Snorbitz Posted August 16, 2010 Author Share Posted August 16, 2010 Engine on and plugged in. The yellow hook thing if you're wondering under the silencer is connected to the choke lever so i can operate it from the front with the cowl in place. I cut the exhaust at an angle to be proud of the cowl but still roughly follow the lines.Edited By Shuglu on 16/08/2010 23:55:51 Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 16, 2010 Author Share Posted August 16, 2010 Inside the fuz the fuel tank was secured and the other electrical goodies started to go in. You can see the strange angle the throttle cable passes through the f/wall at but it works just fine. i fitted remote switch control...they look like pitot tubes on the outside. I think they are better seen on a later photo. Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 16, 2010 Author Share Posted August 16, 2010 And with everything connected up. The opto isolator is cable-tied to the underside of the panel between the fuel tank and the retract valve switch. I wrapped it in foam to be safe. Its a shame you can't see it on here but you can see where abouts it is i hope. The small white tie is the position. You can also see the yellow foam i am using for the battery mount. They slide in from this side and are secured with a closing panel and yet more cable ties. Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 16, 2010 Author Share Posted August 16, 2010 The rest of the fuz interior complete with air bottle and reciever all wrapped up in blue foam. The 2 plugs tied up at the top of the pic to the air filler valve are battery monitors but i've run out of y-leads to plug them in at the moment but i'll be closly monitoring the voltages inthe early stages anyway so its not a great problem. Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 16, 2010 Author Share Posted August 16, 2010 And finally some finished shots. Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 16, 2010 Author Share Posted August 16, 2010 What i will photograph is the cut outs to the cowl for the exhaust and additional air vents i've cut in the bottom of the cowl because to be frank there's little or nowhere for the hot air to escape on this model and we all know where that leads!!. I went for an Irvine 82mm ali backplate spinner to finish and i'm very happy with the result. It was easy to enlarge for the big prop and balanced ok. I know its not perfectly scale but it looks good enough to me. If theres any q's please fire away....i would also like to hear any views on the interior in case i've made any school boy errors. Cheers. Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 17, 2010 Author Share Posted August 17, 2010 All up she weighs 6.77kg with 400ml of fuel on board so its no feather but i think the engine has loads of grunt so shouldn't be too much of a problem. Landing could be fun though. For a week now i've been trying to find a window in the weather to maiden her but still no luck. Wednesday is my next chance so fingers crossed. It was just a bit too windy today for my liking. Quote Link to comment Share on other sites More sharing options...
Josip Vrandecic -Mes Posted August 17, 2010 Share Posted August 17, 2010 Shuglu !!! I need to regain my breath.I'll cross my fingers for you (fingers of both hands) Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted August 17, 2010 Share Posted August 17, 2010 Thats a nice tidy job youre doing there Shuglu Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 17, 2010 Author Share Posted August 17, 2010 Cheers Timbo....it seems to have taken a long time to put together for an ARTF but having never built anything this heavy with retracts/ignition etc etc i've maybe just gone to belt and braces lengths to get things right. I don't even want to talk about the rx system switch failure i had during the final stages of the set up. It brings me out in a cold sweat to think what could have been!! Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 17, 2010 Author Share Posted August 17, 2010 Here's some pics of the cut outs in the cowl....as you can see the Zero has a "big mouth" but she only just goes in without too much chopping around. My mind tels me that i need to do some more cooling vents going by the 4 x the size of the entrance hole rule. There is a gap all the way around the rear of the cowl but its still not enough. Quote Link to comment Share on other sites More sharing options...
GONZO Posted August 17, 2010 Share Posted August 17, 2010 You may also require some baffeling in the cowl. As it is the air coming in the cowl will take the path of least resistance and go the crankcase side of the engine and not through the fins of the cylinder. A plate across the front of the cowl to block off the cranckcase half plus, maybe ,some internal plates directing the incoming air through the cylinder fins. Placing a lip in front of the exit holes causes a partial vacumn after it and helps suck out the hot air from the cowl. Like HERE . Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 17, 2010 Author Share Posted August 17, 2010 Blimey a fair list there Gonzo but i hear what you're saying and those louver vents are pretty nice. As you can see i did put an extra slot in the front of the cowl for the top of the engine to get some air. I might lengthen it though a bit. Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 18, 2010 Author Share Posted August 18, 2010 Well i flew the Zero for the first time today. I did a couple of trial taxi's and i noticed that it was already geting light on its toes so after some more preflight checks i just went for it. It only took about half the strip to get airborn and when it lifted off it pointed itself more or less straight upwards..YIKES!!!.luckily the engine has so much power that it didn't matter so i dropped the nose back down a bit and gained some height before tinkering with the trims. It took all of my available down trim to get a level flight and the dive test confirmed it was a bit tail heavy...very strange as i'd got the C of G bang on to the instructions......so i did a couple of circuits and brought her in for some slow passes to check conditions for landing etc....The tail wanted to drop as the speed bled off so it was a bit hairy coming in the first time!!. I had trouble filling it up with petrol to start with and when i had the bonnet off to install the lead i found i'd put a cable tie on the filler hose too tight....stupid boy. The rudder push rod needs some mid-length support as i can hear it clanking around when its on the ground but other than that everything seems to have gone ok.80grams of lead has now been added into the engine bay and its a lot better. Another 20grms should have it sweet i reckon. As for the engine performance...its absolutely awsome and so far hasn't missed a beat....it does burble a bit on low throttle but the response is instant and the sound is perfect above 1/3 throttle. I'm running 30.1 ratio petrol/oil mix at the moment and its still mineral oil and not sythetic. I haven't touched the factory settings on the carby jusy yet and will see how it goes for a bit before doing that. The weather's looking good for the weekend so roll on Sunday! All in all a massive. Quote Link to comment Share on other sites More sharing options...
Ultymate Posted August 18, 2010 Share Posted August 18, 2010 Shuglu here's a couple of pictures of the radial cowl and baffling on my H9 Sukhoi with a ZDZ 80 motor the baffling is made from 6mm Depron and therefore very light and just glued to the inside of the cowl with No Nails glue, runs much cooler with the baffles Quote Link to comment Share on other sites More sharing options...
Snorbitz Posted August 19, 2010 Author Share Posted August 19, 2010 I've rustled something up today out of some waffer thin ali that kind of resembles what you've done there Ultymate...when SWMBO goes to bed i might nip out to the garage and see how/if it fits. Quote Link to comment Share on other sites More sharing options...
Phil 9 Posted August 19, 2010 Share Posted August 19, 2010 SWMBO ? Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted August 19, 2010 Share Posted August 19, 2010 Same as SO Quote Link to comment Share on other sites More sharing options...
GONZO Posted August 19, 2010 Share Posted August 19, 2010 She Who Must Be Obeyed Quote Link to comment Share on other sites More sharing options...
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