I put down the phone with a feeling of near disbelief and not a little scepticism, someone wanted to give me an electric power train in return for an honest / no-holds bared appraisal. I’m a vigorous proponent of electric powered aircraft in all their forms, my squadron consists of edf jets, prop-driven planes and the odd heli with power ratings from 400 watts to > 5kw. I selected the Jetpax 110 310Kv out runner to power my Quique’s Aircraft co. 72” Yak-54, at the suggestion of Grant Oliver from Jet-Pax this motor was paired with a Hyper drive lite 100A HV 4-12s esc, also from the Jetpax product range.
My Yak-54 had already been flown with a combination of an e-flight 110 motor and Hyperion esc powered by a 9s Lipo pack so I was very interested to compare the power systems. The Jetpax motor and esc are supplied in well-presented packaging with foam inserts to prevent any shipping damage.
Continue reading » Review of JETPAX 110 310Kv Motor
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Managed to get a video of one of the local youngsters flying his 3D heli. William is one of the best pilot’s, but as you know it happens to the best of us… How to get a good basic servo/geometry setup.
What’s servo resolution mean in the RC Hobby? RC Hobby servos have a resolution of 1024 points per 60 degrees of rotation. That means although even when moving the stick slowly servos look fluid in motion they are actually only able to stop at one of these points. They look fluid because of the high resolution. This is the reason you don’t want to run low percentage ATV or D/R settings. You would end up with a control surface that has very low resolution. This would make the control surface less fluid in motion (more jumpy) and also less accurate all round including centering. Well the hobby building continues on RC Universe… The canopy mold is now made and ready for use (See pic below). We have also decided that the wings are going to be solid foam covered with fiber glass and bagged, which is quite common in the rc hobby of wing making. The profiles are printed, cut out and glued to 2mm plywood and then cut to the profile size. They are then sanded and ready for the foam cutting. Got to love the RC Hobby…
Well it is now canopy time… Canopy has 6 layers of 120g glass fiber and is now to set. Once that is set then we have a mold of the canopy and will cut the same piece out of the fuselage, and Bobs your uncle…
Now that the epoxy is cured the sanding has to take place. With that done a fiberglass layer has to added for strength. Once both sides are done then trimming and sanding has to be done again. Below is the progress so far.
There has been a lot of interest in the current Jart build and Johann a guy from South African, my home country, has passed on some tips and tricks which have proved to be most valuable. You can visit his blog here. Reed who is the designer of this killer machine has also posted the build on his site which is the home of the Jart. Do yourself a favour and go have a look at Jart World. Now the epoxy has cured and the tail been added we are well on our way with the plug. It has been sanded again with the tail fixed in the correct position. Making the plug is a time consuming exercise as you have to wait for things to cure before continuing.
Thanks Reed for designing such a wicked slope killing machine. This is the progress so far. Basic shape has been cut out of Polyurethane foam, sanded round and pointy, covered with 3 layers of epoxy with micro balloon filler.
Introducing the JR® 11X 2.4 Continue Reading…JR 11X 2.4 |
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