When did V1, VR, and speed bugs come into use?

[JammedStab]

Originally Posted by Centaurus

Now Boeing use two white index moveable bugs and squeeze them together in order to depict Vref. The two white index pointers when squeezed together are supposed to average Vref. I prefer that Vref be depicted by one white index pointer personally. Not very good IMHO..

Don't think that was done on the 727. We didn't anyways.