FN5 Turret dimensions?

Hi all,

I’ve now completed – after 5 years – both turrets, and have made a short film on youtube – just over 15 minutes – which provides a “cook’s tour” of them, with much footage and stills and narration from both inside the cupolas, and looking in. If you’re interested, and enjoy the film please leave the usual comments/likes on youtube and/or here.

Cheers, Fidd88

https://www.youtube.com/watch?v=i3bkapxHp5M – latest film. Also check out the films “moving rams” and “new mkIII gunsight”

A fair few new films on my you-tube channel documenting the mould-making and casting of a tool to vac-form the forward and half left and right window panels. The remainder were made from flat sheet as they are simple curvatures.

These are pictures I took earlier today of the cupola with windows installed, but without the brass strapwork external to the window panels. Also pictures are a few shots of the mould-making. Simply search you-tube for “Fidd88” to find my channel.

Hi FIDD88

Indeed I have missed it, but you have a reply now!

James

Jamesinnewcastle, I’ve pm’d you, which you may have missed….

Hi Ball Turret

have sent you a PM

John

Hi atb/72   I think I have sent you a pm but not really sure ?

I would like to thank everyone who has taken the time to investigate and respond to my original post as it appears I haven’t till now, much appreciated.

Hi 12Jaguar  I could very well be interested  in the FN4 turret ring as I have the remains of a FN82 rear turret which is missing its rotation ring , the accommodation base and the cupola  and it would not surprise me if the FN4 ring is the same size .

If possible could you send a PM , many thanks 

got an FN4 but different diameter

Has any body got a spare FN5 turret ring kicking about ?

Coincidentally I’ve just measured the Stirling project FN5 turret last week. 

The fixed part of the ring that attaches to the airframe gas an external diameter of 38.25″.

I can confirm that the inner diameter of the moving part is 34.5″.

Hi Fid88

That’s right, he used my 3D model to print the parts. While the software I use is mainly for graphics, all of the animation maths is done by the software such that any size model should operate correctly. I do have  some models on here under jamesinnewcastl, sadly my old name victim of the ‘new’ improved web site!

James

That turret was designed and built by Helimadken, and was in fact the inspiration for mine. Quite amazing work in 1:10 scale.

Hi

Here’s a slightly smaller RC turret!

https://www.youtube.com/watch?v=6BaTLO-K7LU

Cheers

James

PM sent ?

Please be aware that the source drawing you have is NOT to scale, and contains many geometry errors. I know this as I had correct numerous errors on my drawings for model turrets. Unfortunately I am unable to answer your specific question accurately, as I changed the upper rotating-joint. I’ll see if I can get you an approximation in the coming days.

I’ve almost finished scratch-building a pair of FN5’s to 1:4.5 scale, and am in the process of simplifying the build to build turrets for the RC community, as the current turrets take around 2 years to build. They feature a fully working collimating gunsight with reticule and autodimmer, mechanical linkage of the sight to the elevation of the gun-cradle, and numerous lamps, also doors with working latches, and pneumatically operated gun elevation with (eventual) servo operated traverse. The intention is to mount cameras in the turrets in flight.

I did have to make a few changes to the turret, particularly the fixed/traversing ring, and the rotating joint at the top. Otherwise, they’re as accurate as I could make them given the almost complete absence of surviving technical drawings. If you search YouTube for Fidd88 you’ll find my channel documenting the builds over time and the “triumphs and disasters” during that period.

https://www.youtube.com/watch?v=fry_xO3JGTo for one film

If I can be of help with FN5 stuff let me know..

The internal diameter of the turret ring is 34 .2 inch ,from the bottom of the arch that carries the rotating service joint to the underside of the joint equals 25 7/8 inch plus 2 3/4 inch will take you to the point that you require.
I will post the actual size and thickness of the turret inner ring within the next couple of days…………..I hope this is of some help?

Can I claim ‘speling mistake’? :apologetic:

James

Absolutely 🙂

I think you meant FN5 James 🙂

Can I claim ‘speling mistake’? :apologetic:

James

I think you meant FN5 James 🙂