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      Metropolitan2


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      Post #71830, posted on 02-28-2019 GMT-5 hours    
      Yesterday I received an exiting notification that this conversion kit is available from Hannants for UK Pounds 63,00.
      I´ve ordered one set without hesitation.....

      This set makes it possible to make a long-wanted 1/72 model of the Douglas ultimate propliner come true!

      Now, who will produce an accurate 1/72 kit of the Convair CV-440 "Metropolitan"?

      In the meantime - happy modelling everybody!

      -Harry B 😌

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      Challenger350Pilot


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      Post #71834, posted on 02-28-2019 GMT-5 hours    
      Now THIS is exciting! Wonder if anyone knows what's in the box, or can supply a photo of the parts in the box. Looks very interesting. Any details yet, specifically, on the quality of the parts and detail of the parts themselves?

      Here's a link to the Hannants website/cataog listing:

      https://www.hannants.co.uk/product/TWC72035

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      waltmertins


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      Post #71837, posted on 02-28-2019 GMT-5 hours    
      So cool!
      I order mine already.
      We need decals now for sure!

      Walter

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      Jennings


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      Post #71838, posted on 02-28-2019 GMT-5 hours    
      I can’t find any mention of this set on the AIM web site, nor can I find any photos of the actual parts.

      Does it include new wheels (a requirement for the DC-7C)?

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      VFD


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      Post #71844, posted on 03-01-2019 GMT-5 hours    
      I've ordered a set as well. As soon as I receive it, I'll be updating my 1/72 DC-7C sheets to fit the new conversion!

      Mike

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      waltmertins


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      Post #71970, posted on 03-13-2019 GMT-5 hours    
      I just received mine,

      Lots of resin in the set.
      Very nicely done but no, no wheels!!!



      Walter

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      pinky coffeeboat


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      Post #71976, posted on 03-13-2019 GMT-5 hours    
      Thanks Walt, it looks a pretty decent set.

      Jeff

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      Jennings


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      Post #71978, posted on 03-13-2019 GMT-5 hours    
      It looks nice, but without the unique DC-7C wheels it’s not that useful.

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      wally


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      Post #71994, posted on 03-14-2019 GMT-5 hours    
      hi jennings,
      The Goodyear tyre application chart gives the following:

      DC-6 MAIN WHEEL-15.50-20 NOSE WHEEL- 15.50-20
      DC-7 MAIN WHEEL-17.00-20 NOSE WHEEL- 17.00-20

      No mention of special size for DC-7C.

      could you please advise

      1 - What is the overall diameter and width of the wheels on the DC-6, DC-7 and and DC-7C ?

      2 - Are any photographs available of the two types of wheel. If yes, please post them.

      if the wheels are significantly different then gear leg length would be affected no?

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      tnuag


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      Post #71995, posted on 03-14-2019 GMT-5 hours    
      Can anyone post photos and dimensions of these wheels ?

      Neil Gaunt

      Aircraft In Miniature Limited

      Website: www.aim72.co.uk

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      Jennings


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      Post #71997, posted on 03-14-2019 GMT-5 hours    
      I'm not sure about the size, but the hubs, especially visible on the nose wheel, are completely different.


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      wally


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      Post #71998, posted on 03-14-2019 GMT-5 hours    
      OH! MY! GOD!

      what a showstopper!

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      tnuag


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      Post #71999, posted on 03-15-2019 GMT-5 hours    
      This is from Flight magazine of 6th July 1956:
      Tubeless tyres (1700 x 20) on Goodyear wheels and brakes are fitted to the main undercarriage gear, which can be dropped independently of the nose unit to act as a speed brake at any i.a.s. The nosewheel has a single 1500 x 16 tubeless tyre on a Goodrich wheel, and is hydraulically steerable to pivot the aircraft about either main leg.

      The best description of tyre sizes gives this, where Type III:is the nearest to the sizes in the Flight article:
      Three Part Name Sizes cover most of today’s designs and typically describe the Outside Diameter, Section Width and Rim Ledge Diameter e.g. 15x6.00-6, the tyre is 15 inches tall, 6 inches wide and sits on a 6 inch wheel.

      Type Tyre Size Overall Diameter Section Width Wheel Diameter
      in Inches in Inches in Inches

      Type 1 27" 27" - -
      Type III 6.00-6 - 6.00 6
      Type VII 40 x 14 40 14 -

      And from Wikipedia,
      Historical tire codes
      North America

      Prior to 1964, tires were all made to a 90% aspect ratio. Tire size was specified as the tire width in inches and the diameter in inches - for example 6.50-15.[24]

      From 1965 to the early 70's, tires were made to an 80% aspect ratio. Tire size was again specified by width in inches and diameter in inches. To differentiate from the earlier 90-ratio tires, the decimal point is usually omitted from the width - for example 685-15 for a tire 6.85 inches wide.

      Thus, I think that because the decimal point is omitted, even though is is written in 1956 it is a type III code and thus an 80% aspect ratio.
      The main wheel is 1700x20 which means a section width of 17” on a 20” diameter hub
      The nose wheel is 1500x16 which means a section width of 15” on a 16” diameter hub


      So this is the plan:-

      I will produce new wheels, which will be made in resin and sold as a separate item. We cannot add them to the current production because too many packs have already been delivered. I will use the above dimensions. But will retain the overall diameter of the Heller items to avoid the need for new legs.


      If anyone has any constructive suggestions, please post them in the next week, that is by the 22nd March 2019.

      Neil Gaunt

      Aircraft In Miniature Limited

      Website: www.aim72.co.uk

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      Challenger350Pilot


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      Post #72009, posted on 03-16-2019 GMT-5 hours    
      “I will produce new wheels, which will be made in resin and sold as a separate item.”

      THIS is exciting! Once they’re ready for release for sale, where may we purchase them?

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      tnuag


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      Post #72025, posted on 03-18-2019 GMT-5 hours    
      The new wheels are designed - diameter is as for Heller kit, but with revised hub detail and treads based on Jenning's photo.

      They will be available from Hannants when they are made - code will be TWC72035W

      Neil Gaunt

      Aircraft In Miniature Limited

      Website: www.aim72.co.uk

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      Jennings


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      Post #72026, posted on 03-18-2019 GMT-5 hours    
      Quote
      wally :
      OH! MY! GOD!

      what a showstopper!



      I'm sorry you feel that way. Some of us (shockingly, for people who design and build scale models and related accessories) are very detail oriented. If you're not, that's great for you, but please stop with the snide comments that imply that those of us who are are somehow wrong and that you're right. If you want to put conestoga wagon wheels on your DC-7C conversion, be our guest. Meantime, grow up a little and learn that the world does not revolve around you.

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      TWA Brat


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      Post #72027, posted on 03-18-2019 GMT-5 hours    
      These are data from the DC-7/DC-7B/DC-7C FAA Type Design Certification Sheet:

      4 Main wheel-brake assemblies, 17.00-20, Type III
      (f) Goodyear (DC-7C)
      Wheel Assembly No. 9540934
      Brake Assembly No. 9560286 (Skydrol)
      or
      (g) Goodyear (DC-7C)
      Wheel Assembly No. 9540934
      Brake Assembly No. 9560285
      Main wheel tires
      (a) 20-ply rating, 15:50x20, Type III, Nylon with regular tubes (DC-7 and DC-7B)
      (b) 22-ply rating, 17:00x20, Type III, Nylon tubeless (DC-7C)
      Nose wheel 44", Type I
      (a) Goodyear Model 44NBM (DC-7 and DC-7B)
      Wheel Assembly No. 9540758
      (b) Goodrich 16:00-16, Type III (DC-7C)
      Wheel Assembly #H-3-866 (Douglas Dwg. #3535153)
      Nose wheel tire
      (a) 14-ply rating, 44", Type I, Nylon, with regular tube (DC-7 and DC-7B)
      (b) 14-ply rating, 15:00 x 16, Type III, Nylon tubeless (DC-7C)

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      RAA188


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      Post #72029, posted on 03-19-2019 GMT-5 hours    
      Quote
      Jennings :
      Quote
      wally :
      OH! MY! GOD!

      what a showstopper!



      I'm sorry you feel that way. Some of us (shockingly, for people who design and build scale models and related accessories) are very detail oriented. If you're not, that's great for you, but please stop with the snide comments that imply that those of us who are are somehow wrong and that you're right. If you want to put conestoga wagon wheels on your DC-7C conversion, be our guest. Meantime, grow up a little and learn that the world does not revolve around you.



      Dude, you're hyperventilating again. Slow down, have a beer, you're gonna be OK.

      Ironically I'm sitting in beautiful Santa Rosa, CA, home of Charles Schulz of the "Peanuts" comic strip fame...For all I can think is:

      "Good grief."

      I'm with Wally. That's a beautiful machine. Dial back your projection a few astronomical units & give the guy a break...

      Neil has made beautiful parts for building the model in 1:72, and now that he has none other than your straight-from-Donald-Douglas'-soul-himself 100% guaranteed perfect and (because *you* said so!) blessed by the angels dimensions for...GASP! WHEELS! Maybe it'll be OK to build, in another dimension of space & time.

      ...As a grown adult of reasonable capacity I'll gladly pick up one of Neil's sets, tweak the wheel hubs if I feel I must, & build a model of one of the sexiest propliners ever built.

      Feel free to sulk, whine, cry, and hold your breath 'till you turn blue as much as you want. I'm here to build models, not measure the actual machines with calipers and bemoan that my local ramp-rat has tires underinflated by 0.003psig.

      The rest, filed under "Whatever."

      Neil: Count me in for a conversion. Wally: Long live the Seven!

      Rob in AK

      Just get me back to Alaska. I'll find home from there.

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      tnuag


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      Post #72030, posted on 03-19-2019 GMT-5 hours    
      Many thanks

      Neil Gaunt

      Aircraft In Miniature Limited

      Website: www.aim72.co.uk

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      TWA Brat


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      Post #72031, posted on 03-19-2019 GMT-5 hours    
      Apparently the DC-7C Goodyear main wheels were magnesium. Could be a color difference worth noting?

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      tnuag


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      Post #72658, posted on 06-10-2019 GMT-5 hours    
      Regarding colour change for magnesium, I would doubt it because the wheel hubs would probably be painted, if only as an anti-corrosion measure.

      Regarding use of wheels, firstly the DC-7C wheels should be with Hannants within a fortnight, and whether a modeller uses them is personal choice.

      This wraps up the DC-7 saga except for decals which are in work.

      Neil Gaunt

      Aircraft In Miniature Limited

      Website: www.aim72.co.uk

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      tnuag


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      Post #72815, posted on 07-01-2019 GMT-5 hours    
      The wheel set was delayed (I was busy) but is now with Hannants - part number TWC72035W

      The DC-7 conversions saga is now completed

      Neil Gaunt

      Aircraft In Miniature Limited

      Website: www.aim72.co.uk