1/144 Saturn I Block I Build Update 3

More progress has been made on the SA-1 model.  The final detail bits have been added.  After going through more photos of the SA-1 vehicle, I noticed that the fuel tank on quadrant 1 does not have the same valve detail as on the other tanks.  Instead of a recessed valve there is a raised detail where the on pad fuel fill and drain line attaches.  I made this part with a stack of styrene strips with each strip getting smaller as they go up.  This helped in shaping the part since it has tapers on both ends.  The top appears to have a round shape so I sanded that in.  The part then got attached over the original tank valve recess.

Next I moved on to the air scoops on the outboard engine fairings.  I’ve been thinking of how I would model these parts since I began the build.  I finally came up with an acceptable solution.  I pulled out the Walthers piping sprue that I used earlier to create the turbo pump exhausts.  I looked carefully at the ends of the runners that lead to some of the parts on the sprue.  Some of the ends had a rounded profile and were close to the right diameter.  I used a sharp #11 blade and cut off the hemispherical ends of the runners and then cut those in half.  This left me with some 1/4 sphere shapes that were close the size needed.  I then glued them in place on the fairings and used the #11 blade to shape them to more closely match the correct profile.  They may still be slightly oversized but they look close, so I’m going to leave them at that.

Next I noticed that there were vent openings at the top of some of the fuel and LOX tanks.  Not all of them just some of them.  I found some drawings online that showed the plumbing of those vents.  The drawing along with some photos allowed me to determine which tanks had the vent holes.  I used a small drill bit in my pin vice and made the vents.

I then primed the upper dummy stages and the first stage.  I’m sure it won’t be the last time I prime these parts.  It seem that every time I think I’m done, I find some more pin holes that need to be filled.  I also attached the engines and turbo pump exhausts to a paint stir stick and primed them as well.

The next thing will be to glue the upper stages to the first stage.  Some more sanding and filling will be required at the join.  But that is for next time.  Thanks for looking.

1/144 Saturn I Block I Build Update 2

I’ve had other things going on, so it has taken me longer than I planned to get back to the build.  But I now have made some progress.  First I trimmed the outboard engine fairings.  They have an angled edge rather than straight.  The angle needs to somewhat match the subtle angle on the boat tail.  The next thing to do was to complete the turbo pump exhausts. I cut out some brackets from 0.010 styrene sheet and attached them to the pipes.

I then drilled some small holes in the first stage boattail to accept the exhaust pipes.  I’ll attach them later in the build.  I also drilled holes at the base of the fuel and LOX tanks to match photos of SA-1.

Finally, for this post are a couple of pictures of the continuing filling and sanding of the model to cover some of the blemishes in the castings.  You can also see that I’ve added some tunnel covers to the fuel tanks and a vent pipe on the fuel tank of Position 4.

That’s it for now.

1/144 Saturn I Block I Build Update 1

I finally made some new progress on the SA-1 model.  I glued the top section of the first stage in place.  I then also glued the second and third stages plus the nose cone together.  The first stage needs more clean up and filling.  I started where the tanks meet the boat tail.  I thought about using my Dremel to get rid of some of the junk in between the tanks on the first stage, but it is such a confined area that I’m afraid that I’ll mess up the tanks on either side.  I think I’ll be adding filler between the tanks to cover up the lumps an bumps there. The dummy upper stage assembly also requires some filling and sanding.

While waiting for some filler to dry I started scribing the panel lines into the base of the boat tail.  I also drilled some holes to insert locator pins for the engine bells to be added later.  Next I drilled a hole in the base of each engine bell.  I also glued some 3/64 inch styrene rod into each of the locator holes in the boat tail.

The outboard engine fairings that come in the kit are too small and do not fit well on the boat tail.  I instead used some 0.010 inch sheet styrene to make some replacements.  I glued them on with Plasti-Zap CA glue.  Since each curve on the boat tail is a bit different on this kit I numbered the edges of each fairing so I could get them in the right place.  Plus I continue to add filler to the tanks on the first stage.

I also started making the inboard engine turbopump exhaust ports.  I’m not that great at bending styrene rod, so when I can, I adapt other parts.  I had some piping left from a Walthers Piping kit that I used on a steampunk rocket a while back.  I pulled out the runners to see if there were some parts there that I could use as a turbopump exhaust.  Sure enough I found some.  I only had four pieces that I could use, so I had to make sure not to mess them up.  After cutting them from the runner I carefully trimmed off the ends that I didn’t need.  I then drilled out the ends that will be seen so they look more like pipes instead of rods.

That’s it for now.  I have to make some brackets for the turbopump exhausts before they can be attached.  I also have some more detail items that need to go on the first stage tanks, but first I have to finish the filling and sanding.

More to come.

1/144 Saturn I Block I Build

I’m starting a new build.  This will be the first for the year.  Last year I completed three models.  That is a record for me.  I’ll see if I can do better this year.

First on the table this year is an all resin kit of the Saturn I Block I (SA-1) from Martin’s Models.  I purchased this kit directly from Martin in the UK at least 4 years ago.  Some people say that the castings are pretty good.  I’m not quite in that camp.  Maybe over the years his casting process has gotten better.  The castings in my kit are not quite up there with New-Ware or RealSpace Models.  There are some casting flaws and some parts are a bit out of round, but it should still build up to a nice model.  I’ll just have to do more cleaning than usual and do a little scratch building.

First thing I did was to gather everything together to see what I had to work with.  A number of the parts will require some clean up and filling.  On some of the parts it is hard to tell where the the pour plug ends and the part itself begins.  I also don’t think I’ll be using the included display base.  I’ll display it like I’ve been doing with my 1/144 manned launchers.  The included decals are not bad, but I might be doing some custom ones before it’s all over.

I cleaned up the parts and removed the pour plugs as best I could tell.  Many of the parts will require more work to look good.

I sanded the bases of the major sections and then started stacking them to see how far off from square I was.  It is really difficult to sand them exactly square, so I rotated the parts until I got what looked like a straight rocket from the bottom to the top.  I also made some alignment marks so that as I stack them later for gluing I can be sure that the alignment remains in the original orientation.

Next, I made some marks on the first stage boat tail.  This will allow me to drill a hole in the center for the rod that will hold the model in place on the base.  I also made a diagram to assist me when I scribe the lines on the base heat shield.

Then I glued the first stage tanks to the boat tail.  I had to use a couple of shims to get a vertical stage.  I attached them with CA.  Then I started the process of filling the areas where the tanks meet the boat tail.  This is still a work in progress.  You can also see from the pictures that there is some clean up to be done between the tanks as well.  I also filled  a major divot on the boilerplate second stage.

That’s all for now.

2001 Discovery XD-1 Build Complete

Well construction is done on the Discovery XD-1.  I made my goal of finishing it before Christmas (if you don’t count the stand).  I’m still working on how I want to display it.  I don’t know if I’ll use the stands that are included in the in kit or if I’ll try to find something else.  It is quite a long model and takes up a fair amount of space.  I may try to find a solution that allows me to hang it from the wall.  Anyway, when I come up with something I’ll probably post an epilogue on it.

I glued the forward neck sections together and added the spine connecting piece to the reactor section.

With painting complete I removed the remaining masking and started installing the interior of the command sphere.  I first installed the window shelf before using CA glue to place the cockpit in the upper half of the sphere.  I then applied some JB Weld epoxy around the edges as an additional light blocking and to permanently attach the cockpit.

Next came the pod bay installation into the lower sphere half.  Here I needed to make an adjustment.  If i tried to place the pod bay in where it fit then the extended pod platform wouldn’t fit since I had included the door frame.  If I had left off the door frame then it would have been fine.  To fix it. I installed the pod bay just a bit higher in the sphere half.  This meant that the bottom of the interior would not rest in the bottom of the sphere.  This would lead to a very weak attachment at just a couple of points at the top of the pod bay.  To sturdy it up, I added some styrene extensions to the bottom of the pod bay.  They were at first attached with CA then after the pod bay was properly glued in, I used some JB Weld to more permanently attach them.  It is now installed very firmly to the sphere.

Next I glued the two sphere halves together with some Tenax.  With the sphere together I, soldered the cockpit and pod bay wires together and then added the long wires that will travel the length of the spine back to the batteries in the reactor section.  I then threaded that wire through the command sphere back plate and glued it to the command sphere.

I then turned my attention to the steel rod that went into the reactor section.  I needed to create an opening in it to allow the wires to exit the spine and get attached to the battery switch.  I used my Dremel tool to grind of a section and then used a file to remove the sharp bits.

Now I could start building the spine to put the rest of the model together.  I used a bit of JB Weld epoxy in the back of the command sphere where the forward rod was to go.  Then I threaded the wire through the rod and put the rod in the command sphere back.  Next I glued the neck section to the command sphere back.  This would also help center the rod in the command sphere back since there was a bit of play at that joint.

I was then able to start adding the spine sections with CA.  The forward section was finished with the addition of the antenna complex.  The antenna complex also contains the rod connecting sleeve.  I glued the sleeve to the forward rod with a bit of CA trying my best to get the antenna section lined up properly with the command sphere.

Then I moved on to the the rear section of the spine.  First was to thread the wire through the rear rod.  I had to slide on the spine sections and reactor section even though I would not be gluing them at this time.  This was necessary to make it easier to get the wire through the small hole in the rod.  I then applied CA to the rod and sleeve in the antenna array.  Now I could start gluing the spine sections as earlier for the forward section.  Finally the reactor section was glued in place.

Next came adding the containers.  This required special attention to the instructions to be sure that they were glued on in the proper order  Some of the sections were a bit trickier that others since they had only one attachment point and a large over hang on one side.  But it all went well and surprisingly enough I didn’t have to redo any containers.

Once the containers were on I used some black wash on the engine exhausts, glued then in place in the engine stalks and then glued the completed engines to the reactor section.  Unfortunately the engines do not touch each other as they do in the film.  I couldn’t come up with a satisfactory fix so I just left them with a small gap between each other.  I also soldered the wires together in the reactor section which completed the wiring process.  The pictures show the lighting bluer than it actually looks.

I epoxied the stand sections to their steel rods and sprayed them with primer.  I believe I will paint base and rod matte black and the top piece I’ll paint with the base color of the model.  Like I said at the beginning I’m still not sure exactly how I will finally mount it.

That was a fun build and I really like the final product.  Thanks for following along.

2001 Discovery XD-1 Build Part 9

Progress has finally made it to the color coat stage.  After hand brushing the darker gray colors and then masking them I painted everything in my base color using Vallejo Model Color White Gray.  To my eye it makes the perfect base color.  It is almost white with just a hint of gray.  I sprayed all the parts with the base color.  Model Color is primarily intended for brush painting but I was able to airbrush it by thinning it 50/50 with a custom thinner I made that was 66% distilled water and 33% isopropyl alcohol with a few drops of Model Color Flow Improver added.  This worked very well and gave me pretty even coverage.

After painting the base color I removed all the masking, except for the open pod bay door and the cockpit window area.  I let the paint set for a day and then mixed a batch of 25/75 base color/thinner and applied a mist coat over the command sphere and neck parts that had the darker gray areas.  This toned down the difference in shade from the base color and looks pretty good to my eye.  Sorry I didn’t get any before pictures.  I’ll apply a clear flat overcoat to protect the paint.  It is rather fragile and can be damaged if not handled carefully.  The clear coat should give a tougher surface.

Next up will be to start installing the interior parts into the command sphere and continuing the assembly.

Thanks for looking.

2001 Discovery XD-1 Build Part 8

I didn’t get as much done this week as I wanted.  The holidays tend to do that.  But there was progress.

I assembled the 10 spine parts.  These each consisted of 5 pieces.  There were no locator pins since there needed to be room to run the metal tube through them. They did have an over lapping lip that helped the parts go together.  Once the two halves were set, then the three reinforcing ribs were added.  Then I just needed to do that 9 more times.  I also then assembled the cargo/fuel containers.  You have to build 60 containers of 5 different types.  The fit was pretty good.  Some Tenax and a bit of pressure glued them together with very few seam lines.  The parts are all keyed so there is very little chance of putting them together incorrectly, but some organization will speed the process.   There are some seams on the back sides that may not be hidden.  I may not fill the seams if they can’t be seen.  But, they are all done and ready for primer.

I also took the time to glue some sheet styrene pieces into the reactor section to hold the battery holder in place.  They should keep the batteries from moving around when the model is moved.

Now that all the parts are primed, it is time to start masking the larger parts and painting the dark panels.  I’ve started with the command sphere.  I’ve masked off the areas to remain light gray.  I’ve started painting on the two darker shades of gray.  You can see that on the command sphere half on the right in the photo.  When I get all the darker gray areas painted I’ll mask over them and spray on some Vallejo White Gray for the base color.  After that will come some detail painting on the spine and reactor sections.  One that is complete the whole thing will get a mist coat of White Gray to tone down the dark panels.

That’s it for now.