Marklo Posted August 30, 2019 Author Share Posted August 30, 2019 Dry fitted with buttons (wheels), decking, rudder and prop in place (that's a cocktail stick btw) Looking Pleased with how it's coming together. Next job some more struts, clean up the wings and some interior detailing. 6 Link to comment Share on other sites More sharing options...
pheonix Posted August 30, 2019 Share Posted August 30, 2019 How on earth could you scratch build this so quickly?! That is looking super - the corugations on the wings are not at all over heavy, the prop looks very good and the whole is coming together extremely well. Just wish I could build one as quickly!! P 1 1 Link to comment Share on other sites More sharing options...
clive_t Posted August 30, 2019 Share Posted August 30, 2019 Looking really nice there! 1 Link to comment Share on other sites More sharing options...
Brandy Posted August 30, 2019 Share Posted August 30, 2019 Wow, this is coming together extremely quickly! Ian 1 Link to comment Share on other sites More sharing options...
Marklo Posted September 2, 2019 Author Share Posted September 2, 2019 (edited) Current state of play. Lots of fiddling over the weekend. Mostly cleaning up the wings with my new favourite thing Citadel Liquid Green stuff. filing small gaps etc. Thanks for all the nice feedback. As with all things modelling it's down to wether you're enjoying it or not. Not sure why but I'm really liking this build (wichi si probably why the rest of the queue is languishing ) As for the speed I suppose when I'm into a build I can move pretty fast. I do reckon that with scratchbuilding a good plan is half the battle, e.g. it took me over a week to figure out the best method for the corrugation, but only around a day to actually do it. Also the JI is mostly fabricated or carved which is a whole lot quicker than molded of shaped parts (my PFalz DR1 is taking ages to get the wings right, more anon) I must admit I'm very pleased with the build and will definitely be dusting off my DI and adding a J10 (found a set of plans over the weekend 1983 airfix magazine; Ray Rimmell so I know they're good) As you can see this whole business is stressing out my cat (no he's not dead, just very old and asleep) Edited September 2, 2019 by Marklo 3 Link to comment Share on other sites More sharing options...
Marklo Posted September 16, 2019 Author Share Posted September 16, 2019 JI now standing up on it's own. Paintwork is still rough but probably dearly there, just need to neaten up the demarcation lines. Of course this was my larger task over the weekend (apart from cutting a two seat bench down to 1 1/2 to get rid of some rotten timber) I made a paint rack and reorganised my workspace really pleased with that I may have finally brought order to chaos (well sort of) 5 Link to comment Share on other sites More sharing options...
clive_t Posted September 16, 2019 Share Posted September 16, 2019 Looking great, nice office too! 1 Link to comment Share on other sites More sharing options...
pheonix Posted September 16, 2019 Share Posted September 16, 2019 Certainly looks like a JI - not too much left to finish now. P 1 Link to comment Share on other sites More sharing options...
Marklo Posted September 16, 2019 Author Share Posted September 16, 2019 It is progressing well. Still working on my trailing edges. And I’ve run out of 1mm brass rod so may need to wait till I get some more before progressing. Still can work away on the interior and the engine. 1 Link to comment Share on other sites More sharing options...
Marklo Posted September 19, 2019 Author Share Posted September 19, 2019 The JI gets an engine and a petrol tank er pilots seat, can't imagine sitting on 600 liters of fuel was all that reassuring... 3 Link to comment Share on other sites More sharing options...
pheonix Posted September 19, 2019 Share Posted September 19, 2019 57 minutes ago, Marklo said: The JI gets an engine and a petrol tank er pilots seat, can't imagine sitting on 600 liters of fuel was all that reassuring... The reason why pilots (and sometimes observers in 2 seaters) sat on the fuel tank was because of the centre of gravity. Designers were trying to keep the longitudinal balance of the aircraft as even as possible - when the fuel was used weight would be lost, altering significantly the balance of the aeroplane. By having a crew member in the same place as the fuel the changes in cg would be reduced and stopped the latter from moving too far. I agree that I would not have enjoyed the idea of having all that inflammable material under my seat, but then I would not have been happy to have it in front of me either as in many single seat aircraft. P 1 Link to comment Share on other sites More sharing options...
Marklo Posted September 20, 2019 Author Share Posted September 20, 2019 I suppose it was moderately better than the upper wing or just behind the engine, and to be fair early aviators were taking their lives in their hands. But if you read accounts like no parachute’ being burned in a fuel fire was most fliers worst nightmare. Link to comment Share on other sites More sharing options...
Brandy Posted September 21, 2019 Share Posted September 21, 2019 (edited) On 9/20/2019 at 12:57 AM, pheonix said: By having a crew member in the same place as the fuel the changes in cg would be reduced and stopped the latter from moving too far Almost, P, but having a crew member in the same place doesn't reduce the effect on cg change. That depends on where the fuel is, not where the crew are relative to it. There are two points on an aircraft design that are important: centre of lift (the average point at which the wings lift acts), and centre of gravity (the average point at which the the weight acts). Obviously the closer the two are the better the aircraft will fly. Centre of lift is fixed and is dependent upon the wing design and placement. Centre of gravity, as we all know, varies. If we put the variable weight, ie fuel, which could vary anywhere from near empty to full, close to the centre of lift, we reduce the effect it has on the centre of gravity. The pilot's seat on many of these early aircraft is almost central above the lower wing and therefore very close to the centre of lift. If it's between the centre (fore to aft) of the lower and the centre of the upper wing it will be even closer. Therefore fuel load has a minimal effect on cg. You'll also notice on many later aircraft that they are designed to be flown solo from the rear seat, since adding a person over the wing, near the centre of lift, has a minimal effect on balance. Ian Edited September 21, 2019 by limeypilot 1 Link to comment Share on other sites More sharing options...
pheonix Posted September 21, 2019 Share Posted September 21, 2019 Thank you for the corrections Ian - I have learned something from this too! Obviously I am not a pilot!! P Link to comment Share on other sites More sharing options...
Marklo Posted September 24, 2019 Author Share Posted September 24, 2019 Good explanation of the physics, still wouldn’t fancy sitting in all that fuel, mind you would be surrounded by armour plate, but it probably was only enough to stop small arms fire. i also note that the pilot is almost completely under the upper wing so his view must have been terrible. but an interesting fact (courtesy of my Airfix magazines) the JI has the distinction of being the only WWI aircraft specifically designed for its role of army cooperation. Link to comment Share on other sites More sharing options...
Bandsaw Steve Posted October 1, 2019 Share Posted October 1, 2019 Awesome work! Especially on the corrugations. Really good. 1 Link to comment Share on other sites More sharing options...
Marklo Posted February 28, 2020 Author Share Posted February 28, 2020 Dusted off this one. Decided to give the purple a go. Freehand lines with my noname airbrush, worked out well. 5 Link to comment Share on other sites More sharing options...
rob Lyttle Posted March 1, 2020 Share Posted March 1, 2020 Of course! I saw this now that it's back up and running. Love that purple on the green. 1 Link to comment Share on other sites More sharing options...
Marklo Posted March 6, 2020 Author Share Posted March 6, 2020 Out with the Lego for an assembly jig. 3 Link to comment Share on other sites More sharing options...
Marklo Posted March 7, 2020 Author Share Posted March 7, 2020 Now stuck together and with some of the struts in place. 2 Link to comment Share on other sites More sharing options...
Marklo Posted March 10, 2020 Author Share Posted March 10, 2020 More struts, where arrangement. 1 Link to comment Share on other sites More sharing options...
pheonix Posted March 10, 2020 Share Posted March 10, 2020 That strut arrangement looks fun to insert - but at least it is not in the True Scale so you have more room. Looks very good from here. P 1 Link to comment Share on other sites More sharing options...
Marklo Posted March 10, 2020 Author Share Posted March 10, 2020 I don't think that I could hack the struts in a smaller scale. But yes they look good once fitted( which is more than you can say for my demarcation line, some retouching required I think) Link to comment Share on other sites More sharing options...
Marklo Posted September 15, 2020 Author Share Posted September 15, 2020 Back on to this one. I’m going to try to finish it off. Added a few bits and pieces, rudder, prop, ip and pilots seat. Not a huge amount of work left, but I’m dreading the decals. Waiting for a set in the post but I instead I’ve decided to raid the stash. More to follow. 2 Link to comment Share on other sites More sharing options...
Marklo Posted September 25, 2020 Author Share Posted September 25, 2020 ip and stuck in place as well as the decking between the two cockpits. The observer needs a seat and a parabellum but I can finally permanently fix the upper wing. That leaves decals and a few extra undercarriage struts and a tail skid and it’s finished. 1 Link to comment Share on other sites More sharing options...
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