Dr 1 triplane fusealge tube size

pvk308 · 31 December 2017, 03:06 PM

Hi guys after a very exhaustive search I am wondering what size tube was used in the construction of the Dr 1 fuselage. One site I have found states 20mm in 1/1 scale. Now scaled down to 1/8 its 2.5mm....... My concern is a lot of the kits I see in 1/8 are bigger ie 3mm tube in 1/8 which makes the tube size 28mm in 1/1. Does any one have the correct size or diameter tubing for the fuselage in 1/1 and please correct me were there two sizes or diameters of tubing used in the frame

'14-'18aviationcollector · 4 January 2018, 12:09 AM

Hi pvk308,

There are members here who have much better knowledge about the steel tube sizes used on the Fokker triplane than my knowledge. There are many different sizes of tube used on the Fokker triplane, and other Fokker designs too, of course. I think the main sizes of steel tube used for the Fokker triplane are 16mm, 14mm and 12mm, or possibly 14mm, 12mm, and 10mm. They telescope of course, and the smaller tubes are used at the tail end of the fuselage.

I wish I could be of more assistance, but I'm sure that someone will see your question, and add to my reply.

All the best of wishes for the New Year,

David.

pvk308 · 4 January 2018, 12:26 AM

Thanks for the reply 14-18 mate appreciated and yes it is looking like you are correct. I have been measuring my plans and so far have come up with about 5 different sizes all of which are bigger than some the one figure I have found....... it still leaves me to question the size through out the fuselage though

'14-'18aviationcollector · 4 January 2018, 01:00 AM

No problem mate!

I wish I could help more, but if it's for model work, the sizes I mentioned will be close. I'm sure that sooner or later, someone who knows a lot more about Fokker steel tube sizes will reply. 28 mm is a lot more like the size used for the undercarriage components. The undercarriage legs are, of course rolled into a streamlined shape, and the axle, at least for Albatros aeroplanes is slightly larger than the 28 mm you mentioned - 32 mm x 3 mm if my memory serves me correctly. I'm sure that Fokker axle tubes would be a very similar size, if not the same size. Have you seen Jeff Brook's thread? He is building a Fokker D.VII, but still, the Fokker Dr.1 is probably mentioned in his thread, since the two were more closely related than you might think. There should be plenty of information relating specifically to the Fokker Dr.1 if you search the Forum.

pvk308 · 4 January 2018, 01:14 AM

Will have a look for his thread thanks mate. A lot of the measurements I have are close but I just wont to be certain with the numbers from an original example

'14-'18aviationcollector · 4 January 2018, 01:23 AM

You're very welcome!

If you're talking about Jeff Brook's Fokker D.VII thread, here's a link to it. http://www.theaerodrome.com/forum/sh...ad.php?t=24887 Search for Fokker Dr.1 or Fokker triplane, you should find plenty of information about them here on the Forum.

pvk308 · 4 January 2018, 01:26 AM

Yes found it mate thanks for the link though appreciated

gipsymoth236k · 4 January 2018, 11:32 AM

Hi Steve,

The original design (final Fokker factory production version) of the Fokker Dr.I fuselage contained MANY differing diameter sizes of tubing:

LONGERONS - the top longeron was 20mm starting from the front firewall station and went back to the rear cockpit station (where the longeron line gently bends downward); from there, it was spliced-in (telescoped) with 18mm tubing which went back to the step-down station for the horizontal stab; from there 16mm tubing went back to the sternpost. The bottom longeron was also 20mm starting from the front firewall station and went back to ONE station bay PAST the rear cockpit station (this provided stronger 20mm longeron tubing for the 13mm tubular foot step assembly to clamp onto); from that station, the longeron diameter reduced (telescoped) with 18mm tubing all the way back to the sternpost (no 16mm tubing).

(wish we could post large drawing files here!)

Hope this answers your questions?

Regards,
Gary Sewall
garysewall@aol.com

pvk308 · 4 January 2018, 01:16 PM

Thanks for the reply Gipsy pm sent mate

'14-'18aviationcollector · 4 January 2018, 06:21 PM

Quote:

Originally Posted by pvk308

Yes found it mate thanks for the link though appreciated

No problem at all mate!

Gary is one of the members I was hoping would reply to your enquiry. He is probably the best member to provide information about the Fokker Dr.1 structure, since he has drawn it very accurately, and has researched it thoroughly. I see that you have sent him a PM. I have many drawings relating to the Fokker D.VII, drawn by Dick Funcke. I am sure that he is a member here too. The sizes I can see on a table which gives the sizes of the tubes are: 8, 13, 16, 18, 19, 20, 22, 25, 28 and 35. As with most, if not all WW1 typse, some sources contradict other sources, and individual aeroplanes can vary. Although these tube sizes relate to the Fokker D.VII, many, if not most of them are probably common to the Dr.1. I am sure that Gary will be able to give you much more definitive information, and show you where on the fuselage each sized tube is located.