Zflyer Posted February 9, 2022 Share Posted February 9, 2022 (edited) Purchased a Replikit "Kyten" some time ago. Delta wing. It can apparently use an edf or pusher. Anyone have any knowledge? I have a 50mm edf which may fit. Edited February 9, 2022 by Zflyer Quote Link to comment Share on other sites More sharing options...
William Macleod Posted February 9, 2022 Share Posted February 9, 2022 Original designed by Graham Dorschel who does the Vulcan. He is on Facebook or if you pm me I can give you contact details. Bill Had one from Graham it was electric and flew great Quote Link to comment Share on other sites More sharing options...
Zflyer Posted February 9, 2022 Author Share Posted February 9, 2022 Thanks William. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 11, 2022 Share Posted February 11, 2022 Here’s my one, maiden flight today, brilliant. I think that you will need a 90mm edf to power it! Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 12, 2022 Share Posted February 12, 2022 Video of maiden flight 1 Quote Link to comment Share on other sites More sharing options...
Kevin Fairgrieve Posted February 12, 2022 Share Posted February 12, 2022 Nice one Ron, I look forward to seeing it in the flesh. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 12, 2022 Share Posted February 12, 2022 Thanks Kevin, it will have an FC, GPS and FPV kit in it by then and maybe even 5s! 1 Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted February 12, 2022 Share Posted February 12, 2022 5S? Eek - that'll shift...... Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 12, 2022 Share Posted February 12, 2022 What? , that’s not very kind………………oh you said shift! 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 13, 2022 Share Posted February 13, 2022 Video of second flight, trying out stall, glide, inverted flight, spin, CG etc. certainly need to change the CG and launch finger holes (too deep). The problem with trying to move the battery back is that it’s buried in the rear fuselage and can only be accessed through the cockpit. I may need to make a hatch in the rear fuse to make the battery placement easier. Quote Link to comment Share on other sites More sharing options...
Zflyer Posted February 13, 2022 Author Share Posted February 13, 2022 There is a YouTube video showing the designer using twin edf's on one 9f his. I don't know what size I suspect 50mm. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 13, 2022 Share Posted February 13, 2022 They were twin 70mm edfs! Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 21, 2022 Share Posted February 21, 2022 I’ve re-propped it now, it was running an 8 x 4 but it’s now a 7 x 7. Ground testing shows the following: On 4S - 500 watts @ 40 amps, on 5S - 800 watts @ 60 amps. As the model weighs 3.75lbs it should go quite well on the 5S setup but as I’m wary of hand launching with that bacon slicer ‘out back’ I’ve made a launch trolley from some 20mm conduit. And with extension pieces it can be used for others too 2 Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted February 21, 2022 Share Posted February 21, 2022 Tiz a thing of beauty Ron. ? 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 22, 2022 Share Posted February 22, 2022 All stickered up and RunCam Thumb fitted ready for tomorrow's flying. With its mates, all ready to go 2 Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted February 22, 2022 Share Posted February 22, 2022 Lovely Ron, enjoy. ? Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 23, 2022 Share Posted February 23, 2022 Neat launch trolley Ron. You conduit when you B&Q it.? 4 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted February 23, 2022 Share Posted February 23, 2022 Really windy conditions today which were across the runway, this made using the trolley a bit difficult as it hasn’t got steering and the ‘planes I tried it with haven’t got rudders! So hand launch for the Kyten and it’s only flight was using 4S on the 7 x 7 prop. Very pleased with the new RunCam Thumb, but forgot to switch the GoPro (hat cam) on for the start of the flight! To give some idea about the crosswind, here is a light aircraft coming in to land. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted March 5, 2022 Share Posted March 5, 2022 Second session with the Kyten in less windy conditions but very grey and overcast sky. this time running a 5s which gives it a lot more punch. I also remembered to switch the GoPro on for the start! 2 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted June 2, 2022 Share Posted June 2, 2022 Kyten R.I.P ? After many flights it met its end today on its second flight of the day. I had been flying around for a few minutes then came down for a ¼ throttle fly by, there was a could of smoke and all control was lost with the Kyten rolling into the ground from about 30 feet - total write off. There culprit appears to be the ESC which burnt out one of the 3 phase cables to the motor (which is unharmed!). 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted June 5, 2022 Share Posted June 5, 2022 (edited) From my post above: ’There culprit appears to be the ESC which burnt out one of the 3 phase cables to the motor (which is unharmed!)’ Having dismantled the model to recycle various bits, the actual culprit has been revealed Shame that I didn’t have a UBEC and separate battery pack powering the servos, that would have saved the model. Easy to be wise after the event! Edited June 5, 2022 by Ron Gray 1 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted June 5, 2022 Share Posted June 5, 2022 RECYCLE! That's just little more than a scratch Ron. I had a mid air with my B.T. Tempest same day as your mishap, it took the wing off and the fuselage with a 5s 5000 up front found the quickest way down, apart from a small hole the wing was ok. It's ready to fly again. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted June 5, 2022 Share Posted June 5, 2022 And it wasn’t going that fast and wasn’t too high but the grass strip is as hard as concrete! Quote Link to comment Share on other sites More sharing options...
Chris Walby Posted June 5, 2022 Share Posted June 5, 2022 (edited) 35 minutes ago, Ron Gray said: And it wasn’t going that fast and wasn’t too high but the grass strip is as hard as concrete! Ron, So do you think the motor took the ESC out or the other way around? IMO, the ESC is most inefficient at low throttle settings (produce the most heat) because of the switching of the power transistors. On that basis I would say the ESC power transistors (on one phase) failed and cooked the motor winding. It must have been a high current as it damaged the insulation on a motor cable. with that much current going through the ESC it probably over heated the components on the BEC side and killed that. Any noise prior to loss of control? Who is the manufacturer of the ESC & motor BTW out of interest? As the motor and ESC are cream crackered could you do me a favour and just strip the heat shrinking sleeve on both the motor and ESC bullet connectors? Just a theory? PS IMHO the moor windings on the non damaged section look quite ropy and to be honest ..not really surprised the motor gave up when the windings are as poorly wound as that. Edited June 5, 2022 by Chris Walby Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted June 5, 2022 Share Posted June 5, 2022 The esc is (was) a Hobbywing Skywalker and the motor was the one in my old Motion RC Havoc listed as Skynetic. I’ll dig the bits out of the bin and post up some pics for you Chris. There was no noise or any indication anything was wrong prior to the crash, I was coming through nice and straight at about 25% throttle, 20/30ft off the deck when there was a plume of smoke and it flick rolled into the ground. There was no response to Tx wag stickling. I don’t really understand why it rolled, if the motor / esc packed up and the Rx lost power then I would have thought that the control surfaces would have stayed as they were, neutral for level flight. I must check the Rx! Quote Link to comment Share on other sites More sharing options...
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