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Building a Roden 1:32 PT-17 The Hard Way (Update: 03 Jan 21)

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  • Member since
    May 2016
  • From: Rapid city SD
Building a Roden 1:32 PT-17 The Hard Way (Update: 03 Jan 21)
Posted by B-1 CrewCheif on Monday, December 28, 2020 10:25 PM

For the longest time since ive gotten into scale modeling 10+ I have been telling friends i cant believe they havent made a Boeing Stearman in 1:32 scale. So i was very delighted when i found out that both ICM and Roden had announced they were releasing PT-17's this year in 1:32 Scale. I ended up picking up the Roden kit as it was the first one i found at the local hobby store. Upon opening the box i was impressed with the details... until i looked at the engine... The cylinder detail was absolutly atrocious.

And so this is where my journey begins. Initially i thought all i would need to do is just replace the cylinders as the engine core was pretty sound. But after more thought i found it would just be easier to remake the whole engine. 

After trying to see if there anyone who could print a new engine for me if i provided the file i eventually decided to pull the trigger on a 3D printer for myself, and ended up getting the Phrozen Sonic Mini 4K which was perfect. I spent months trying to design a new engine but unfortunatly kept running into trouble when it came to designing the cylinders. Thankfully someone in The Scale Modelers Critique group on Facebook had set of files from a R-670 he had designed up for 3D printing.

After getting the engine parts printed i got to work on painting and details. I started with the basic painting. After basic painting was done i moved onto the small details. I used .030 lead wire for the pushrods, and then .015 lead wire for the oil sump lines. Next came adding ignition wires. I started by placing .015 lead wires into each spark plug hole on the rear of the engine. But next came the hard part. 

There is a guide tube behind the #1, 2, and 7 cylinders that attaches to the intake pipes that all the ignition wires initially go into. The files for the engine i got did not come with this. What i ended up doing was scratch building it out of 12 Ga. aluminum wire. Once this was finally attached i could finish up the ignition wires and place them in the correct positions on the guide tube.

Tags: 3D , 3D print , 670 , boeing , Build , engine , Kadet , Print , PT17 , PT-17 , r , R670 , R-670 , scratch , Stearman , WWII

On the Bench: 1:32 Roden Stearman, 1:35 Orochi M3A3 Bradley, 1:6 Mandalorian figure

  • Member since
    April 2003
  • From: USA
Posted by keavdog on Monday, December 28, 2020 10:55 PM

That looks great!  Time well spent given no cowl.  I take it you like the printer?

Thanks,

John

  • Member since
    May 2016
  • From: Rapid city SD
Posted by B-1 CrewCheif on Tuesday, December 29, 2020 1:45 AM

keavdog

That looks great!  Time well spent given no cowl.  I take it you like the printer?

 

 

Yes i love the printer. Very impressive what it is capable of.

On the Bench: 1:32 Roden Stearman, 1:35 Orochi M3A3 Bradley, 1:6 Mandalorian figure

  • Member since
    March 2005
Posted by philo426 on Tuesday, December 29, 2020 8:29 AM

Quite impressive perhaps you can sell.a basic engine correction set!

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Tuesday, December 29, 2020 8:49 AM

I sure will be following this thread.  I will be ordering this kit next week.

I have a found place in my heart for the Stearman.  The PT-17 is the second plane I ever had rides in. My dad was in the CAP in the forties, and though I was too young to be a cadet, the squadron kind of considered my a mascot. I was seven years old.  Dad was able to take me for  rides in it often, and let me handle the controls a few times.

 

Don Stauffer in Minnesota

  • Member since
    January 2009
  • From: hamburg michigan
Posted by fermis on Tuesday, December 29, 2020 7:27 PM

 Beautiful engine!

I would be interested in purchasing one...if that's an option?!

I had a little "stick time" in a Stearman. Actaully, it was the first thing I flew that wasn't a Cessna! Sadly, the pilot/owner had a fatal accident at Osh Kosk in his Fouga Magister('02, IIRC). I did a model of his Magister, and it's in the lobby, here at the airport we're based at. I'd like to do his Stearman as well. In 1/32, it's big enough to be impressive, but still just small enough to fit the display case at the airport.

  • Member since
    May 2016
  • From: Rapid city SD
Posted by B-1 CrewCheif on Wednesday, December 30, 2020 12:45 AM

philo426

Quite impressive perhaps you can sell.a basic engine correction set!

 

That could be possible. Ill have to get in touch with the original designer first to make sure hes ok with it.

On the Bench: 1:32 Roden Stearman, 1:35 Orochi M3A3 Bradley, 1:6 Mandalorian figure

  • Member since
    May 2016
  • From: Rapid city SD
Posted by B-1 CrewCheif on Wednesday, December 30, 2020 12:48 AM

fermis

 Beautiful engine!

I would be interested in purchasing one...if that's an option?!

I had a little "stick time" in a Stearman. Actaully, it was the first thing I flew that wasn't a Cessna! Sadly, the pilot/owner had a fatal accident at Osh Kosk in his Fouga Magister('02, IIRC). I did a model of his Magister, and it's in the lobby, here at the airport we're based at. I'd like to do his Stearman as well. In 1/32, it's big enough to be impressive, but still just small enough to fit the display case at the airport.

 

I will surely let you know if i start printing and selling them.

 

And 1:32 is a perfect scale for the Stearman. I built the Revell 1:48 one but that thing was just too tiny.

Tragic to hear about what happened to that pilot btw. I hope his Stearman either stayed with the family or went to a good home.

On the Bench: 1:32 Roden Stearman, 1:35 Orochi M3A3 Bradley, 1:6 Mandalorian figure

  • Member since
    May 2016
  • From: Rapid city SD
Posted by B-1 CrewCheif on Wednesday, December 30, 2020 12:52 AM

Don Stauffer

I sure will be following this thread.  I will be ordering this kit next week.

I have a found place in my heart for the Stearman.  The PT-17 is the second plane I ever had rides in. My dad was in the CAP in the forties, and though I was too young to be a cadet, the squadron kind of considered my a mascot. I was seven years old.  Dad was able to take me for  rides in it often, and let me handle the controls a few times.

 

 

Thank you very much for the follow. Look forward to reading your comments.

 

I was almost able to get a ride in one. An older gentelman used to fly his Stearman from the neighboring town to my local airport all the time. And when i joined the EAA young eagles he was one of the planes giving rides but unfortunatley i did not draw his name. Hoping he still has the aircraft and ill get a chance to fly in it when i go home again as i became friends with him since i joined his EAA chapter.

On the Bench: 1:32 Roden Stearman, 1:35 Orochi M3A3 Bradley, 1:6 Mandalorian figure

  • Member since
    May 2016
  • From: Rapid city SD
Posted by B-1 CrewCheif on Friday, January 1, 2021 7:21 PM

Hello everyone! Happy New Year!

 

Some more progress on the Stearman over the last few days. 

Engine is just about finihsed now. I decided to add a bit more detail and install the external primer. Behind the #1 intake tube their is a external primer with fuel lines that go to the #1, 2, 6, and 7 cylinders. The fuel lines come off the primer and wrap around the cylinders to the front. 

Im not sure what size wire i used as it wasnt labled. I got it from a fishing store and all i know is it is VERY tiny. 

After the plumbing for the external priming was done i finished up by installing the oil sump lines that connect between the #3, 4, 5,and 6 cylinders. I used .025 lead wire for this and then wrapped the ends with aluminum tape to simulate the rubber connections.

Lastly the exhaust was painted and installed. I had to drill out the end of the exhaust sand down the inner ring that connects to the kit. I painted the exhaust with Alcalad Steel but i feel like its too dark so it will probably change later on before its installed.

Finally once the engine was done i started working on the interior. The interior actually looks really good. I did some basic painting and got it all assembled. But as the title says, im building this the hard way so im not done yet. More to come!

On the Bench: 1:32 Roden Stearman, 1:35 Orochi M3A3 Bradley, 1:6 Mandalorian figure

  • Member since
    May 2016
  • From: Rapid city SD
Posted by B-1 CrewCheif on Sunday, January 3, 2021 1:35 AM

Short bench session tonight. 

Did some heavy chipping in the cockpit. These aircrafrt were used by both Navy and Army and probably trained every pilot that ever flew so i believe these aircraft would weather pretty heavily. Combination of both micro chipping and sponge chipping methods were used to achieve this. 

Another thing i did was in order to make final assembly a little easier, i added channels at the front leading to the placment holes for the cockpit. This way i can glue the 2 fuselage halves together and get everything straight before the cockpit is added and once everything is straight i can just slide the cockpit sub assembly into the fuselage. 

More to come, stay tuned!

On the Bench: 1:32 Roden Stearman, 1:35 Orochi M3A3 Bradley, 1:6 Mandalorian figure

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