MattyB Posted February 21, 2023 Share Posted February 21, 2023 On 19/02/2023 at 19:04, leccyflyer said: Here's my first go at an SEMFF depron funfighter, weighs in just a tad under 250g, a Mustang III with the Malcolm hood. 30" span, laminated 6mm depron, 1300kv pole and stator outrunner, 2s1p 450 mah lipo, GWS 8x6" slowfly prop. This one has everything inside the profile fuselage accessed through hatches. My other SEMFF fighters, which were built by my pal Bob have the gear mounted on the outside and the battery in an open slot - all use the same basic configuration, all weigh 202 - 240g and all fly well. The wee Zero is the best flying model. Those SEMFF plans look really good - they have a very extensive number too… https://www.rcgroups.com/forums/showthread.php?1012551-**SEMFF-WWII-combat-planes-31-designs-with-plans-and-video** Quote Link to comment Share on other sites More sharing options...
Romeo Whisky Posted February 21, 2023 Author Share Posted February 21, 2023 Quote Hi RM, May I ask please, what prop, motor, ESC and battery did you use for this small foamy glider please ? I assume it's r + e + a + t 4 channel and you have used 4 isg gram servos ? Have you posted a "how I made it" thread for this little gem ? Info really appreciated. Hi Rich, If you mean the baby Lidl glider the three servos are all Turnigy TGY-1370A 3.7g. It's a tight squeeze under the cockpit with an Orange Spektrum R410X 4ch receiver and 6A ESC. Motor is a 1712-2290Kv 9.2g from Hobbyking, driving an EP4530 prop. Battery is a Turnigy Nanotech 2S 260 which sits inside the scooped out cockpit cover. Wingspan of the baby Lidl glider is 480mm. AUW 110g Hope that's helpful. Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted February 21, 2023 Share Posted February 21, 2023 (edited) Never intended to be a sub 250 g more a powered glider. The wing came from a 60" glider but cut down to 40" (1016 mm). A typical pod and boom, the boom is thin wall glass fibre. Everything else is 2 and 3 mm Depron with balsa spars in the wing, tail plane and fin. With an 850 mAh 3s it weighs 219g The motor is an 1500 kV Blue Wonder driving a 7x6. Flown 'bank and yank' it uses 3x3.7g servo. The elevator servo is in the base of the fin. The servo wire runs inside the boom as does the 35 mHz Rx aerial! Thrust exceed its weight so 'unlimited' vertical is possible although perhaps its most unusual feature is that at minimum cruising power it can and has flown for an hour non stop. Now quite old (7 years!) it has been repaired a few times but it is simply fun to fly. Not the best video but it gives an idea of what it does. https://www.youtube.com/watch?v=Oacs7wEVIhw Edited February 21, 2023 by Simon Chaddock 1 Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted February 21, 2023 Share Posted February 21, 2023 Hi RM, Perfect info, very much appreciated. I don't do eBay or hobbyking but will be emailing George at 4max later. Thanks again, great info. Also great info on the larger Lidl glider in this thread. Quote Link to comment Share on other sites More sharing options...
Lipo Man Posted February 21, 2023 Share Posted February 21, 2023 This is my 247g mini racer. Made from 6mm insulation foam from B&Q and powered by an 1806 drone motor with a 6x3 prop. I put a GPS speedometer in it today - maxed out at 56mph on a 3s 850 battery. I also took an over 250g version with a 2207 motor and a 1300 3 cell battery. That one topped 80mph. 😳 2 Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted March 6, 2023 Share Posted March 6, 2023 (edited) Another Depron plane that was built because I wanted a scale and compact Super Cub but ended up sub 250 g. Just so every body knows it is writ large on the wing! A one piece plane with a span of 1015mm (40"). The balsa wing struts are substantially load bearing as the wing is hollow with 2mm Depron skins and it has no spar, just a Depron shear web. The Alaska wheels are built up from 6mm grey Depron with acetate hubs. An Emax 2205 2500kv with a 7x6 prop provides the power which is supplied from a 1000 mAh 2s. It uses 4x3.7g servos (ailerons, elevator and rudder). The rudder is vital as adverse aileron yaw is very pronounced. Not a very exciting video but it is edited down from a not very exciting 26 minute flight! https://www.youtube.com/watch?v=rMUNaJQDaX0 Edited March 6, 2023 by Simon Chaddock 5 Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted March 9, 2023 Share Posted March 9, 2023 (edited) Perhaps my most bizarre sub 250g is not made of foam or balsa but 3D printed bits and tissue. The tail boom is glass fibre from a fishing pole. The 1000mm span wing is a built up structure. Spar, ribs, LE and TE all individually printed in PLA & glued together with CA. It would be lighter in balsa but that was not the point. Lightweight tissue and Eze dope is the covering. It uses an 2206 2500kV with a 6x4 powered by an 850 mAh 3s with a 12A ESC. AET control with 3x3.7g servos. As I wasn't sure how strong it might be I even tested the wing. 255g centre load (twice the full fuselage weight) supported by the wing tips. Equivalent to pulling over 6g! It weighs 220g ready to go. The tissue covering really needs warm and dry conditions but as a powered glider is does ok. https://www.youtube.com/watch?v=yiD9RIZkpUw&t=29s Edited March 9, 2023 by Simon Chaddock Quote Link to comment Share on other sites More sharing options...
Timo Starkloff Posted March 9, 2023 Share Posted March 9, 2023 (edited) Just found this below 250 grams thread. Years ago I built a 1/12 Ohka. 200 grams, around 45 cm wing span, AG03 airfoil with 1 degree washout. Flies just perfect 🙂 Exciting comparison with the 109, which already is really small already for a 1/12 fighter. Timo Edited March 9, 2023 by Timo Starkloff 5 Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted March 10, 2023 Share Posted March 10, 2023 Timo That is very impressive. I am not sure I could follow something at that speed! Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted April 20, 2023 Share Posted April 20, 2023 My latest sub 250g is an EDF and a Sea Gull. never intended to be specifically sub 250 it was built as Depron lookalike of the Plane Print Sea Gull which printed in LW-PLA. Although slightly smaller with a 1117 mm (46") span it is as hoped a great deal lighter at about 50% of the Plane Print version. As a result it also uses a smaller 30 mm EDF. It probably would be better as a flying wing with elevons and a small tail rudder, as does the Plane Print Sea Gull, but I completed is as a very close coupled conventional layout elevator and fixed fin. After much modification and CoG adjustment it flies passably well. https://www.youtube.com/watch?v=kodYniSccCA Quote Link to comment Share on other sites More sharing options...
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