Jump to content

Recommended Posts

Hello, everyone!

 

4W0s15l.png

 

Recently, I took a break from my usual space-faring missions to build a new VTOL dropship. The Hummingbyrd VTOL has four Panther engines which are mounted on hinges that allow the aircraft to alternate between VTOL and forward flight postures. The decision to use Panther engines was made because of their ability to make instantaneous thrust changes via the afterburners, which helps tremendously when landing. The engine housings use two sets of small internal docking ports with one of each offset to the other engine to allow for each set of engines to remain coupled despite no actual axle passing through the engine mount. The downward-facing payload bay contains an extendable crew bench, allowing for quick on-loading and off-loading of passengers. The crew capacity is 10: two pilot seats and 8 seats in the payload bay. The vessel is 119 parts.

 

ukc8Bsi.png

Notice the highlighted docking port in the far engine housing, as well as the corresponding un-highlighted port in the near housing. Both are attached to the opposite engine housing, but remain docked to the non-offset port in the same engine housing. This prevents flight/aerodynamic forces from causing asynchronous engine rotation, leading to unbalanced thrust and instability.

 

 

 

oSZdtdM.png

Shown above is the center of thrust, mass, and lift placement while in VTOL mode. While in this posture, all three are collinear in the dorsal-ventral axis. All tanks with fuel in them are laid out with symmetry front-to-back, allowing the C.O.M. to remain stationary regardless of fuel levels. This is critical for VTOL operations, as any significant deviation of the C.O.M. from the net thrust vector will cause a persistent pitch bias.

 

Shown below is the center of thrust, mass, and lift placement while in forward flight mode. While in this posture, the C.O.M. is offset forward of the center of lift due to the redistribution of engine mass, leading to improved stability while in forward flight. The rear engine set is offset above the longitudinal axis to the same extent that the forward engine set is offset below, allowing the net thrust vector to remain in line with the C.O.M.

OMYfnXo.png

 

Action Groups:


AG1) Toggle engine orientation

AG2) Toggle afterburners

AG3) Toggle landing gear

AG4) Toggle payload bay doors and piston lock

AG5) Toggle piston extension

 

Gallery:

FbgjtYU.pngUYBUEKp.pngQaqjhgl.png8MlhaQQ.pngpfdgAtO.pngSGwxCj5.png3W58fVa.pngciBHHpG.pngZHFmVC2.pngkKMPqV3.png4W0s15l.png

 

I hope you liked it! This ship is a joy to fly, and I highly recommend you try it out!

Craft file:
https://kerbalx.com/Jamie_Logan/Hummingbyrd

 

 

 

Also, Check out my last mission:

pAUojNQ.png

 

Edited by Jamie Logan
Link to post
Share on other sites
This thread is quite old. Please consider starting a new thread rather than reviving this one.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...