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crazypoet

Trumpeter P-47D Razorback

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14 hours ago, TJTX said:

Wonderful stuff. I'm working on my TBM engine and came here for ideas and inspiration.   I love the way you've brought the engine to life and especially the wiring harness. 

I am coming to really appreciate the ANYZ spark plugs and braided line

its sometimes a pain to connect, but it looks gorgeous when it’s done

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Great work on the engine. I also bought some of the Anyz stuff and will use it on my Arado 234 build. For obvious reason not for the engine ;), but for the braking lines, like Rick did on his Tempest build.

Cheers Rob

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Wondering witch Eduard set you used on this. The D or C version......harv

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On 12/28/2019 at 3:12 PM, crazypoet said:

 

Now, on to stuffing all the plumbing inside and closing up the fuselage...  that will take a bit of hammering and sawing, and possibly some explosive 

 

 

Most of life’s problems are easily solved with an appropriate explosive charge. 

Stunning work so far

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Hey my friend, I’m curious which gearbox you decided to use on the engine?  I’m not hinting the longer version is more accurate for this installation.

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Greetings all - it’s been a minute since I posted, for reasons that will soon become obvious! 

Ernie - the engine is the R2800-21, with the smooth crankcase casting.  I’m building this aircraft as a D-5 RE variant, and that’s the correct motor.  The two-piece crown-style crank goes with the later C-series motor, on later editions of the P-47.

that said... I cheated a bit on the valve covers.  The correct covers for this have, for lack of a better term, “fit issues”.  So after much frustration, I switched to the flat valve covers which happen to fit and align perfectly.  As it happens, they are also all but invisible after assembly, so I took a deep breath and made the switch.  This build will be cowl-on, with the only view of the valve covers being a wee sliver from behind via open cowl flaps.  It’s an incorrect pairing, but one that I’m happy with.
 

All that said...when we last met, I’d just about finished the engine and was starting to cast a stink-eye on the internal plumbing of this beast.

then... it happened.  Engine v1.0 just would not sit right.  After much head-scratching, it hit me.  It seems that I’d managed to route the air intake lines into the wrong connections on the back side of the cylinders very early in the process, shifting everything about five degrees off.

in hindsight, I realized that I’d sided with part fit over drawing accuracy.  As-cast, the intake lines simply do not fit where they are intended - the keys that align the intake manifold with the rear bank of cylinders only fit one way.  As it happens, it fits the *wrong* way.  It requires cutting off the alignment keys to make it fit properly.  Who knew?
 

so a conundrum!  I could take the approach that another builder did (cut off the back of the engine entirely, go with closed cowl flaps and use a magnet or similar approach to connect the engine to the firewall) or I could rebuilt it correctly.

i bit the bullet and decided to build a new engine.  Which involved buying a new kit.

I’ll eventually build a second complete aircraft and find a way to correctly mount engine 1.0 after taking a hacksaw to its backside.  
 

I’ve attached front and rear views of the two engines...

Note the odd alignment on the back of the engine on the right.

I submit myself to your abuse for the asinine assumption that someone at the factory had actually test-built one of these and that the part alignment was indeed correct.  Mea culpa!

so.  Now that’s fixed, and I have a whole spare kit to do other things with!

next, on to the whole -5-RE thing.

the obviously visible differences between the -5 (that I’m building) and -20 (what’s in the kit) variants of the P-47D involve the cowl flaps and external stores. The -5 still had the older squared-off cowl flaps, and no hard points/shackles on the wings.  The wing hardware is a simple adjustment - just don’t install the bomb racks.  Life is good.

the cowl flaps were a bit of a challenge as I had to *add* material.  This involved mostly cutting a piece of card to fit, plus some sanding and filling.  That’s all now done, except for redoing the rivet holes and painting.

and I am now back to where I was at the beginning of the holidaze, ready to stuff all this into the fuselage and close it up

image.jpg

image.jpg

51911498-5482-45E7-9F48-9378E63A6F5B.jpeg

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On 1/1/2020 at 4:34 PM, harv said:

Wondering witch Eduard set you used on this. The D or C version......harv

Harv - I used the P-47D interior and exterior sets from Eduard, plus I’ll be using their gun bay set.  Beyond that, I’m using barracudacast wheels and Aber turned-brass gun barrels

i bought a set of cast metal landing gear from scale aircraft conversions, but the kit plastic actually looks better and weight shouldn’t be an issue

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I have the barrel set. I need to get the wheels. I have the Eduard external set, sending Ernie the internal set. I'll get another down the road......harv

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One think I’ve noticed in all the builds shown online is that the tailwheel strut can’t hold the weight of the model, and as a result, the strut and wheel will splay to one side.  

Now, I was going to bend one go match using piano wire, but maybe the SAC tail strut might be better than the kit part?

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I’m looking at your engine(s) and call me blind, but I don’t see an issue, although I’m not sure what to be looking for. The intake manifold is on the rear of the engine and I’m staring at the crankcase gearboxes.

I must be blind.

edit:  ok, duhhh, I never had the rear view pop up the first time I looked.  OK, I getcha now.   Now ain’t that the goofiest of issues...

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Yes yo uh are  kind. Look at what port the exhaust pipes come out of

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9 minutes ago, Clunkmeister said:

One think I’ve noticed in all the builds shown online is that the tailwheel strut can’t hold the weight of the model, and as a result, the strut and wheel will splay to one side.  

Now, I was going to bend one go match using piano wire, but maybe the SAC tail strut might be better than the kit part?

For the tail wheel you may be right.  The main gear seems pretty substantive.  When I get to that point I’ll clean up the metal gear - the castings are pretty rough - and see which works best

 

thanks for the feedback on the tail!

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I have a bending jig as well, so I was going to attempt bending music wire and drilling through the mount...

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7 minutes ago, Clunkmeister said:

I’m looking at your engine(s) and call me blind, but I don’t see an issue, although I’m not sure what to be looking for. The intake manifold is on the rear of the engine and I’m staring at the crankcase gearboxes.

I must be blind.

I went in through the out door on the first engine - I plugged the intakes into the exhaust ports.

 

if I’d paid closer attention I’d have realized that - despite everything still sort of fitting, the whole back of the engine was twisted slightly to the left.  The exhaust and collector ring still - oddly fits, even in the wrong ports, but it screws up all the connections to the firewall 

 

doh!

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Just now, crazypoet said:

I went in through the out door on the first engine - I plugged the intakes into the exhaust ports.

 

if I’d paid closer attention I’d have realized that - despite everything still sort of fitting, the whole back of the engine was twisted slightly to the left.  The exhaust and collector ring still - oddly fits, even in the wrong ports, but it screws up all the connections to the firewall 

 

doh!

Yep. I never had the rear view come through right away.  That’s the goofiest of issues I’ve ever seen.

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What tricked me was the everything fit perfectly when assembled incorrectly 

until I went to connect the firewall and nothing lined up

even when I did v2, it took me finally having to shave off the alignment tabs and use a bit of force to make it fit correctly 

just bad engineering from Trumpeter

 

but it got me a second kit to

play with, so it was kinda worth it

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With the engine finally done, I dusted off the cockpit and crammed all the plumbing (well, actually *some* of the plumbing - only that which was visible, necessary for fit or both) into the left side of the fuse, took a deep breath and closed the door

its pretty much a one-shot thing, since the wing spars are a very snug fit and don’t like to pull back out.

(sounds like me as a teenager, come to think on it)

so everything fit, with the exception of one slightly stubborn gap in the belly, which will resolve with some judicious pressure and virulent chemicals.

i haven’t glued the sides yet, But this thing is finally starting to look like an airplane 

 

 

E54A2680-E41D-46DC-BFCD-CA362EA1537A.jpeg

105708D4-A7EE-40F9-92D5-1FDBF4954AF1.jpeg

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5 hours ago, crazypoet said:

its pretty much a one-shot thing, since the wing spars are a very snug fit and don’t like to pull back out.

(sounds like me as a teenager, come to think on it)

 

Bit of oversharing there me thinks! :wacko:

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