DaveyJ576

Two LMs and extra fuel in one launch? Seriously impressive job of rigging there shipmate!

Do you have a visual representation of the S-IVC that you are referring to? What were the engines, J-2s?

I have kitbashed a Titan II first stage derived launcher for a side mounted X-15. I am still tweaking in the design, but I did successfully fly a Cape Canaveral to Wallops mission and put her down on land, just short of the runway. Am having a weird substantial pitch up transient just as the booster is running out of propellent and haven’t figured out why yet. Once I have it dialed in I will post pictures.

Nope! My download is four days old. Missed it by that much! LOL. Thanks.

@Zorg, for the Atlas LR-89 booster engine, you have two of the engine selections that are the same. There are two buttons for the NA3 version and none for the NA5. The LR-105 is okay. FYI.

Download from Github (see the original post on page one for the link), unzip, copy the Bluedog_DB folder that is in the Gamedata folder, paste it into your Gamedata folder. It is literally that easy. The most current dev version is the 1.14-Development branch. Be advised that some elements of that branch may not be finished. The full release is Master branch, which is also downloadable via CKAN, but you won’t have all of the newest stuff.

Thanks! Don’t sweat the message thing. If it is a pain don’t bother.

@Zorg, having a great time with the new Atlas parts! One question so far... the Atlas SCORE doesn't seem to have any attitude control once the engine cuts off, i.e. no reaction wheels. Is this intentional? I fly it to orbit using the classic Mechjeb profile and it will not maneuver to the node necessary to complete the burn to orbit. I added a set of reaction wheels and it works great. Also, how difficult would it be to add a nifty little message to display when you click the "Transmit Data" button? Perhaps a shortened version of Eisenhower's speech that it transmitted IRL? Thanks.

@Zorg, how will the new Atlas parts effect my existing Atlas craft files? Will the new stuff cause conflicts with my craft files? I have no problem deleting them as I enjoy the build process. Thanks.

TITAN 3A The Lincoln Laboratory at the Massachusetts Institute of Technology produced a series of communications test satellites in the mid to late 1960's. These craft were intended to test out techniques and technology for future military communications satellites, and thus the effort was sponsored by the U.S. Air Force. At about the time that the first two sats were being completed the Air Force was putting into service the Titan 3 program which was supposed to be a standardized, flexible, and low-cost space launch vehicle. The initial version was the Titan 3A, which consisted of a Titan II core vehicle structurally strengthened to handle the coming side mounted solid rocket boosters, topped by a new upper stage called the Transtage. The first two flights did not carry a payload and were intended to test the new Transtage third stage. The third flight carried the first Lincoln satellite, but it was not entirely successful due to a fault in the Star 13 kick motor attached to the satellite. On May 6, 1965 the fourth and final test flight of the Titan 3A took place from LC-20 at Cape Canaveral. Further flights of the 3A were not needed as the program was moving on to the SRM boosted Titan 3C. The payload for this mission was the second Lincoln Experimental Satellite (LES-2), and a simple radar calibration spacecraft, a reflective sphere named the Lincoln Calibration Satellite (LCS-1). Launch, liftoff, and the flight through staging went well. The Transtage inserted itself and the payload into a 1200 km parking orbit. After insertion into orbit, LCS-1 was released, followed shortly after by LES-2 and its Star 13 kick motor. The kick motor pushed LES-1 into an elliptical orbit where it extended its antennas and began its mission. LES-2 is long dead, but LCS-1 is the oldest spacecraft still in use, regularly being pinged by military defense radars so that they can be properly calibrated. My kitbash of the LES used a Coatl Toreka core, with stock solar panels and structural elements around it. I picked a variety of antennas to give it some functionality. Admittedly it is a bit bigger than real life, as I am not well versed in scaling. The LCS sphere is a Near Future tank with a radial decoupler attached to it, which was rather difficult to get in the right spot on the SAF fairing base. I love the utility of the Agena, but the Transtage is a handy little upper stage with a lot of capability, and it looks cool in its stubby way. All in all a fun build, showcasing a little-known Titan variant. Now, onto @Zorg's new Atlas stuff! Can't wait!

MERCURY JUPITER In the late afternoon of October 19, 1961, NASA launched the final suborbital mission of Project Mercury. Mercury Jupiter-2 was intended to put a Mercury spacecraft on a high speed, high altitude flight as a final test of the heatshield prior to the start of the orbital missions. Air Force Captain Michael Alfred Robert Sampson and his spacecraft "Delta 7" flew a highly successful mission, despite some minor technical issues that delayed the launch and resulted in a twilight splashdown 1450 miles downrange, 700 miles northeast of Puerto Rico. After clearing some issues with the booster, the Launch Director made the call for the late afternoon launch, clearing it with NASA HQ and the Navy recovery forces. The launch and ride up hill went without a hitch. The spacecraft separated from the Jupiter booster on time, with the posigrade rockets pushing it clear. Sampson immediately rotated to retrograde and conducted a goo experiment. He had a beautiful view of the Atlantic and the northern Caribbean islands through the periscope as they passed below. Retrofire occurred 30 seconds prior to apoapsis, with the maximum altitude reached being 149 km. A clean separation of the retro package occurred and Sampson endured a crushing 9.5 Gs for a few seconds as the spacecraft entered the thickest part of the atmosphere. Twilight over the Atlantic provided a beautiful backdrop as the drogue stabilized the falling Delta 7. A HSS-1 Seabat helicopter from the USS Lake Champlain captured a memorable photo of Delta 7 descending under her main parachute, with the landing bag fully deployed. The antenna fairing can be seen in the background, coming down under the now discarded drogue chute. Everyone at the Space Task Group, NASA, and the astronaut corps was very happy with the flight and were looking forward to the orbital flights with the Atlas.

Very impressive work @Zorg. Really looking forward to this. @Friznit, looks like you have some work here for the Wiki, but for a good reason!

I have flown hundreds of Gemini missions with the BDB heatshield with no issues. Could you be more specific as to what you are doing?

If you like that one, try the space shuttle set. Imagine Hypersonic multiplied by three! It is mind blowing!

For those of you interested in the X-15 (who isn’t???), I can highly recommend the book Hypersonic: The Story of the North American X-15 by Dennis R. Jenkins and Tony Landis. It is THE authoritative reference to the aircraft and program, no other book on the subject is necessary, except perhaps for their companion book, the X-15 Photo Scrapbook, a collection of photographs that they weren’t able to fit into the book. Both books are out of print, but copies can be found for reasonable prices. Jenkins is also the author of the three volume magnum opus Space Shuttle: Developing an Icon 1972-2013. The X-15 book has an exhausting amount of detail, but is well written and readable.

I believe that 4g was picked for booster skirt sep because that is an authoritative structural limit for payloads. Anything higher than that and you risk damaging your satellite, or your living pilot. Admittedly, Al Shepard withstood 6.3g going uphill and 11g for a short period on reentry on MR-3, but both peaks lasted just a few seconds, and he was barely functional during those times. Sustained 4g is something else altogether.

I agree about PVG. If you set the orbital parameters too low for the power of your rocket, PVG does some weird stuff, like excessive pitch down and nearly horizontal flight at 20km. I use classic ascent and have no issues getting to orbit on 2.5x KSRSS with the BDB Mercury Atlas. I have found over literally hundreds of launch attempts that MechJeb PVG has two pitch maneuvers during first stage flight on the ride uphill. The first one is shortly after leaving the pad based on your inputs. The second will come higher up, typically in the 15-25km range. If the 2nd pitch maneuver is excessive, resulting in nearly horizontal flight or actual below horizon flight, your apoapsis (aka apogee) parameter is too low for your rocket. I saw this a lot while developing an Excel spreadsheet for optimal launch profiles for the BDB Saturn IB. I set the Atlas booster jettison at 4g for nearly every flight and I get acceptable performance. @Friznit has a table of Atlas performance on his BDB Wiki if you want truly dialed in performance.

Actually, the Navaho booster looks a lot like a Soyuz strap-on booster.

I don’t know of any way other to describe it. The RCS fires and shuts off very rapidly, several times a second, in different directions, in such a way that it nulls out any motion. I can move the spacecraft manually, even with MP engaged, but the stuttering continues and the spacecraft does not move to the required position for the burn. These are all BDB spacecraft, so the RCS config is balanced.

I am using 2.14.3.0. The problem is intermittent, it doesn’t always occur, and not always on the same Maneuver Planner burn. Sometimes, with MP engaged, I can manually move the spacecraft to the correct attitude and the main burn will occur. The RCS stutter is such that the spacecraft doesn’t move under the guidance of MP. Weird. Is this a bug? Should I uninstall MechJeb and reinstall?

I apologize if this has already been asked and answered. I will ask now because I wasn’t sure how to describe the problem. With a spacecraft in orbit I try to execute a maneuver using Maneuver Planner. MP will calculate the node and the delta v needed correctly, but when I click on “execute node”, the RCS on my spacecraft begins to “stutter”, firing on and of very rapidly and not moving the spacecraft to the correct burn attitude. I will have MP engage warp to move forward to the node, but nothing happens other than the RCS stutter, burning up my monoprop. Killing the maneuver and clearing the node stops it and I have full control back. Reengaging MP does the same thing. The problem is intermittent. Any clues on how to clear this? I may not have described this thoroughly enough. Please ask me a question if I have been unclear. Thank you.

The current Saturn I fins work too.

JUMPSEAT By the mid to late 1970's the omnipresent need to monitor Soviet radars and communications lead the United States to greatly expand the capabilities of their Signals Intelligence (SIGINT), Communications Intelligence (COMINT), and Electronic Intelligence (ELINT) satellites. These needs moved beyond the capabilities of the Heavy Ferret, Multigroup, and Strawman series of birds. The result was code-named Jumpseat (don't you love those Cold War era codenames? ) The program is still mostly classified so very little hard info is available, but what various sources can agree on is that it moved away from the earlier Agena based spacecraft and used the Hughes HS-318 satellite bus, very similar to the preceding TACSAT. It also likely had a very large unfurlable antenna. It would combine several mission capabilities into one satellite and would monitor Soviet early warning missile radars, it would intercept line-of-sight microwave communications, and intercept up and down links from Soviet comms satellites. The launch vehicle would be the rather mysterious Titan 33B and 34B Agena D with a very long payload shroud that covered both the Agena and the Jumpseat spacecraft. The launch was from Vandenberg and the spacecraft went into a highly elliptical orbit so that the spacecraft would spend a long period over the planet's northern regions. The launch went well and the Agena reignited over the South Pole to put the Jumpseat into a 130 x 1000 km orbit with the high point over the North Pole. The spacecraft was successfully deployed and unfurled its antennas to begin its mission. Much useful data was recovered... I used the BDB TACSAT bus and the Strawman SIGINT package. The large antenna is from Space Dust and the middle structure is Stock parts with a BDB Ranger bus and Nimbus antenna. I added a couple of extra antennas for visual effect. This configuration is highly speculative, as there are no publicly available pictures of Jumpseat, only some informed speculation. It is very possible that the large antenna was mounted axially on the centerline of the bus and unfurled in a manner similar to how the Galileo Jupiter probe antenna unfolded. There is a Stock antenna that does that, but the original size is small so when you Tweakscale it up it just didn't look right. With all of that said, I think this is a reasonable representation. One lesson learned... this configuration needs plenty of battery power in order to be able to transmit the SIGINT data without running out of power.

I was thinking Brownsville to the Cape, or the Cape to Wallops for a flight path. That way you could dump the booster in the drink. I have Johnston Island in my KSRSS mod, so possibly from there to Vandenberg.

Yes, something like the SM-64 Navaho cruise missile, except with the X-15 as the payload. Edit… Wow, that was actually proposed! Google “X-15 on Navaho”. Pretty cool.