Knights_Omega Posted January 16, 2012 Share Posted January 16, 2012 Well, I just sat down and read all of this post. Absolutely fantastic work. Most stuff I do is very small and only on the minis, but I feel slightly more inspired to spend more time working out the conversion for my Stormraven after all this. Keep up the good work Blackadder! ;) Link to comment Share on other sites More sharing options...
Blackadder Posted January 16, 2012 Author Share Posted January 16, 2012 The whatever it is cowling for the engine basic construction. The first two I made just for practice and are 23 mm long and the base flairs slightly. They will be abbreviated and used on the belly engine. The next set will be for the wing engines now that I have the specs down and will be 22 mm in length. http://i.imgur.com/0OwBu.jpg http://i.imgur.com/MGAFA.jpg http://i.imgur.com/bpVYu.jpg Only eight more to do, I do so hate the repetition! Link to comment Share on other sites More sharing options...
Blackadder Posted January 17, 2012 Author Share Posted January 17, 2012 Have a look at the prototype. This will be used on the middle engine below the hull and was practice to get the spacing down right. I bought a sleeve of half round dowels when I was building Lucie and haven't had a use for them until now. Never throw anything away is my credo, http://i.imgur.com/knLJq.jpg http://i.imgur.com/INxSa.jpg http://i.imgur.com/qqz9A.jpg Link to comment Share on other sites More sharing options...
Redfinger Posted January 17, 2012 Share Posted January 17, 2012 are you turning that pvc on a lathe? If so what bit are you using, I have always had a problem machining pvc, I find delrin much better to work with, it tends to cut as opposed to melt. Also have you given any thought to making one master engine, and then casting the rest? A pressure pot is pretty easy to build up. Ashton Link to comment Share on other sites More sharing options...
Blackadder Posted January 17, 2012 Author Share Posted January 17, 2012 are you turning that pvc on a lathe? If so what bit are you using, I have always had a problem machining pvc, I find delrin much better to work with, it tends to cut as opposed to melt. Also have you given any thought to making one master engine, and then casting the rest? A pressure pot is pretty easy to build up. All my models are scratch-built, a psychological quirk of mine. Casting is faster I suppose but it lacks the personal touch and leads one to the 'Dark Side' where 'horrors' one might seek to sell someone else's copyrighted material for personal gain. The boyscout Blackadder As for the cowling I free handed sanded the contours on a stationary belt sander so melting is not an issue. The chance of skinning knuckles to the bone is ever present but the sense of accomplishment is very real. Link to comment Share on other sites More sharing options...
recceboy Posted January 18, 2012 Share Posted January 18, 2012 You sir are an artist with this build. I have all the parts to build one, but have not had the time, due to newborn. But, might have to start a litlle at a time. thanks for posting this work of art. I might attempt some work that you have completed on mine, when my daughter lets me....... :D Blackadder, I tip my hat. Link to comment Share on other sites More sharing options...
Blackadder Posted January 19, 2012 Author Share Posted January 19, 2012 You sir are an artist with this build. I have all the parts to build one, but have not had the time, due to newborn. You see therein lies your problem, having two of my own I finally figured out what causes that. Its all a matter of priorities and abstinence make the heart grow fonder. Albeit within reason of course, The not above a roll in the hay, Blackadder Link to comment Share on other sites More sharing options...
Blackadder Posted January 20, 2012 Author Share Posted January 20, 2012 Well, back on track The drums (sic) are formed and slightly detailed there is still the intake vanes and the half round stringers on the sides but the overall effect is good. http://i.imgur.com/nUhDal.jpg http://i.imgur.com/nUhDa.jpg The 11 halves matched in size http://i.imgur.com/bk44dl.jpg http://i.imgur.com/bk44d.jpg dummyed up with cowls and exhausts Link to comment Share on other sites More sharing options...
Blackadder Posted January 20, 2012 Author Share Posted January 20, 2012 Well, back on track The drums (sic) are formed and slightly detailed there is still the intake vanes and the half round stringers on the sides but the overall effect is good. http://i.imgur.com/nUhDal.jpg http://i.imgur.com/nUhDa.jpg The 11 halves matched in size http://i.imgur.com/bk44dl.jpg http://i.imgur.com/bk44d.jpg dummyed up with cowls and exhausts Link to comment Share on other sites More sharing options...
Blackadder Posted January 22, 2012 Author Share Posted January 22, 2012 I have to say the FW engine plumbing looks more authentic. The 3D model has symmetrical plumbing fore and aft and top and bottom; it looks like he took a shortcut and just mirrored the detail. Not a big deal but not how a real engine looks plus there is no fuel control, accessory gearbox, generators or CSD's (Constant speed drives for the generators) and there is no bleed air for the pressurization and air conditioning. Close as I am to the plumbing I'm going to have to find the FW engines and particularly the bottom view. I have an excellent top view see the 4th image below. http://i.imgur.com/2psDpl.jpg http://i.imgur.com/2psDp.jpg[ http://i.imgur.com/pPOwgl.jpg http://i.imgur.com/pPOwg.jpg http://i.imgur.com/e3JSjl.jpg http://i.imgur.com/e3JSj.jpg http://i.imgur.com/MUaA8l.jpg http://i.imgur.com/MUaA8.jpg Link to comment Share on other sites More sharing options...
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