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Sergeant

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    Vancouver, WA USA
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    Military history, scale modeling and fly fishing

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  1. The manufactures drawing shown in the background on my computer is from @dogsbody and @Air Ministry it allowed me make corrections to the ventral turret dimensions that I carved out of resin. The turret is now an accurate 1:48 scale model of the original FN-64 turret. To create this model turret I mounted a raw resin block on a Dremel #401 mandrel that is normally used for polishing bits, but first drilling a 3/32" hole in the center of the block to take the stress off the resin when the mandrel is screwed into the hole. Then I turned the resin block with a Dremel 3000 Rotary Tool at 12000 to 15000 rpm like a lath using an 8-inch b-a-s-t-a-r-d file as a cutting tool. Afterward I used a 400 and 1500 grit sanding sponge to smooth out the surface. To form the notch in the turret I used a Dremel #9902 carving bit like the one show below. I enjoy carving resin, but I don’t know a lot about its properties, so I use Eduard resin which from experience has excellent quality for carving. It’s not too soft or too brittle and that is important when carving with a rotary tool. Harold
  2. Thank you, Charlie, Cees Broere and Chris. In earlier posts we discussed when the FN-64 ventral turret was fitted on Canadian Built Lancaster KB700. I believe it was Chris who mentioned that FN-64 may not have been on the aircraft when it left Canada, but it was installed while it was in RAF service. I have seen several videos regarding the Avro Lancaster, but I just started another that show original video from August 1942 when KB700 flew to the U.K. There is no FN-64, but there is a photograph below of KB700 with the turret clearly visible. My intention was to build the Ruhr Express KB700 the way it would have looked while in RAF service. However, I did not take into consideration modifications that took place during its 49 missions. So, I have decided to make this build represent KB700 after it left Canada and before the H2S Bombing radar was installed. Harold
  3. Thank you @Air Ministry that 6-inch differences is a little over 3mm in 1:48 scale. I can make the correction. The model FN-64 I created out of resin is 20.8mm in 1:48 scale, so in 1:1 scale that is 39.307 inches. I need to loose about 5-inches (2.6mm). Harold
  4. The next step on the FN-64 turret is to add some resin to the bottom of the turret, so I have material to carve out a shape to match the curve of the fuselage. If you notice the turret in the photograph below there is a visible rim (ring) where the turret housing and fuselage, make contact. Originally, I had planned to remove plastic on the fuselage where I circled the parts in the photographs below, but after considering how to attach the FN-64 it seems unnecessary because I can glue the turret to the bottom of the fuselage. I may include two brass wire pins in the bottom of the turret that will fit into holes I drill in the fuselage. I have used this method in the past for ensuring proper location with good success and it reinforces the glue joint. Harold
  5. The photographs below are a 1/48 scale FN-64 ventral turret for Avro Lancaster Mk. X model. The turret is made of Eduard resin bits that I saved from different kits and glued together to make a piece big enough to work. I used a combination of Dremel Tool bits, files and sanding sponges to carve out a shape resembling the drawing provided by @dogsbody and @Air Ministry plus other photographs of the turret shown in earlier posts. I also ordered the Master-Model 1/48 brass .303 caliber machine gun barrels to install in this turret housing as well as all the other turrets on this Lancaster model. Harold
  6. Chris @dogsbody and @Air Ministry you are absolutely amazing. This is exactly what I needed. Thank you both. By the look of some dimensions, I'm guessing the drawing is in Imperial units (British Imperial System). Height of turret housing would be 14.63 inches, 4-inch radius on the back of the external housing, 11.5 inches center-to-center distance between the gun barrels. I can see in the title block it says FN-64 but the drawing does not show the notch or recess on one side of the housing between the two Browning machine guns that extend into the center of the housing. Perhaps it was a later revision. My original estimate of 8mm was a little off because the correct height of the housing external to the fuselage is closer to 6.6 or 6.8mm in 1/48 scale. That would be roughly 12.5 inches in actual height. I am so pleased to have this drawing as a reference, I can't thank you both enough. Harold
  7. I love the detail, Craig. You have created one of the most realistic looking Lancaster models I have ever seen. The panel lines and rivets just pop out in your photographs like you would expect them to on an actual airplane. Harold
  8. I have looked for manufacture's drawings of the FN-64 ventral turret, and according to a Lancaster restoration and fabrication expert they do not exist. https://www.lancasterraf.co.uk/fn64-turret/ If anyone has information regarding manufactures drawings of an FN-64 I would greatly appreciate your help. So how do you build something in scale modeling when you don't know it's dimensions? I know the diameter of the mid-upper turret in 1/48 scale is 21mm. By comparing the unknown height of the 64 turret to the known diameter of the mid-upper turret I can estimate the height and the radius of the FN-64 external housing. Beyond that it is just guesswork and speculation. I can see in the photographs below and the photographs Chris @dogsbody provided the external housing is basically the shape of a round cast-iron sink with a notch or recess on one side between the two Browning machine guns that extend into the center of the housing. Harold
  9. Thank you @elger @dogsbody and @Winded Penguin Chris, I appreciate the photographs and support in scratch building the external part of an FN-64 turret. I am looking forward to doing this, it is a skill I've been developing little by little with each project, carving plastic resin with a Dremel tool. @Winded Penguin I feel the same way you do about the Lancaster. I purchased mine about a year ago but did not want to start on it until I had more experience. After I completed the 1/48 RAAF PBY-5 Catalina with @JackG I felt ready to build this Lancaster. I also have another reason for treating this build with special reverence. My Uncle who I was named after was an RCAF Flight Lieutenant and pilot of Lancaster's in RAF 153 Squadron. He flew 11 missions over Germany in 1944 and before that was a Flight Sergeant and pilot of RAF fighter aircraft in 153 Squadron. Harold
  10. Thank you, Chris. After looking online for an aftermarket 1/48 Frazer-Nash 64 ventral turret without success I decided to scratch build one with good quality resin blocks I saved from an Eduard Lancaster wheel set I purchased. I noticed that HK Models have molded a circular feature in their fuselage parts shown below in the correct location of the ventral turret. I measured the diameter of that molded feature and its 21mm, the same diameter as the mid-upper turret. The Periscopic Gun Sight Illustration and sketch below give me enough information to carve or form the resin blocks using a Dremel Tool into a shape that represents the external part of an FN-64 turret. I can use Master-Model brass Browning .303 cal. machine gun barrels that were intended for 1/48 Boulton Paul Defiant. Even though the Lancaster B Mk. I did not find the FN-64 ventral turret very effective it was never the less installed in both the R5727 and KB700, so in the interest of authentic scale modelling and historical accuracy I would like this Canadian Lancaster model to have that turret installed as well. Harold
  11. Thank you, Chris. @dogsbody Your photograph is the evidence I was looking for and could not see in my photograph. The mid-lower (under) gun turret and barrels are clearly visible. When I said in my previous post the HKM kit does not have a mid-lower turret that may be incorrect. There is an option shown in the kit instructions that I did not understand, but it may be the turret, please look at Step 18 - Option B of the instructions. https://www.scalemates.com/products/img/4/9/1/1335491-98-instructions.pdf After more research I am convinced that clear plastic part #G-24 is not meant to be an FN-64 mid-lower gun turret. I don't know what this part is but there is nothing like it on a Canadian built Mk. X as far as I can tell. There is also information that suggest the FN-64 gun turret was ineffective and seldom used against aerial attacks from below. So, the question is do I try, and scratch build an FN-64 gun turret or just not include it on the model? Harold Step 18 - Option B. The instructions do not say what clear plastic part #G-24 is called, but it appears to be in the location of the mid-lower gun turret. This is what I would expect to see in the HKM kit for a Type FN-64 mid-lower gun turret. The Lancaster was originally designed with a ventral gun turret, the FN-64. It proved ineffective and was seldom used for the reasons mentioned below.
  12. @RJP I was confused about your statement in bold text above: "It also had the mid-under turret, a Frazer-Nash 64 just aft of the bomb bay". At first, I thought you were talking about the original KB700 because I could see in the recent photograph that FM213 did not have a mid-under turret. Then I realized in the context of your complete paragraph you were comparing FM213 to the original KB700 which led me to think the FM213 had this mid-under turret at some point in its history. When I went looking for photographic evidence, I discovered an interesting coincidence. Lancaster R5727, the British built Mk. 1 used as a pattern to build the original KB700 Mk. X had a mid-under turret as shown in the photograph below. However, KB700 Mk. X did not have the mid-under turret and neither does FM213 or the HKM Avro Lancaster B Mk. I. So regardless of whether FM 213 had a mid-under turret at some point in its history the KB700 did not and neither does the kit which makes it a perfect candidate for conversion to the Canadian Mk. X KB700. If I am wrong or have my facts confused, please correct my understanding. Harold British built R5727 Canadian built KB700 Original Ruhr Express KB700 Newer Ruhr Express KB700 (FM213)
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