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About sovereignhobbies

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  • Birthday 03/09/1981

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  1. For those who may be interested, you can now be automatically notified as soon as these are in stock: https://www.sovereignhobbies.co.uk/collections/sovereign-hobbies/products/sovereign-hobbies-bristol-beaufighter-tf-x-late-tailplane-conversion-1-48-for-tamiya?variant=28474623262804
  2. I held off on finishing this for a while to see if the Revell kit was any good. I've seen one now, and will be sticking with my Tamiya kits having compared them to the Avieology drawings. Still, it may reduce the interest in these so I'm going to begin with a batch of 30 sets and see how they go. This is a direct fit replacement tailplane and elevator set for the Tamiya 1/48 Bristol Beaufighter TF.X (Kit no. 61067). Simply replace the kit parts with these and you're done. These represent the Mod. T361 late tailplanes and elevators with enlarged balance which was achieved by extending the leading edge of the elevators forward to the tailplane spar inboard of the outer hinges. Comparison with the kit parts will reveal reprofiled tips with a tighter curve towards the leading edge loosening towards the trailing edge - the kit parts are oval shaped. Furthermore, comparison will reveal that these new "enlarged" elevators are infact smaller than the Tamiya kit parts. The reason for that is because Tamiya appears to have measured the RAF Museum's late Beaufighter and used its elevator chord, then added aerodynamic balance horns again outboard of the hinges - this is incorrect and results in elevators much too large for any Beaufighter. They are supplied as separate tailplanes and elevators, but are cast with the servo tabs in the "up" position. The servo tabs, unlike the trim tabs, are not controllable by the pilot but rather are mechanically linked to the tailplane and move in the opposite direction to the elevators. They are, in effect, an elevator for the elevator and their purpose is to aerodynamically lighten the controls to reduce physical effort required of the pilot. When the aircraft is parked in the ground and the elevators allowed to droop, the servo tabs will mirror this. I expect these will be available on our webstore in approximately 6 weeks time.
  3. Just a little at a time on this one Darren - I'd definitely burn out on a project like this making it my sole activity!
  4. I have made a start "upstairs" in the cockpit. The quilted cockpit interior walls needed rolled and stretched first
  5. Our Bismarck Final Sortie Colourset is one of our most popular, but also one of the first we made well before we had even the first clue how to draw simple graphics for illustrations. I'd been dreading doing it, but once I got in to it I decided to be clever with the Layers in the drawing to allow me to show all the iterations worn in the last weeks of Bismarck's very short career.
  6. I think I've just about brought this thing to heel and haven't yet had to do anything I didn't want to do. In addition, I haven't yet installed any of the mass in the engine nacelles. There is space ahead of the CofG for almost as much lead shot again in the crew tunnel as is already in there. The tailplanes, elevators, fin and rudder have had a whole heap for plastic shaved out from inside - and they're still very substantial and feel as rigid as they ever did (there's just less risk of punching a hole in a concrete floor if I drop it tail-first now!). I've also managed to get a lot more lead right up front by using tiny balls of lead. I found a small 2.5kg bottle of the stuff in my boxes of r/c stuff that has been neglected since I moved house 5 years ago. This weighing is far from accurate because with all that lead in the nose it no longer sits happily on the fulcrum at the intended CofG. Now it tries to slide off and as it's nudged forwards or back it swings from going nose up to nose down. In otherwords, it's more or less there and some mass at the engines should see it right: It won't lie still now: Tailplanes - much thinner, still thicker than most kit parts I filled the upper forward turret tub thing with lead: No ballast has been placed in the bomb bay yet (only inside the tunnel) There was a lot of space to fill with lead still - it's just that cuboid shaped iron weights were inefficient at using curved spaces - the cockpit floor piece now weighs 164g alone:
  7. Hi Steve, I haven't but it looks very useful - I'll get some ordered, and thank you! Some Alclad aluminium has been sprayed in the nose wheel bay ...which will next receive some subtle oil washes just to pick out the details and add some variation.
  8. I've been an idiot. I tried the nose weights in place and re-weighed the tail, then used the new residual weight on the tail for the moment and took credit for the nose-weights already in there again. I've had to re-do that. I might be able to get a bit more in at Position A2 above using lead shot instead of wheel balance weights. That will require me finding my bottle of the stuff in the big shed outside.
  9. I'm maybe not a million miles away unless I have my sums wrong... Hopefully this is now fairly self-explanatory
  10. This will be an absolute last resort, but for reasons I can't articulate it will feel like it undermines all my efforts on detailing the cockpit.
  11. It would need motorised propellers and a crew for that Dear Col, plus a tripod of a stand liberated from someone's funcy DSLR camera setup
  12. Some more thoughts on weights... Unlike most I have straddled many camps within a wide world of model making and there are things that the well-seasoned modeller of one camp takes for granted as common sense that seldom occur to well-seasoned modellers in other camps. One of the things I've done before is design, build and fly radio controlled aeroplanes. Like real ones, they have to balance or they don't fly. Every pilot/builder of flying models knows that the correct way to balance a model is to lighten the tail, not fill the front end with lead. Doing the latter results in the total weight going through the roof, the power to weight ratio dropping and the wing loading increasing. The somewhat dimmer aeromodeller tried to offset bad building by fitting bigger engines, but that does nothing to help the high wing loading and high stall (and therefore takeoff and landing) speeds. To arm myself with some data (me coming back to my Engineering roots here) I have inspected the rear fuselage and tail parts from the kit. These are very substantial mouldings and must be close to 2mm thick everywhere. Ignoring the wings for now, I taped the fuselage halves and tailplanes & elevators together and balanced the fuselage on the point where the main wheels coincide. The tailplanes have relatively massive locating tongues which overlap inside the fuselage. Even like this with interior parts missing and no wings, the tail is weighing over 90 grams on the scales: So why am I making such a fuss about the thickness of plastic back there? Because Engineering, that's why... Here are the moments about the Centre of Gravity (which needs to be at or ahead of the main wheels for this thing not to sit on its tail striker) The scale of the drawing is irrelevant because the moment arms only need to be in proportion with each other, not true to life - the results are the same regardless of the scale. The moment about the CoG at the tail (which I have labelled T and which is where most of the excess beef in the tail planes, elevators, fin and rudder are - there is more redundant weight ahead and behind) is the the mass on the scales times the distance from the CoG. The mass needed either immediately behind the cockpit (which I really don't want to do) to balance this out with only half the leverage (48mm ahead of the wheels) is as near-as-damn-it double, or 179g which needs to be considered an underestimate because paint, guns, some PE in the aft compartment etc is going to tip this a little further aft. Point B above the front lower turret is worse still needing 210g placed there to offset the tail's moment. The moral of the story is that for every 1 gram of redundant mass I can Dremel out of the back end of this thing, I save the need for an absolute minimum of 2 grams of counter balance up front which means the finished model is 3 grams lighter than it would have been had I left the tail as-is. If I am to have any chance of getting this thing to sit on its nose wheel without spoiling the interior I have to do this, and the main undercarriage will thank me later when I do. With the nose weight already stuck to the cockpit floor inserted into the fuselage, the same experiment on the scales still shows a residual weight of 60 grams on the tail.
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