John Timmis
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Everything posted by John Timmis
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Hawker Hurricane by John Timmis
John Timmis replied to John Timmis's topic in Build Blogs and Kit Reviews
Hi all Here are some photos of the recent progress. Still some way to go but getting there. Cheers John -
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Winch launching gliders. Lots of power under your thumb. 8 litre chevy engine, 400hp, 0-60 in 3 sec. Great.
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Hi Danny Sorry for the late reply. Re the bits: please put me down for a hinge set & a vac form spinner. There is lots of time to cut out the wooden bits,most of the ribs are identical profile. Can cut the brass bits myself & will probably do a wooden cowling. Cheers John.
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Hawker Hurricane by John Timmis
John Timmis replied to John Timmis's topic in Build Blogs and Kit Reviews
Hi all The receiver battery has been mounted in the lower cowling, underneath the speed controller. It is velcroed onto a ply divider which will also direct cooling air over the speed controller. The fibreglass cowl was cut on the scale panel lines to give access & will be held in place by a tongue & magnets. The other bit of progress has been the cockpit canopy framing. I wondered how to do this for a while. People always seem to look at the canopy area first so it needs to look tidy. What I really wanted was a frame from litho but this was something I hadn't tried before. Advice was found in an old mag article written by David Vaughan that confirmed that this was a good way to go. The canopy has to be masked off & then the litho framing can be glued down with evostick thinned down with cellulose thinners. The only tricky part of the frame was the front windscreen frame. The annealed litho was clamped between ply formers & gradually persuaded around the curved edge. Several more annealings were needed before the frame could be cut free. Hope it doesn't end up a gooey mess. Cheer John -
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Congratulations Danny. Brilliant result. I'm dead chuffed for you Cheers John
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Hawker Hurricane by John Timmis
John Timmis replied to John Timmis's topic in Build Blogs and Kit Reviews
Hi all Well the result was that the speed controller got hot pretty quickly. I've moved it to below the battery tray where the rx battery was. There is still lots of room for the rx battery in the lower cowling. The hole in the bottom of the fire wall has been enlarged so there should be a nice cool blast of air over the speed controller. Since the lower part of the cowl is a closed volume the holes in the battery tray have been enlarged. Cooling air exits via the wheel bay. It looks as if it should be ok now. Cheers John. -
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Hawker Hurricane by John Timmis
John Timmis replied to John Timmis's topic in Build Blogs and Kit Reviews
Hi all The batteries are sorted. The electrical gubbins consists of a 500 k/v motor fitted with a 15"/8" prop, a 70amp speed controller, a 6 cell lipo plus a battery for the radio side. The photos tell the story. Easy access to change the battery through the top hatch. The esc is next to the battery. The next thing was to put it all on the kitchen scales. It came out at 11lb 2oz. Brian Taylor says on the plan that his model was 10lb 2 oz ready to fly but without fuel. Not too bad then. But, (why is there always a but?) getting the cg in the right place took another 15oz of lead right in the nose. So, call it 12lb, should still be ok I think , but it feels awfully heavy to me. Will somebody please tell me that it will fly ok. I turned an open mold on the lathe & cast a lead ring to fit the inside of the cowling. I'm thinking about cooling now. I don't want to have to cut out lots of non scale holes. The cooling air can escape the battery bay & exit via the undercarriage opening in the wing. The plan is to tether the model, run the motor & see if anything gets hot. That's all for now. Cheers John. -
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