ChemDawg,
A collision is something that happens from time to time. It's annoying for both, but acceptable.
You should only apologise if you intentionally ram someone in a fighter with your C47 to protect the paratroops dropped from beeing shot down.
That, young man, is a very low thing to do, a gamey attitude and something to be really ashamed.
Other than this, it's an accident, nothing to apologise for.
Good luck and have fun,
<Salute>