Timo Starkloff Posted January 10, 2021 Author Share Posted January 10, 2021 The shape is not invented by Germany, Timo. Flying high requires a bigger wing because of thin air and high ratios are more efficient. Westland Welkin looks the same, just with two engines (they just made the mistake of too thick airfoils). The Canberra seems to be an exception for that. NASAs WB57 still flies for measurement missions. Do you know from which book these drawings come from, Pert? The high quality 3view of the P.1091 Stufe II must be from the same source. Would be interesting to find that book. Several versions of the 109 were built and flown, including the 309 for example. None was able to replace the 109. Considering the deficiencies of the 109 that shouldn't be a problem, one should think. But they always thought of a quick ans simple replacement with using many available parts. Which doesn't work to produce a competitive fighter. I decided to stay with the Stufe II version and applied some details to wing and fuselage, although made from thin balsa and shaped for low air resistance not to worsen gliding. But raised details are better visible on the model rthan just painted ones. Elevator is cut out for rudder movement. Timo Edited By Timo Starkloff on 10/01/2021 16:27:48 Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted January 10, 2021 Author Share Posted January 10, 2021 Last pictures of the complete model before applying Oracover. I like the look of a wooden model. Timo Quote Link to comment Share on other sites More sharing options...
perttime Posted January 10, 2021 Share Posted January 10, 2021 Posted by Timo Starkloff on 10/01/2021 16:27:21: ... Do you know from which book these drawings come from, Pert? The high quality 3view of the P.1091 Stufe II must be from the same source. Would be interesting to find that book. ... Not exactly... The person who posted them referred to an "AJ-Press" book. A search finds a few Bf 109 books. A thread on WW2aircraft .net connects that to a publication called "Monografie Lotnicze Messerschmitt Me 109 CZ.3" **LINK** That might, or might not, be the same as "Messerschmitt Me 109 Pt. 3 Aircraft Monograph" by Robert Michulec**LINK** Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted January 10, 2021 Author Share Posted January 10, 2021 Thanks, AJ-Press is a good hint, I think it's that one: **LINK** I have that one from them, good quality. **LINK**7 Timo Quote Link to comment Share on other sites More sharing options...
perttime Posted January 11, 2021 Share Posted January 11, 2021 I think you are right. That one might only exist in Polish??? Quote Link to comment Share on other sites More sharing options...
SA Allan Posted January 17, 2021 Share Posted January 17, 2021 Timo, another great model. i'm looking forward to seeing it completed and reading how it flies. It certainly is very unique. Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted January 19, 2021 Author Share Posted January 19, 2021 I'm looking forward to it, Allan. Plenty to test with a four flap wing and just right for a new (and hopefully better) season. Magnets for the accumulator hatch added, tail attachment finished and finally started applying the Oracover. Timo Edited By Timo Starkloff on 19/01/2021 05:54:12 Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted January 28, 2021 Author Share Posted January 28, 2021 Building slowed down a bit, but the end is near Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted January 31, 2021 Author Share Posted January 31, 2021 More covering added. Twice as big as a standard 1/12 fighter, double the work. I cut the national markings and other details by hand on a cutting surface. Template and foil are attached by adhesive tape. Starts looking interesting Timo Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted January 31, 2021 Author Share Posted January 31, 2021 Wing radiators are built very thin for low drag, would be bigger when built with scale dimensions. But in the air it looks much better than just painted. Perfect for the folding prop is the fact, that the special high altitude DB engine sits more aft than in the standard 109. Enough clearance between the prop and the exhaust. Timo Edited By Timo Starkloff on 31/01/2021 19:01:21 Edited By Timo Starkloff on 31/01/2021 19:03:27 Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted January 31, 2021 Share Posted January 31, 2021 Looking good Timo. Hopefully we can see it in the air this year, once all the craziness is over. All the best. D.D. Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted February 1, 2021 Author Share Posted February 1, 2021 Shouldn't be a problem, Dwain, if the weather improves and I manage to start with the rc installation In Germany we are still allowed to go outside, meet one other person (good for throwing the model on first flight and maybe taking a picture) and even the model airfields are still open. But meeting more people again would be nice, yes. Except work we actually we keep contacts on an absolute minimum. Timo Quote Link to comment Share on other sites More sharing options...
perttime Posted February 2, 2021 Share Posted February 2, 2021 Oh. The British prototype markings surprised me. Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted February 2, 2021 Author Share Posted February 2, 2021 I wanted to have a captured plane in British markings since some time and the 1091 is perfect for that. It wasn't build so everything's fictive. Since the development of such special projects took a long time, it's easy to imagine the plane just got finished at the end of war (like the Bv 155, Do 335, Horten IX, ...). The goal was to have a different look compared to my other warbirds and it seems that worked. Actually I have the standard 109 spinner but my brother will make a new one, similar to the II version. Getting quite scale now Timo Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted February 17, 2021 Author Share Posted February 17, 2021 A short story with a good overview about the complicated story of the 1091/155 aeroplane, also how the second Bv155 prototype survived. https://airandspace.si.edu/collection-objects/blohm--voss-bv-155-v2/nasm_A19600314000 Timo Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted February 17, 2021 Author Share Posted February 17, 2021 Weight of the model is 450 grams, fully covered with Oracover but without rc equipment. Which is actually being installed. Timo Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 18, 2021 Share Posted February 18, 2021 Looking forward to flight reports Timo. Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted March 3, 2021 Author Share Posted March 3, 2021 (edited) The last steps took quite some time. Screws missing, one hinge less than needed (solved by cannibalising a crashed aircombat model), pilots needed painting (some more for other models), six servos instead of the aircombat typical 2-3, and a still cold workshop didn't help either. But finally everythings finished except some minor issues. Edited March 3, 2021 by Timo Starkloff Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted March 3, 2021 Author Share Posted March 3, 2021 And finally yesterdays weather was perfect for the first flight. No wind, warm temperatures and good visibility. Just no one else to throw the model except myself. Dry comment from my brother, what shall go wrong? Except some trimming of the elevator due to a slight nose heaviness, everything went fine. Thanks to good gliding capabilities, I was up in the air for a good time. Enough but not much excess power on climb due to only 180 Watts onboard. Smooth reactions on all controls, so the tail size is good. Good gliding speed and low sinking speed, which means I managed to find a good compromise for the angle of incidence. 1 Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted March 3, 2021 Share Posted March 3, 2021 Well Done Timo. I am Glad it all went well. D.D. Quote Link to comment Share on other sites More sharing options...
McG 6969 Posted March 3, 2021 Share Posted March 3, 2021 ... another great achievement, Timo. Well done again. Cheers Chris Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted March 3, 2021 Author Share Posted March 3, 2021 (edited) Thanks, Dwain and Chris. It is always a relief after the first meters of flying, when you realise a heavier-than-air model really flies. The train home from work arrived before I was finished with the text above. The model high up in the sky looks really good. Thermals were out of question due to late time, but with the good gliding and sinking rate it should soar well. Much fun were low level tight turns without motor, like those fancy modern gliders but with much better looks. That's when you recognise the good gliding characteristics, when the ground comes near. Butterfly flaps for landing were also tested, it didn't make much trim changes but movements have to be increased since drag was not so high. Actually I'm at 880 grams with a 3S1700 accumulator. I have two 3S2200 and plenty 3S3000 so I will try these, too. Folding prop is a 7x6 Aeronaut, a 8x4 will be tested, too. Center of gravity slightly backward. Trying to program the trasmitter for thermal (slow) and hill soaring (fast) conditions. And then there are minor details to improve like the tape on the wing servos. But with a new model I'm looking forward to the spring season ? Timo Edited March 3, 2021 by Timo Starkloff Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted March 7, 2021 Author Share Posted March 7, 2021 The servo lever was too thick for the plastic clips. Changing to the traditional metal clips wasn't good either, 4 grams instead of 0.5 grams for the plastic/cfk version. Would be a bit heavy if the servo just weighs 10 grams. It's one of the many small opportunities to bring down weight. With four wing servos thats 16 grams compared to 2 grams. Finally I sanded down the servo lever, but careful for not producing a breaking point. Timo Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted March 7, 2021 Author Share Posted March 7, 2021 Tested 3S1700, 2200 and 3000 accumulators today. No difference in flying, but fuselage is a bit cramped with the 3S3000. Not ideal wind conditions for fine tuning COG and rudder movements, so that will follow next time. Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted March 7, 2021 Author Share Posted March 7, 2021 (edited) But finally some inflight pictures ? Not the best quality, since I had to take them on my own. Quick picture with the DSLR (model gliding on it's own) and video capture with the smart phone. Due to covid lockdown I'm flying either on my own or with one other person, not on the model airfield. Timo Edited March 7, 2021 by Timo Starkloff 2 Quote Link to comment Share on other sites More sharing options...
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