Flyback Booster Engine Shuts Down

[BillL]

I was intrigued with SpaceX's flyback booster, so I attempted to build one myself. I built a two stage rocket, with Mechjeb installed on both stages.  I launch the vehicle and fly up about 30km and then disengage the ascent autopilot. I manually decouple the two stages. I then set SAS to prograde and fire the second stage engine. (just want it to go straight up and stay out of the way.) I switch control back to the first stage and enable Landing Guidance and set my target to KSC. (I have plenty of fuel.) The booster reorients itself and makes a boostback burn to get on the proper trajectory to land at KSC.  Reentry goes fine, it even makes a couple of correction burns, but when it comes to final descent, the engine does not reignite (I have plenty of fuel).  The engine still shows "Activated". I've even tried disabling Mechjeb and flying back manually and the engine still shuts down.  I've tried keeping a low throttle burn going all the way down and the engine still shuts down as the booster gets in the high  pressure region somewhere between 10km & 15km.  Any suggestions?

[Cpt Kerbalkrunch]

Welcome to the forums!

Are you saying the engine shuts down while burning, or that you've shut it down manually but now can't reignite it?

If it's the former, I'll take the risk of a stupid question and ask if this is a multi-tank booster. If so, any decouplers in the way that don't have crossfeed enabled? That would at least explain why a ship that has fuel still shuts down.

Best bet is a screenshot or craft file, though. They're guys on here that know pretty much everything about the game. I'm sure you'll get a good answer.

[Spricigo]

1 hour ago, BillL said:

(I have plenty of fuel.)

Including Electric Charge to 'fuel' your probecore?

 

[klesh]

2 hours ago, Spricigo said:

Including Electric Charge to 'fuel' your probecore?

 

My thought as well.  Presumably his engines dont have an alternator either.