Voskhod Build Complete

The Voskhod build that I started back in January is finally finished.  I got the main engine bells painted.  Then I drilled small holes at the base of the core and boosters to accept the tab that is on the engine bells.  They were then glued into place with thick CA.  The vernier motors were painted and installed on the core and boosters.  For the core, the full length of the Airfix vernier motors fit within the cavities that were on the sides of the core body.  For the boosters, I had to trim all the part away except for the nozzles.  These then fit into the small recesses at the edge of each booster.  They were also glued on with thick CA.

Then I carefully glued the boosters to the core stage.  I again used thick CA.  I added a small drop at four points for each booster.  One at the tip where the top of the booster is attached to the core body and then at two points for the braces.  I also added a drop of CA at the middle of the crossbar where there is a pin that goes into a hole that had been drilled in each booster body.  The Apex kit did not have that pin on the crossbar that came in the kit.  The actual vehicle did not have that attach point either.  The Airfix part that I was using instead did.  I like that idea as it helps hold the boosters on a bit more securely, and at this scale you cannot see where they meet so it does not distract from model.

Next came a fiddly part of the build where I had to attach the second stage to the truss work on the core stage.  Here I put a small amount of JB Weld epoxy at each pin that I had previously added to the second stage.  I then carefully placed the second stage on the truss.  It took a bit of wiggling here and adjusting there to get it into the proper position.  Each of the four pins had to be behind the top of the inverted ‘V’ on the truss so that the JB Weld could have something else to grab onto.  After letting it cure for 24 hours, it is not securely attached.  But I still want to be careful in handling, since the pins holding it together are tiny.

It now sits on its base.  The steel rod fits nicely into the tube that I built into the core stage.  It is very stable on its base.  It now takes its place in my 1/144 scale rocket garden of manned launch vehicles.  I now only need two more to finish the garden, a Russian Soyuz and a Chinese CZ-2F.  That is until Spacex and Boeing start flying crews to the ISS.

Thanks for reading.

Voskhod Update 2

Now that I have finished the Saturn V and the Lego LM I need to get back to the Voskhod 2 model.  When I last posted about this project, I had assembled the stages and put the photo etched brass truss on the first stage.  Since then all parts have had primer applied and also painted in gray.  Then the bases of the stages were painted with chrome silver.  I then glued the 20 engine bells from the Airfix kit to a piece of scrap wood with white glue.  This will hold them in place while painting yet be easily removable after the paint is dry.

Then I noticed that I needed to move a couple of external pipes on the second stage.  From my reference material they were in the wrong position.  After I did that I then drilled some 1/32 inch holes to mount the antennas on the second stage.  I had done a similar thing with the two antennas on the core booster.  To keep the antennas in the proper position until the CA cured I used a scrap piece of .060 strip stock taped to the side of the model.  The antennas were made with .4 mm rod bent to the proper shape.

Next I started thinking about how I was going to attach the second stage to the truss at the top of the core stage.  The second stage/spacecraft section is solid resin and heavier that the entire rest of the model.  If I was doing it again I think I would try to hollow out some of the second stage and spacecraft to lighten it up a bit.  After considerable trial fitting, cussing and thinking, I came up with a solution that I think will work.  I drilled four 1/32 inch holes in the base of the second stage at four points around the stage where a peak of the ‘V’ from the brass interstage touches the stage.  I then used CA to glue in four short stubs of sytrene rod.  This should help me align the second stage on the truss and also provide a bit of extra surface area to glue the two together.  I’ll glue the second stage to the core stage after I attach the strap-on boosters.

It is getting close to final assembly.  Just needs a bit more paint and adding the engine bells to the core and strap-ons.  I also need to get the base finished.  I have it drilled for the steel rod and the rod is cut to length.  I just need to sand and paint the base.

More to come…

50th Anniversary Saturn V Build Update 4

There is some new progress to report.  I’ve continued working on the S-II stage.  I also made a modification to the Monogram third stage interstage.  The ullage motors as molded are squared off on the forward facing part.  On the actual vehicle they were rounded off.  I masked off the areas that I didn’t want sanded, to protect the molded in stringers.  Then I used my sanding sticks and rounded off the motors to resemble the ones on the David Weeks drawings that I’m using as reference on this build.  You can see the process below.

I also noted that the molded in stringers on the S-II were too long on both the forward and aft skirts.  The Apollo 15 S-II stage had some raised insulation bands on the forward and aft skirts.  It seems that the molded stringers are too long by the width of the raised insulation bands.  So I masked off the section of stringers that needed to be modified into raised insulation and used some Tamya putty to fill in the stringers.  When it was dry, I sanded the area smooth.  I think it turned out pretty well.

I also added some additional raised areas that were under the LH2 feed lines.  I used .005 inch styrene sheet stock cut to the proper dimensions.  I glued these on in the proper places and they matched up with my putty raised areas that I had already done. You can see them on the picture below.

I’ll add a bit of filler putty to blend them in with the raised band.  The next thing I did was to remove the remaining S-II resin parts from their pour plug.  These were the Engine Cutoff Sensors.  They are TINY!  It was quite a challenge to cut them off the pour plug without sending them across the table.  It wasn’t any easier smoothing the backside so it would lay down properly on the S-II.  All five turned out fine.

The last thing to report is the completion of adding the PE parts to the S-II.  These required removing some of the raised stringers.  They are now attached.

The next thing to do with the S-II is add a few of the resin parts.  I’ll wait to add the LH2 feed lines until it is painted.  If I did it now masking for paint would be a royal pain.  I’ll put on the LH2 fill and drain port and the engine cutoff sensors, but the rest will have to wait.

I’d like to get some primer on the parts that are ready, but winter just won’t give up.  The garage where I do my painting is just too cold.  Hopefully spring will show up soon.

50th Anniversary Saturn V Build Update 3

Since the last update I’ve added all the PE to the aft skirt. Now I need to add in the missing stringers on the fairings and fill the slot for the systems tunnel. I will be using the systems tunnel from the Monogram kit since it is longer and comes closest the proper length, therefore I need to fill the slot.

Below is a shot of one side with the PE and air scoops. You can also see the brass rod extending through the top of the skirt. I used some JB Weld to help hold it in place. The resin fins are from the New-Ware set and are just friction fitted to see how they look. I’ll wait to actually install them until it is painted.

One of the pictures is rotated 90 degrees to show one of the sides where the stringer had to be rescribed after removing the large hump.

There is also a view of the bottom with the brass heat shield in place. You can see the small amount of brass tube protruding that will be used to locate the center engine.

I’ve added the missing stringers to the the engine fairings. Below is a shot of the work in progress. They are .3mm styrene rod glued on with Plasti-zap CA. It doesn’t set quite as fast as thin CA, so I’ve got a few seconds to get them lined up properly. I used long strips to give me plenty of area to get my fat fingers in there to place them properly. After the CA sets then I can just snip them off with my X-acto. In the picture you can barely (on the right quadrant) see the that the depression for the systems tunnel is filled. I used some styrene sheet and then filler putty.

I’m using the Airfix interstage. The Monogram interstage has a taper that is too big for me to ignore. The Airfix part is more straight. I’ve also removed the four ulage motors and the extensions of the second stage detail that appear on the interstage. I’ve got some filling and rescribing to do on this part.  Plus a PE part needs to be added.

Below are also a couple of shots of the S-IC. It is mostly done. Just need to do some filling where the systems tunnel from the main body meets the aft skirt. I’ve added all the PE to the S-IC. Both the aft skirt and the main body are from the Airfix kit.

I’ve also started on the S-II stage. I’ll be using the Monogram part for this. Since I have to remove all the molded on details anyway, I thought I’d use the Monogram part since it does not have that huge hump at the seam line in the stringer sections. At this point I’ve removed all the molded on details. I will have to remove some of the molded on stringers on the forward and aft stringer sections. They are too long. Time to make some measurements.

I’ve also removed the resin parts from their pour plugs. I’m amazed that I didn’t break any of them while removing the plugs.

Pretty good progress so far.  Maybe I’ll make the July 20th deadline.

50th Anniversary Saturn V Build Update 2

More progress has been made on the Saturn V build.  I have removed all the raised detail from the aft skirt heat shield.  That all had to go in order to install the brass part from New-Ware.  The brass part is very nice and has much better detail that what was on the original piece.  After removing the raised detail I got to thinking about how I was going to mount the model on its wooden base.  I have used steel rod in the past and that works well.  All I have to do is figure out how to accommodate the rod in the base of the model.  I am using 1/8 in brass tubing and that will slide over the steel rod that is in the base.  I used some paper tubes and epoxy to cover the hole where the center engine will be mounted.  After epoxying the tubes in place and filling them with epoxy, I drilled an 1/8 in hole from the center engine through the tube and out the top of the aft skirt part.  I then used JB Weld and put the 1/8 in brass in the drilled hole and about 3/16 in out the bottom.  The extra out the bottom will aid in mounting the center engine.

After doing that I decided that having a 1/8 tube projecting from the heat shield would be a great way to mount all the engines.  You can see the 1/8 in plastic tubes that I epoxied in place for each engine.

The pictures show the rescribed ribbing where I sanded the hump down.  You can also see that I have started adding some of the photo etched (PE) details to the aft skirt.

50th Anniversary Saturn V Build Update 1

My New-Ware detail set came in, so I’m getting back to the Saturn V build.  The resin detail parts are very nice.  I’ll be using the batted F-1 engines that came with the New-Ware set.  As far as the aft skirt goes, I’ll be using the resin air scoops that are on the engine fairings.  I looked at using them as is and removing my sheet styrene additions, but I don’t like the way that they are modeled as recessed parts.  They were not recessed on vehicle, they were actually on the outside of the skirts. (Update: They actually were recessed, but they also had a raised section of scoop that is not on the New-Ware parts.)  So I cut the scoops out of the part and discarded the rest.  I will be using my styrene add-ons after all.  I will then attach the air scoops to my styrene additions.

The pictures show most of the resin parts and how nicely they are molded.  There is a fret of etched brass that has many more details on it.  I’ll post a picture of those soon.

The Airfix aft skirt has a very noticeable bump on the mold lines.  I really want to get rid of those, so I have sanded that section of the aft skirt flat, and I’ll try scribing new ribbing in those areas.  I really don’t want to sand off all the ribbing and try to replace it with styrene strips or scribing new ones all the way around the skirt.  We shall see how it goes.

Voskhod Update 1

Time for a quick update on the Voskhod build.  I started on the first stage.  I drilled a 1/8 in hole in the first stage base part.  Then I cut a piece of brass tube to length and glued on a cardboard centering ring to one end.  The other end will go through the hole in the first stage base part.  I then glued that assembly into one half of the first stage using epoxy.  When that setup, I then glued the second half on using my Tenax substitue.  I also put a dab of epoxy on the cardboard centering ring to attach it to other half of the first stage.  When everything was set I tested it on my Vostok model base and it works fine.

I then started filling and sanding on the first stage and the strap on boosters.  The first stage also has the booster truss completed.  I was able to use the Airfix parts and I think they will look good.

If you look at the pictures below you will see the strap-on boosters lined up behind the first stage that is being worked on.  They actually are lined up in a specific order.  I found out that the strap-on boosters fit better at certain positions on the truss.  I test fitted all of them and noted which position worked best.  Then I made a small mark on the back side of each strap-on.  The mark will never be seen since it is on the back side next to the first stage.  I also had to trim a bit of the first stage where the top of the strap-on meets the first stage.  There is a bump at that point where the tip of the strap-on is to be mated to the first stage.  All of the strap-ons were too high by just under a 16th of an inch.  I trimmed each mating point according to where each strap-on would be placed.  Everything now seems to fit.

I also added the interstage truss brass to the top of the first stage.  The photos I can find of Voskhod 2 are very inconclusive as to what that area is supposed to look like.  I took a path that I think will make the model work and look like some of the photos.  The brass interstage truss comes as a “Y” shape.  The tail of the “Y” is supposed to run from the first stage body to the end of the stage at the blast plate.  Then the top of the “Y” is the truss work that actually separates the stages.  I think you can see in the photos what I mean.  I used JB Weld epoxy to join the ends of the truss and CA to attach it to the first stage.  My research photos also show that if the tails of the “Y”s are used then there is a small raised line around the bottom of the “Y”s.  I added that with some 0.5mm styrene strip stock.

Next step is to primer all the parts.