Dragon 1/144 X-15 Build Update 2

I’m building X-15-1 in its landed configuration with the air brakes open.  That meant that I needed to fill the open area under the dorsal fin.

Filling the open area on the dorsal fin.

Next, I needed to scratch build the air brake actuator parts since the air brakes will be open and the mechanism will be much more visible.  I started by cutting the components from rods and sheet stock.  The main hydraulic ram was made from .035 rod with the piston end from .020 rod.  The actuators were cut from .015 rod and they were connected to a hub piece cut from .005 sheet.  I then cut the “V” shaped rocker from .005 sheet stock.

Parts to assemble the air brake actuators. Also note the antennas cut from .005 sheet above the end of the ruler.

I first glued the hydraulic ram parts together and attached them to the hub and then glued that assembly to the back of the open air brake part.  I did cut a tiny part out of the back of the air brake to give the ram a place to rest.

Hydraulic ram installed in air brake.

I then added the actuator parts to connect the hub to the air brake plates.

Actuators added to air brakes.

I then glued the air brakes and ventral and dorsal fins to the fuselage.  Once they were glued in I added the “V” shaped rocker and the air brakes were done.

Completed air brakes with dorsal and ventral fins.

With that completed I glued in the XLR-11 engines.

XLR-11 engines installed.

X-15-1 with its XLR-11 engines had different fuel and oxidizer vent ports than when the XLR-99 engine was installed.  These were a much simpler part which looked like a simple pipe.

XLR-11 fuel and oxidizer jettison tubes. (from “Hypersonic” by Jenkens and Landis)

I used .035 tube to represent the XLR-11 fuel and oxidizer jettison ports.  At this point I also added the landing gear skids and nose wheel.  I also glued on the antennas.

Jettison ports, landing gear and antennas added. The nose wheel is not glued on.  It will be added after paint.

Finally, I glued on the pitot tube and the long needle probe.

Pitot tube, antennas and needle probe in place. Note the different position of the antennas compared to X-15-3.

With that X-15-1 and X-15-3 are ready for primer and paint prep.

Thanks for looking, more to come.

Dragon 1/144 X-15 Build Update 1

I started work on the added details for X-15-3.  The Rarefied Wake Flow experiment was housed in an experiment box at the back of the dorsal fin.

Rarefied Wake Flow experiment (from “Hypersonic” by Jenkens & Landis)

The kit includes the experiment box but it represents a different experiment that was not flown on X-15-3.

Kit part represents a different experiment.

The first thing I did was sand off the molded on details so I could add my details and use the experiment box.  I used sections of .060 and .040 strip stock and a small rectangle of .005 sheet stock to represent the part of the experiment that protruded from the back of the experiment box.

My details added to modified kit part.

I then glued on the dorsal fin and the experiment box.  In the picture the ventral fin has not been glued on yet and the model is being held upside down.

Modified experiment box in place.

The ventral fin can be built either with the air brakes open or closed.  This is done with two different parts.  For X-15-3 in flight I wanted to have them in the closed position.  The closed air brakes are a bit thick so I sanded them a bit thinner.  The kit supplies a back part of the air brake section for posing them in the closed position.  This means that the air brakes are actually a bit shorter so the end plate can be glued on to give them their final length.  If you look at the picture of the ventral fin and the end plate, you can see that the end plate has a “V” shaped detail that is supposed to represent part of the air brake actuator system.  One problem is if you use that part, the “V” is actually upside down.  The open end of the “V” should be facing the fuselage, it does not.  Beside that, I really think that I can scratch a part will look better.

Pic showing the short air brakes and the incorrect end plate.

The first thing I did was to add some length to the air brakes by adding some .010 square strip stock.  I then sanded them fairly smooth.

Strip stock air brake extensions.

I took some .010 sheet stock and cut out a few shapes and glued them together.  I then glued that into the ventral fin between the air brakes.  It is not the most accurate depiction of the actuators, but it is better than the kit part and from a normal viewing distance doesn’t look that bad.

Replacement air brake actuator installed.

I then glued the ventral fin on the X-15-3 fuselage and moved on to the rest of the model.

Ventral fin installed. Note the landing skids in stowed position.

I then added the kit parts for the fuel and oxidizer vent ports and some scratch antennas that I cut from .005 sheet stock.  I also added the ball nose and pitot tube kit parts.

Fuel and oxidizer vent ports added.
Scratch built antennas installed on the ventral side of X-15-3.

With that X-15-3 is assembled and ready for primer and paint prep.  Now on to finish X-15-1.

Thanks for looking, more to come.

Dragon 1/144 X-15 Build

I haven’t posted in a while. It’s not that I haven’t been working on anything. I have been working on this build since October, but I’ve been busy on other things that have gotten in the way of writing posts. I now have made some time to get back to posting my progress.

The latest build from the stash is the Dragon 1/144 X-15 1+1 kit. I bought it about 8 years ago, so I guess now is a good time to build it. The kit allows for two versions of the X-15 to be built from the one kit. I’ll be building the pair as X-15-1 (56-6670) and X-15-3 (56-6672). The X-15-1 will represent the first powered flight (flight 1-2-7) and will be built in landed configuration. The X-15-3 will represent one of the research flights (flight 3-22-36) that carried the Rarefied Wake Flow experiment (it was unsuccessful).

The kit does not contain tail numbers for X-15-3, only ship 1 and 2. I will have to create some decals for that. I’ll also have to produce some other decals for items that were on the ships but are not on the decal sheet. One in particular for X-15-3 is a hand painted design that says “Little Joe the II” with a pair of dice. That was on the #3 ship for a few missions as a tip of the hat to the crew chief who was also the crew chief for the X-1E.

I plan on building these planes mostly out of the box. The fit of the parts is hit and miss. Some of the parts fit nice and snug, but other are loose and sloppy. It has some reasonable detail considering the small scale, but I think there are a few items that I can add without much trouble.

Let’s get into the build.

The nose of the model contains some very shallow depressions representing the RCS thrusters in the nose. I used a straight pin to slightly deepen the holes to make them more visible.  I also added the nose part for the long instrument boom for X-15-1.

You can barely see where I used a straight pin to deepen the RCS thruster nozzles.

I next checked out the business end parts. The XLR-11’s are represented, but they are shallow and do not represent the nozzles very well. The nozzles don’t stick out far enough but I really don’t have a good way to add extensions. I did drill out the nozzles to give them a bit of depth for a more realistic look.

You can see how little depth the XLR-11 nozzles have. Here I have started drilling on the top XLR-11.
Now both XLR-11 engines have had their nozzles drilled out. It is a much better look I think.

Then I turned my attention to the XLR-99 nozzle. It’s not bad and has some molded in details, but I felt it would look better if I drilled out the turbopump exhaust.

There are some molded in details but the turbopump exhaust needs drilling out.
Now the exhaust port is drilled out and has some depth.

I then moved on to the cockpit. It is very basic and has little detail. But when you see the size of the windows on the X-15 and consider the scale of the model, there really isn’t much that will be seen.  The kit has no provision to build the model with an open canopy without some major surgery.  The kit is designed only with a closed cockpit in mind.

I used my references and picked some representative colors for the cockpit tub, instrument panel and seat.  You have to slide the cockpit tub into the model from the open end of the fuselage.  The way Dragon made the fuselage parts as an tube shape prevents seams running down the center line that would have to be dealt with.  But that presents its own problems with getting the cockpit tub in place.  Sliding the cockpit tub in from the open end is a bit tricky and really needs the seat to not be installed until the tub is glued into place.  Once the cockpit was in place, I glued the cockpit canopy on with Future Floor Finish and then masked the windows off.  You can tell how little of the cockpit is going to be visible in the pic below.  Everything that is clear will be painted, only the masked off windows will remain clear.

You can see the painted cockpit parts.
Now the cockpit and seat is in place.
Here you can see the installed canopy and masked off windows.

Next came some filling of areas of the fuselage that are not going to be used in this build.  Since X-15-1 was going to be built in the landed configuration I filled the mount hole with putty.

Forground is X-15-1 with mount hole being filled in. The back one is X-15-3 and I’ll be using the mount hole there.

After some checking I needed to drill the mount hole in X-15-3 out a bit at an angle so the mound rod can be inserted at an angle rather than straight up.  This will allow me to put it on the stand with a bit of a nose up direction.

Mount hole drilled out at an angle for the mounting rod.

I then glued the rear fuselage to the forward sections of both ships.  I then sanded the bottom of X-15-1 smooth and started work on X-15-3 and its flight surfaces.  The wings fit reasonably well if a bit loose, but the horizontal stabilizers were very sloppy and required work to make sure a good anhedral was maintained.  Two small holes on either side of the ventral fin will not be used.  They are for attaching the ground handling rig which will not be used in my build.

X-15-1 fuselage glued together.
X-15-3 wings and horizontal stabilizers glued on and unused holes filled.

At this point I decided to concentrate on X-15-3 and it’s details before continuing the work on X-15-1.  The build will continue in the next post.

Thanks for looking.  More to come.