I’m trying to do the impossible by Launch a “Cargo Bay Launch Vehicle”? Help Needed

[Turk_WLF]

I love the idea of using Cargo Bays to deliver items into space however one of the things I haven’t master in KSP is how to landing a plane on the runway.

Therefore I come up with the idea of using the MK 3 Cargo Bays on a usable Launch Vehicle, but I’m having problem with the Rocket cartwheel Engines over Nose. I understand that the rocket is nose heavy with the Cargo Bay near the top & the Fuel Tanks close to the bottom.

Here is my General Design Idea (Starting from the Top down) (Just using RealChutes, MechJeb & Stock Items)

A Cone double chute, stack chute (from RealChutes), Rockomax Brand Adapter with 8 radial chutes (from RealChutes), Z-4K Rechargeable Battery Bank, Mk3 to 2.5m Adapter, MechJeb, RC-L01 Remote Guidance Unit, Mk3 Monopropellant Tank with (4) RV-105 RCS Thruster Blocks 1 per side, Mk3 Cargo Bay CRG-25, Mk3 Cargo Bay CRG-50, Mk3 Monopropellant Tank with (4) RV-105 RCS Thruster Blocks 1 per side, Mk3 to 3.75m Adapter, Heat Shield (3.75m), TR-38-D Decoupler, Kerbodyne S3-7200 Tank, Kerbodyne KR-2L+ "Rhino" Liquid Fuel Engine, TR-38-D Decoupler, Kerbodyne S3-14400 Tank, S3 KS-25x4 "Mammoth" Liquid Fuel Engine.

This setup doesn’t have enough Delta-Vees to get to orbit.

I’m looking for design ideas if this is possible, I can’t make a cargo bay rocket that doesn’t cartwheel out of control or get to orbit.

Is this an impossible goal that I can’t reach within the KSP 1.1.3?

 

Thanks,

[Leftotian]

General advice is: throw all monoprop into garbage because you have no use for it, move all fuel tanks up as much as you can, then just keep adding wings at the bottom untill it's stable enough to not flip over. 

[Reactordrone]

That should have enough delta-v to get into orbit. I recreated it without the real chute parts, ditched one of the monoprop tanks and got a 30t test mass into orbit with no control issues going up or coming down. I'm assuming the fuel in the reusable section was meant for consumption by the Rhino rather than as payload. I'm not sure this will be economically worthwhile since you're ditching the most expensive parts to return empty fuel tanks and cargo bays.

 

ETA- Thrust to weight ratio on the pad is reasonably high so you can do a fairly aggressive push over (10°) just off the launch pad which might help.

Edited August 4, 2016 by Reactordrone

[Spricigo]

If you feel you long and slim craft it's too flipy maybe you should try something shorter  and wider.  On the plus side you can make it cheaper,  on the minus side drag increase.

On the top of my mind:

Same design until the first decoupler (I have no idea why so many monopropelant,  hope you do),  TR-38-D Decoupler, Kerbodyne S3-3600 Tank, S3 KS-25x4 "Mammoth" Liquid Fuel Engine, 2x (TT-70 Radial Decoupler, Rockomax jumbo-64 fuel tank, FTX-2 External Fuel Duct). Struts and control surface as you see fit. 

If that works the next iteration may be turning the whole thing a true SSTOB (B stands for back).  Get rid of decouplers, place the heat-sensitive parts out of the airstream and find the reentry procedure that works to this thing.