David Wilson 25
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Everything posted by David Wilson 25
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I thought about threaded bolts, which may yet be used, but need to get weight forward to replace the original IC .40 motor; hence the battery box through the firewall. I'll also be putting a servo per aileron; it makes perfect sense given the size and price of them when compared to 10 years ago.
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I just realised... I'm overthinking it. I want to make it electric. I need to build a motor mount box which will also carry the battery through the firewall. So just build a more offset box to restore the correct thrust angle.
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At the moment, washout is the least of my concerns... You know the adage, "measure twice, cut once" and everything similar, like reading instructions? Here's what I've managed to do... Here's what the instructions say... See the difference? I've used the LHS as the RHS and vice versa. Which means that the thrust angle is in the wrong direction. I remember looking at it after gluing and thinking about the reasons for thrust angle, getting confused as to why it was left angled. Question is... What do I do? Immediate thought was to fit a CCW prop, but that means mounting the motor offset to the left, and then the cowl is shaped wrong. The other consideration is: can I gently cut the joints and reglue? That'll be great fun! Especially since I've all this done...
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Coming from somewhere renowned for not being too flush with cash, I think I can be sparing with glue... (So I don't have to buy more!) Being absolutely ruthless in seeking weight trimming, I weighed the wheels... 88g (3.1oz). Unfortunately, that send to be the weight of similar 3.25" Robart wheels. Only possible alternative is foam wheels which could just look, well, naff?
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My assessment is that some weight could be easily saved from Template 20-3 parts D Template 21-3 parts B At a push, perhaps a few small holes along Parts D in Templates 21-3 and 22-3?
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If there's anything I've learned, it's never work off the originals if they're likely to get damaged... So, photocopies done without scaling, and I can get on with something else while glue is seeing elsewhere. In the interest of saving weight and mindful of an electric motor weighing less up front, saving weight behind the CoG is prudent. The question is, where? From the templates, there seem to be chunks of balsa used where a hole could save a little bit, without sacrificing strength...
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Finally getting back to this after several mental weeks. If nothing else, I can't fault the instructions! Perfectly clear and well illustrated; youry have to be an idiot not to be able to follow them. What I've realised tonight is that where I'd intended to place the hatch, in front of the cockpit, actually is partially under the cockpit... I'll have to rectify that. None-the-less, I've pushed on and glued a few more bits together. I think, to try and keep the weight down, I'll have to cut a hole in the firewall to move the battery as far forward as possible. Hand cutting that square will be a test of my abilities. Edited By David Wilson 25 on 03/10/2018 22:41:10
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