Official FMS 1500mm P-47D Razorback Thread

[Elbee]

You know you are among friends. Best, LB

[f4u ausie]

Hope U guys don't mind me butting in.... But what Yas r doing on one small part of an aicraft. Is awesome.. reminds me of my 80s schooling
an Ozzy 40 thou. Around 1 mm.. shows the accuracy Yas ar working with... Very cool
... My brother and I spoke of. D day.. we always remember those young men.. especially that black and white footage of Omaha. That's well seen.. hope not outa line their cya

[davegee]

Thanks, Dave, for measuring. Also, do you know the thickness of Elbee's back plate? I can cut that amount off the base end so the length will be the same. I'm planning on using .020-.030" styrene sheet for my back plate on the alum. spinner. Not any load bearing structure so I think this will do.
Best Regards, Rex

Hi Rex: I just measured the back plate for the spinner from one of Elbee's CE prop domes. It is about .040" thick (including some layers of primer.) So, if you could make the back plate .030" thick, that should work great.

Thanks!

davegee

[jetfool]

Thanks, Dave, for measuring. Also, do you know the thickness of Elbee's back plate? I can cut that amount off the base end so the length will be the same. I'm planning on using .020-.030" styrene sheet for my back plate on the alum. spinner. Not any load bearing structure so I think this will do.
Best Regards, Rex

[davegee]

Davegee,
I was thinking of D-Day last night while working on the spinner. My Dad had friends that landed on D-Day and I can remember stories they told as a child. Many sacrificed everything for our freedoms today.
The spinner in the pictures are of your spinner. I will drill the 4 holes in the base. Do you know the hole dia. that Elbee used on his spinners? The little safety wired bolts you will have to add. If you know the dia. of them I can drill them also.
Your Penrod and Sam looks great. I need to finish my cockpit and make an open canopy. This winter I want to add the better scale cockpit and P&W Eng. Not enough hours in the day!
Best Regards, Rex

Hi Rex: sounds great.We’ll wring ‘er out with your prop spinner when I get it.

Regarding your question on the hole diameter of the four small holes near the bottom of the printed CE domes, I come up with just under 5/64" diameter when I tried to put a drill bit through the holes. So something in that area would work fine, I would think.

cheers

davegee

[davegee]

Hi Elbee and Rex: I remember seeing the premier of The Longest Day movie on or near June 6, 1962, in Aurora Colorado at the East 70 drive in theatre. Besides the fun of going to the drive-in, the movie, seen with my two older sisters and my mom, was just a memorable experience that I crisply remember to this day.

Around 2005 or so, I had a new captain student on a trip where he got his initial operating experience on the 747-400 that he had just completed his ground and simulator training. During our 6-day trip, we got on the subject of the Band of Brothers mini series. Turns out, his dad was in the 101st A/B, 501st Parachute Infantry Regiment that dropped into Normandy in the early morning hours of June 6. The parachute drop stripped him of all his equipment, except for a little hatchet he had strapped to his leg. He splashed down in a flooded field that startled a couple of German soldiers who looked for him but didn’t find him. He made his way to his objective and was awarded the Distinguished Service Cross, second only to the MOH. His service followed the BoB miniseries, ending at Berchtesgaden, Germany when the war ended on May 8, 1945. I had the distinct honor and privilege of meeting and talking with him at his home for three hours one day. He has since passed away, but I will never forget him. His name was Donald E. Zahn, a true American patriot.

Davegee

[jetfool]

Davegee,
I was thinking of D-Day last night while working on the spinner. My Dad had friends that landed on D-Day and I can remember stories they told as a child. Many sacrificed everything for our freedoms today.
The spinner in the pictures are of your spinner. I will drill the 4 holes in the base. Do you know the hole dia. that Elbee used on his spinners? The little safety wired bolts you will have to add. If you know the dia. of them I can drill them also.
Your Penrod and Sam looks great. I need to finish my cockpit and make an open canopy. This winter I want to add the better scale cockpit and P&W Eng. Not enough hours in the day!
Best Regards, Rex

[Elbee]

davegee

Thank you so much for remembering 6/6/44.

I had forgotten, sadly for me.

I do remember seeing the film "The Longest Day" at the Orpheum Theater with my Dad.

I didn't quite understand it all, I was 9 at the time, but it is a great childhood memory.

Thanks Dave, what would we do without you.

Best, LB

[davegee]

Elbee,
Yours is the spinner that should be used probably but the shiny alum. looks nice. I think I can get this below 1.5oz which should be able to balance ok.
The thing I like about the 3d printed version is after you get the final version everyone after is identical and the detail is amazing. I think painted with Alum. paint and polished it will look like alum.
Best Regards, Rex

Elbee and Rex: great jobs by both of you! I have been beta testing Elbee's V2 3D printed CE prop dome, and with several flights on it now with two different airplanes, it withstands the rigors of vibration, speed, and other stresses with aplomb. It screws on by finger torquing it for the proper alignment of the base plate with the prop hub behind it (see above photo of the real one and how it aligns.)

I'll attach a few pics I took this morning using my Penrod and Sam FMS P-47 as my testbed. The prop dome is in primer coat, and as soon as I get the paints I need from Amazon, I'll start working on making it mirror smooth and shiny.

It's not lost on me and probably many of you that tomorrow is the 81st anniversary of D Day, and I think the real Penrod and Sam probably participated in sorties that day, although the famous pilot who flew the real plane (Robert S. Johnson) and got two kills before he was sent home with 27 kills was not there that day.

Rex, I'll be standing by for your aluminum prototype when you complete it to do beta testing on my airplanes. It's looking great, so far!

Cheers

Davegee

[jetfool]

Elbee,
Yours is the spinner that should be used probably but the shiny alum. looks nice. I think I can get this below 1.5oz which should be able to balance ok.
The thing I like about the 3d printed version is after you get the final version everyone after is identical and the detail is amazing. I think painted with Alum. paint and polished it will look like alum.
Best Regards, Rex

[Elbee]

jetfool

As a comparison only, as there is NO substitute for horsepower or spun aluminum prop hubs, the 3DP plastic hub comes in at 0.60 ounces without primer/paint.

It is a non-structural part and the walls could be thinned, but as you wrote, the FMS P-47 can handle it.

For the record, there is no doubt that a scale hub spun from aluminum is the real deal IMHO.

Nicely done, Rex.

Best, LB

[jetfool]

Working on the alum. spinner. Tip profile is not final yet but the 2pc assembly now weighs 1.95oz. Should be able to reduce this after final shaping. My first version weighed 4.3oz. so I'm going in the right direction. I think the P-47 will handle the weight. Davegee will be the beta tester on his model. He has a lot of experience with the P-47 and can give me his opinion. Elbee is 3d designing the same spinner and will be a lot lighter, but the polished alum really looks nice on my P-47. A picture or two
Almost midnight so time for bed, Rex

[Elbee]

davegee

Made a change in the prop hub detail.

So call this a version mod.

I resent it via your email as the STL file is now too large to post here.

Best, LB

[jetfool]

Looks like your weather is headed our way Wednesday. Tired of the wind and rain

[davegee]

Dave,

I added some detail to the Curtis Prop Hub.

The thing is alignment.

It is totally dependent upon the M10 threaded shaft how that will line up when threaded into place.

Without the motor's threaded shaft, it is a wild guess.

In any event, here's the STL. [ATTACH]n426764[/ATTACH]

Best, Steve

Most Excellent,, LB!! That will save me a lot of time and effort for printing out these CE Prop Domes with the additional scale details.. Much appreciated!!! I'll post a pic of the finished V2 when I get this printed. I've ordered paints on Amazon and should be able to have a finished ready to fly part within a couple of weeks. I plan on test flying one of my P-47s with the V1 prop dome tomorrow morning, weather permitting. Today was scratched due to cold, cloudy and windy weather.

Best,

Davegee

[Elbee]

jetfool

There's a bit of truth in that.

I've always wanted to build a better retract for every scale model I've ever built.

Bit of a Dreamer I suppose, though I used to turn a few parts for my R/C racing cars back in the days of yore.

I buddy loaned me his 14 inch mini lathe as long as made him the same parts I was making.

"Not enough hours in the day without pay." as my Gran-Dad used to say.

Glad the prop hub is working out, it's been a great exercise in design.

Much like a decent pilot, wheels/tires and retracts, it is one part on model scale aircraft that seems to always be an OEM shortcut.

I'll have a Phantom update for you soon.

Best, LB

[jetfool]

Elbee,
You are a master of 3D design and have a Heart of Gold for doing this for us. Outstanding work.
I chucked my spinner in the lathe a hand threaded the tap. Came out true to the motor threads and seated against the prop hub perfect. You need to purchase a lathe, you would never leave your shop then. LOL
Best Regards, Rex

[Elbee]

Thanks, Rex. Copy that you will work out printed spinners with Elbee. Good luck entering your F-4 next year!

Cheers

Davegee

Dave,

I added some detail to the Curtis Prop Hub.

The thing is alignment.

It is totally dependent upon the M10 threaded shaft how that will line up when threaded into place.

Without the motor's threaded shaft, it is a wild guess.

In any event, here's the STL. [ATTACH]n426764[/ATTACH]

Best, Steve

[davegee]

Davegee,
I made the flat plate years ago for my yellow P-47. I will look in my notes and find the photo's, 3- view. Simple to make.
Best Regards, Rex

Thanks, Rex. Copy that you will work out printed spinners with Elbee. Good luck entering your F-4 next year!

Cheers

Davegee

[jetfool]

Davegee,
I made the flat plate years ago for my yellow P-47. I will look in my notes and find the photo's, 3- view. Simple to make.
Best Regards, Rex