Levent Suberk Posted December 22, 2020 Share Posted December 22, 2020 I'm going to build Graupner Silentius with Vector unit and Mz4 two channel radio. Want to share photographs here within time. I change build up wing and tail surfaces with all sheet 1 mm balsa. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted December 22, 2020 Share Posted December 22, 2020 I've no Idea what vector unit means Levent, but about to be enlightened. Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted December 22, 2020 Author Share Posted December 22, 2020 Hi John, Vector unit is a servo, receiver and esc unit. It can fly models up to 80 grams weight. I am going to change it's propeller with a drone propeller for more thrust. https://youtu.be/ePt8IsL9oeQ Edited By Levent Suberk on 22/12/2020 21:19:57 Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted December 22, 2020 Share Posted December 22, 2020 That looks fun. Quote Link to comment Share on other sites More sharing options...
Gordon Whitehead 1 Posted December 23, 2020 Share Posted December 23, 2020 It sure does John Not an aileron, elevator or rudder in sight and he was able to throw the model around with total abandon using vectored thrust. Very neat and clever. Thanks for sharing, Levent. Edited By Gordon Whitehead 1 on 23/12/2020 08:10:07 Quote Link to comment Share on other sites More sharing options...
Max Z Posted December 23, 2020 Share Posted December 23, 2020 On the downside: you have no directional control on the glide, because you need the thrust from the prop to steer. This is how I know : Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted December 23, 2020 Author Share Posted December 23, 2020 Silentius is first electric model kit in the world. It is a free flight model uses dethermalizer. RC versions were made by modelers. Model need to be under 80 grams for Vector Extreme unit. I'll give a curve to balsa sheet wing by brushing Vallejo water based clear acrylic varnish on upper surface and nitrate dope on lower surfaces. I'll brush fuselage and empennage one or two coats acrylic varnish and measure total weight between coats. (Image from rc-network.de) Edited By Levent Suberk on 23/12/2020 09:52:09 Quote Link to comment Share on other sites More sharing options...
Capt Kremen Posted December 23, 2020 Share Posted December 23, 2020 Here is my replica Graupner Silentius model. It was constructed from an original plan obtained from the German Vintage Model Association, (akin to UK SAM35). The original Graupner/Faulhaber geared motor was fitted though it ran off 50mAh NiCad cells of the time (1990). I had the great pleasure of chatting with the late, great Ron Moulton who kindly gave me several original Salt-Water activated battery cells and an original Graupner Silentius prop assembly. These had been subject of testing (Aeromodeller?) when the kit was originally issued circa 1961. A very rough foam free flight model called the 'Electra' was produced at a similar time in America. This also used the salt water cells. I still have an unbuilt 'Electra' kit. My 'Silentius' model flew superbly and despite the fuse thermaliser, flew high then away towards some woods never to be found alas. In 1986, Graupner brought out another called 'Silentius '86', this was for R/C though and ran on 7-8 NiCad cells, driving the common Mabuchi 550 geared motor (Graupner Jumo 550) with its plastic folding prop assembly. This model fortunately still survives and with today's LiPo cells flies better than ever! Quote Link to comment Share on other sites More sharing options...
Gordon Whitehead 1 Posted December 23, 2020 Share Posted December 23, 2020 That's a lovely-looking Flea, Max, with the prop in the scale position no less. It must feel a bit strange when you throttle back for the first time and have no more control - I hadn't thought about that. I guess you have to position the model for landing whilst under power, then throttle back just before touchdown. Gusty winds must add a bigger than average element of uncertainty at this juncture. I remember seeing adverts for the Silentius when it came out. It seemed to be very exotic at the time. Good luck with your conversion, Levent Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted December 23, 2020 Author Share Posted December 23, 2020 Thanks for this Kremen, it looks very good. Yes, that model reviewed in Aeromodeller magazine, but which issue I don't remember. It is very nice that you have original propeller that has been given by famous modeller Ron Moulton. Electra Fly uses a Mabuchi motor? Edited By Levent Suberk on 23/12/2020 14:26:56 Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted December 23, 2020 Author Share Posted December 23, 2020 Thanks Gordon. Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted January 1, 2021 Author Share Posted January 1, 2021 Fuselage building. Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted January 3, 2021 Author Share Posted January 3, 2021 Fuselage finished with thinned dope and thinned Vallejo Model Color acrylics. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 3, 2021 Share Posted January 3, 2021 Oooh nice work. Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted January 7, 2021 Author Share Posted January 7, 2021 4 gram weight added to nose. Total weight is approximately 63 grams. Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted January 8, 2021 Author Share Posted January 8, 2021 https://www.mediafire.com/file/1p2inxkarmdhtol/A4_Silentius.png/file Edited By Levent Suberk on 08/01/2021 07:54:19 Edited By Levent Suberk on 08/01/2021 07:55:26 Edited By Levent Suberk on 08/01/2021 07:55:55 Edited By Levent Suberk on 08/01/2021 07:56:26 Edited By Levent Suberk on 08/01/2021 07:58:13 Quote Link to comment Share on other sites More sharing options...
Peter Jones 21 Posted January 8, 2021 Share Posted January 8, 2021 Really nice work and a great tribute to the pioneer Fred Militky. Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted January 8, 2021 Author Share Posted January 8, 2021 Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted January 8, 2021 Author Share Posted January 8, 2021 Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted January 8, 2021 Author Share Posted January 8, 2021 Quote Link to comment Share on other sites More sharing options...
Levent Suberk Posted January 8, 2021 Author Share Posted January 8, 2021 Quote Link to comment Share on other sites More sharing options...
Peter Jones 21 Posted January 9, 2021 Share Posted January 9, 2021 I had a Graupner catalogue with the original Silentus featured, I wish I still had that. Great work. Quote Link to comment Share on other sites More sharing options...
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