Quote from the screenshot sticky:

"1. Use JPG's only 
2. Keep each image within 800 pixels wide 
3. Keep each image within 100K
4. 500kb MAXIMUM LIMIT PER POST!!    Example: 5 shots at 65kb each = 325kb. Well under 500kb!!
5. ABSOLOUTLEY NO LINKED IMAGES from an outside site!! This is STRICTLY ENFORCED!!


You can use an image editor such as Irfanview to resize & edit filesize. There is NO reason for any image to be over 60-100K. The resolution difference is barely noticeable if you use a good editor to reduce filesize. If your image does not meet the above requirements, it will be deleted.
An easy way to follow these directions is to print this page then follow it step by step."

I'd say that's a 'no'...

you can post links - put don't hot link. So for example like this:
http://www.aircraft-info.net/aircraft/jet_aircraft/airbus/A380/a380_04.jpg