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New CARF P-51D Project

Old 09-27-2020, 06:58 PM
  #201  
gmorales
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Thank you for the follow-up that's extremely helpful in picking a cylinder from a dozen or so choices. After looking at the dimensions on Robart's page for their air cylinders I see that the so called "3/8" versions actually measure 1/2" on the O.D. so we may still be talking about the same one ! I think you have the model 165M

I have found a Robart that offers 1.18" of travel (I can get them quickly from Tower) and I will first try with those and by simply moving the horn very slightly inboard to allow a sufficient travel. This will be very close to your set-up and hopefully with the correct tweaks will work-out !

Thanks again,
GM
Old 09-28-2020, 04:18 PM
  #202  
Chris Nicastro
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Originally Posted by gmorales View Post
Thank you for the follow-up that's extremely helpful in picking a cylinder from a dozen or so choices. After looking at the dimensions on Robart's page for their air cylinders I see that the so called "3/8" versions actually measure 1/2" on the O.D. so we may still be talking about the same one ! I think you have the model 165M

I have found a Robart that offers 1.18" of travel (I can get them quickly from Tower) and I will first try with those and by simply moving the horn very slightly inboard to allow a sufficient travel. This will be very close to your set-up and hopefully with the correct tweaks will work-out !

Thanks again,
GM
Yep no worries, just note that I tried those and what I determined was to get the most leverage I had to put the door pivot out as far as possible, obviously, but the travel is greater. So while the shorter one will work it will also be closer to the centerline of the hinge point and less leverage than my set up. Thats the reason why I had to make the internal travel limiters for the longer cylinders. When closed the cylinder basically points vertically from the top wing skin. I have just enough clearance to the tire and wing tube so its all maxed out.

Good luck and post pics!
Old 10-06-2020, 05:26 PM
  #203  
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Recent updates from last weekend.
The Tail section is done! I installed the last two screws for the lower cover and the retaining screws for the stabs. The rudder has the LED navigation light installed with an aluminum tube, I'll blend it in better when I start to paint.






Old 10-06-2020, 05:53 PM
  #204  
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Looking good.
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Old 10-06-2020, 08:22 PM
  #205  
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Havenít kept up Chris, but youíre gonna need a ton of weight in the tail. Even with all the packs as far back as I could reach, my Kolm 155 powered mustang needed a good 3-4 pounds in the back. I filled the elevator tube with lead as well. Put everything you can as far back as you can!
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Old 10-06-2020, 08:30 PM
  #206  
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Thanks Mike!
Yeah when I had it assembled I still had stuff to add in the fuse but the impression I got was that it might be close. We’ll see! I can add the battery pack and controller for the lights to the rear still.
Old 10-07-2020, 06:33 AM
  #207  
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The sound is just amazing, guessing yours will be even better with another cylinder :-) My baffle and firewall kit was useless, had to free ball the whole thing.

Are you using rubber or hard standoffs? I would recommend the hard at the firewall. Shook the **** out of the plane at idle when I had the rubber mounts. Actually broke a brand new prop from the vibration. I kept a rubber one at the front, but went to metal in the back and it was much better.




Old 10-08-2020, 02:12 PM
  #208  
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Looks good Mike!

Something that might have helped your CG would have been the long front prop hub to set the engine back just a little further.

Yes, I went with the machined mounts now. I was going to use hard mounts and soft mounts but decided to just go with all aluminum mounts. Itís getting closer!

Old 10-08-2020, 03:59 PM
  #209  
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Motor mounts and the baffle is done.




Old 10-10-2020, 10:20 PM
  #210  
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The Cockpit

This is the part Iíve been dreading because of the cockpit kit I got and the difference in scale. If you want to build this cockpit I highly recommend getting the 1/4 scale kit or finished cockpit from wherever you want to buy it. The 1/5 scale kit parts are too small for the CARF Mustang, donít let them tell you differently. Without seeing them in person or installed in another plane you canít get an idea of what will work. I took the word of the guy from Iflytaileis and the parts are definitely too small. Now the trick is to make them work but I have to fake it by spreading them out and cheating things.
The pilot figure has to be 15 inches tall too.
The seat the kit comes with is pretty bad in person, very light but also very flimsy and poorly made. I prefer the sheet metal seat the later Mustangs had instead of the this tube frame version. Iím debating building one from sheet styrene.
Since I have a floor in my build the proportions are messed up because I built it according to my duct requirements. This is also adding to the cockpit proportion problems but actually not as much or as bad as you might think. My cockpit will end up being shorter and longer but what really hurts this is the smaller scale components.
The plan is to use sheet styrene to make the basic walls and then add layers to make it interesting. Since the canopy will not slide and only be removed when needed I donít need to make the cockpit super detailed so Iíll use the paint to create depth with shading effects.







Old 10-10-2020, 10:37 PM
  #211  
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The instrument panel is also too small and you can tell because the edge instruments are far from the side walls. The 1/4 scale panel might be on the large side but you won’t know until you try it, unfortunately. I would prefer the larger panel and make adjustments than have the smaller one swimming in the cockpit tub. Someone needs to make the right size cockpit kit for this model!

The engine is in and I had to adjust a few things like the tank and ignition positions. I had some issues with the tank interfering with the throttle linkage and the ignition switch so I rotated the tank 90 degrees and moved the ignition box back about an inch. Lots of stuff to fit between the firewall and the instrument panel.
The cowl just needs the right side exhaust now and it will be done.

Tomorrow I’m going to assemble the plane and check wires, connections and air lines. I want to start programming the radio as soon as possible.
Old 10-11-2020, 05:38 PM
  #212  
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It’s a big buggy!

Just some shots of the assembly. It’s a two man job putting this plane together for sure. I’ve done it by myself before and that’s not fun!

In the side photos you can see the gear position better and why it’s an improvement over the stock ARF.




Last edited by Chris Nicastro; 10-11-2020 at 05:40 PM.
Old 10-12-2020, 07:05 AM
  #213  
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You have done a lot of work but boy does it look good. Fyi just recently I got to see 4 P51s flying. VERY cool.
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Old 10-12-2020, 04:06 PM
  #214  
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Thanks Bob!
Where did you see 4 of these flying at once? I only know of one guy within 500 miles of me that has one, Dr Scoles. There’s a group of guys around Seattle WA that build and fly these big war birds. I’ve seen the CARF Spitfire in person finally but around me locally it’s mainly sport and IMAC pilots.

I’m looking forward to starting the engine pretty soon. Still no word from Simon on the IBS for the starter and ignition, waiting on price and availability. In the meantime I’m working on the cockpit.

This first assembly did show me its going to need tail weight so the battery pack and controller for the lights will definitely go in the tail.

Last edited by Chris Nicastro; 10-12-2020 at 04:09 PM.
Old 10-12-2020, 04:57 PM
  #215  
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Chris,
There was a scheduled event called. "the arsenal of democracy" that was supposed to fly over Wash DC. Unfortunately it was canceled due to weather.
But the day before, Thursday there was a rehearsal and I watched it. I sat at the end of the runway as the planes landers.. Awesome! The four Mustangs were escorting TWO B29's. Fifi and Doc!
Lots of great planes were scheduled to fly.. Pity that they couldn't but it happens.
FYI I saw 70+ Mustangs in Ohio at the last "Gathering of Legends".. OMG it was AMAZING!!!!
Old 10-12-2020, 08:12 PM
  #216  
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Oh full scale! Yeah that’s awesome. I got to ride shotgun in a Corsair once
Old 10-14-2020, 07:48 PM
  #217  
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The Cockpit build like many planes is a challenge because you don't have a lot of documentation plus the planes can vary from model to model, etc. I have a literal stack of magazines and books about the Mustang and you can see the variety of colors and instruments within the D model range. I bet a lot of it has to do with these planes being restored and less original but Im looking at the factory fresh looking restorations for the best representation of the cockpit. On top of that Im really just making a sport scale cockpit but as you go down this rabbit hole you learn a lot of things like zinc chromate, 3 basic colors but depending on theater and availability and wether the crew chief mixed his own the choices are just about infinite.
Finally I decided to refer to the 1/32 scale Tamiya plastic model kit manual of the Mustang because I found the best image to help me out with the basic layout and scale/proportion of the side walls of the cockpit. The magazines and books show nice images of the panels but never side on or flat, always in perspective. With this image you can scale the layout to any Mustang model you have and get it laid out quickly and easily.
To help everyone out Im posting this in case you want to tackle this cockpit project some day.


Old 10-14-2020, 07:54 PM
  #218  
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As a reference the slanted top edge is the canopy trackl and the pilots seat would be roughly between the circle on the right and data placard shown. That circle seems to be pretty centered with armor plate behind the seat.
Old 10-15-2020, 08:22 PM
  #219  
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Here are some photos of the cockpit and this Mustang has the sheet metal seat I like. Save these for future reference!













Old 10-16-2020, 04:29 AM
  #220  
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Hey Chris,

great pics... thanks for sharing them. In the first two photos, did you make the side panels or are they moulded and sold by someone?
Old 10-16-2020, 07:49 AM
  #221  
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Those are from the Tamiya 1/32 plastic model. I just wanted to show them finished but I didn’t make them. Since I have the model and the plans that’s where I’m getting the layout information. I’ll post pics of my cockpit hopefully this weekend.
Old 10-16-2020, 08:18 AM
  #222  
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I will say that after being in the pilot seat of a P-51 the cockpit is smallish.. But it fit me like a glove..
Good work Chris!
Old 10-16-2020, 01:33 PM
  #223  
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Yes they sure do mean “you strap it on” when you get in a P-51. I wish I paid for a flight a long time ago in Chino because flights now a super expensive. My Corsair flight was just the cost of fuel and that was $500 for 35min!
Old 10-16-2020, 03:54 PM
  #224  
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Some basic scaling with the cockpit kit parts I received. Iíll be using this to plan it out and make it fit. The side panels and floor are tongue and grooved so all I need to do is add plywood blocks to screw into to lock them in place. The blocks will be epoxied to the fuselage walls and easy to get to with a hex driver for a total removal of the cockpit if needed.






Old 10-16-2020, 03:57 PM
  #225  
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Well you still got to fly in a Corsair so good for that!.
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