Lockheed Electra Model 10
Hello folks,
I have been toying with the idea of buiding a Lockheed Electra Model 10, firstly because Smilo suggested building one after I finished practising a bit of AD2K with the two tutorials under his guidance, and secondly, because it would be a good extra opportunity to use Ivanīs interesting new 2-pitch propeller, for a Lockheed Electra Model 10A.
It could also be a good opportunity to build a detailed, fully animated model with AD2K, but only if the "manual Z buffer" sequencing technique could be undertaken by Smilo, as I feel quite incapable of doing something so complicated by myself.
The other possiblility would be to supply a not-so-animated AF99 model, but built as cleanly as possible using building techniques to the best of my knowledge that I have learnt from Ivan, with a SCASMed virtual cockpit, which wouldnīt be bad alternative at all!
So, this project could start with the Lockheed Electra Model 10A as a basis, and then also provide a Model 10E, the one flown by the famous Amelia Earhart. This one had more powerful engines and CV propellers and long range tanks.
The Model 10A was powered by 2 P&W R-985 Wasp Junior SB engines with single-speed superchargers, providing a maximum of 450 Hp at 2300 RPPM for take-off, and giving 400 hp at 2200 RPM upto critical altitude of 5000 ft. Apart from the restly already known but scarce performance specs, I have found an interesting historical article from a flight magazine that quotes a few additional performance details.
Now we know the following:
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> Take-off power: 450 Hp at 2300 RPM.
> Lea Level Max Speed: 202 mph.
> Max Speed: 215 mph at 8000 ft.
> Continuous power upto 5000 ft: 400 Hp at 2200 RPM
> General cruise speed: 190 mph
> Cruise speed at 5000 ft: 190 mph at 2000 RPM.
> Max RoC of 1350 fpm (I havenīt tested this yet).
Making the necessary adjustments to the flight modelīs engine and airframe parameters, I have arrived at the following results, which are not perfect yet, but would be quite usable, I suppose. Increasing performance a bit for 500 ft, as it isnīt really S.L., would give a bit more at 8000 Ft, at the price of a slight unwanted peak at 5000, because at the moment, 8000 ft performance really happens too soon at 5000 ft...
Maximum speeds:
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_500 ft: 202.0 mph, 450 hp, 2296 RPM
5000 ft: 214.0 mph, 471 hp, 2436 RPM
8000 ft: 207.8 mph, 424 hp, 2412 RPM
Cruise speeds:
_500 ft: 190.9 mph, 399 hp, 2198 RPM, 93% throttle
5000 ft: 190.8 mph, 377 hp, 2410 RPM, 86% throttle
8000 ft: 190.0 mph, 364 hp, 2277 RPM, 85% throttle
Hello Ivan,
I know you are very busy indeed in your paint shop, with the textures on your Ki-61.
Consequently I donīt expect an answer or any comments on these performances, at least not for the moment.
There is time enough for that in the future, if you feel so inclined, so please donīt feel obliged to do so.
Cheers,
Aleatorylamp
Max. MAP 34.5" - performance closer.
Hello All:
I just came across another gem of information on the performance of the Electra, namely a performance/consumption table stating that a maximum manifold pressure of 34.5 inches of mercury was maintained upto critical altitude. I had had it a little higher from the Condorīs engines, for want of more exact information.
So, correcting that and increasing Boost Gain ever so slightly, and also compensating the S.L./500 ft power difference, I got it a bit nearer to the specified 215 mph at 8000 ft without getting excessively fast at 5000.
Now it is just 3 mph fast at 500 ft, and just 2 mph slow at 8000 ft, but these differences are probably negligible.
Max. Speeds:
_500 ft: 205.4 mph, 452 hp, 2307 RPM
5000 ft: 215 mph, 462 hp, 2426 RPM
8000 ft: 213 mph, 436 hp, 2444 RPM
Cruise Speeds:
_500 ft: 190.6 mph, 390 hp, 2198 RPM, 92% throttle
5000 ft: 190.1 mph, 362 hp, 2218 RPM, 84% throttle
8000 ft: 189.7 mph, 351 hp, 2253 RPM, 80% throttle
For the time being it seems as close as I can get!
Maybe Iīll start building the model at the weekend. My fingers are already itching.
I still have to decide with what, though... AF99 or AD2K, that is the question!
Cheers,
Aleatorylamp
Then with AD2K shall it be!!
Hello Smilo!
The band is playing tonight, that will be great fun!
The problem is not really actually building with AD2k, but the sequencing, and this will have to be done even if I build with AF99 first - even in sections, as you conveniently suggested.
The AD2K building style itself, with the bulkheads and facilities offered in AD2k, will be in fact much easier and is quite attractive, so if you are still game to give me a hand with the sequencing, then Iīll be very pleased indeed to build the Electra with AD2K!
So, this will be great fun too!
...and I wish you luck reviving the required old hardware!
Incidentally, have you tried Virtual Machine Player to install WinXP onto a Windows 8.1 computer? It has worked for me, and I can build and test models there, although Hardware Accelleration for the graphics card wonīt work, but so what! Then I transport the model via USB-stick over to the normal computer with the normal CFS installation.
Cheers,
Aleatorylamp
3 Attachment(s)
The mid-fuselage: AD2Kīs Shaping Art!
Hello Smilo, hello all!
So... hereīs the first fuselage section of the new Lockheed Electra Model 10, going from the leading edge to the trailing edge.
It took two tries to get the fuselage bulkhead template shapes right. I found itīs best to define a main one (at 0,0,0, for example) in "Template-New Class", with its number of points, position and size, and then shape the cross-section in the "Edit Template" Option.
After that, successively copy the bulkheads into subsequent positions fore and aft of the main one, re-sizing each one in height and width, and positioning correctly, without altering shape each time to avoid deformations. Corrections in width, after automatic width calculations after height changes, will of course be necessary.
Then, cover each additional section with panels with the "cover template" option, being careful to have the correct templates selected in the corresponding windows! Beware: Any editing of a bulkheadīs shape after this is possible, but may cause severe shape problems!
On the screenshots, the front is on the right, and would be the forward part of the passenger cabin, and where the flight deck would start.
I think Iīll add the wing roots to it and have that as the central assembly for now.
Cheers,
Aleatorylamp