My first capture was that the other plane under the wheels was confusing, i would place that plane somewhere els.
The sky looks like a sphere to much, the clouds kinda look cool, but it`s not there yet, to much warm collors, i would ad some cold ones above the red ones.
Now that i look closely you do have blue collors, but i just don`t notice it from my first impression.
Is that red an explosion? i would remove that red and change it to a more natural looking collor.
The plane looks super cool,
I would reduce the specularity. add a slight durt bump map to create fluctuation's in the metal.
To bad you had non reply`s, hope your still lurking around, and want to improve in your already cool creative scene.
Good luck, and keep posting.