Following is a video showing the proof of concept of hanging the FX Radar Chronograph off the end of an airgun barrel to get accurate readings. I previously made a video where I showed that the placement of the chronograph is very finicky. Very slight changes in barrel alignment result in untrustworthy readings or missed readings altogether.
Copying an idea by Steve Allen of Airgunology, I made a bracket out of cardboard to hang the chrony on my barrel. I am pleased to say that doing so solved all my issues. The unit is now consistent, easier to set up, and no longer misses readings! The readings are now reliable as long as whatever you use to hold the chony keeps it from wobbling or sliding around as the barrel moves.
Using my trusty Caldwell Chrony, I tuned my Taipan Veteran Long to shoot a variety of different mass pellets at 900 fps. In this video I retest the tune of the gun using the FX chrony and get stellar results. Check it out.
https://youtu.be/XFwZnfji7N8
Glad to see you are still testing the FX unit. Considering what you had identified with your initial testing of this unit (and it was very well done IMO), my question at this point would be does the ideal position change from gun to gun or condition to condition. In other words, would a person need a good regular chronograph to use to verify WHERE to put the FX unit or can you reliably say something like 2" below and 4" behind muzzle for all guns? I can see how mounting it on the barrel could make it read more consistently but are you now fully confident that simply mounting it on the barrel in the area as shown will make it both consistent AND accurate across multiple guns?
The most inconsistency I saw with the placement of the FX chrony is parallelism to the bore and being far below the barrel (5+ inches) which is an issue only with a tripod placement. I have now used the rubber band method for the past 2 weeks and had good results and repeatability. I was also skeptical at first at the accuracy especially when I looked at the returned results statistically. The chrony seemed to create bimodal groups of speed and the speed variance was odd. That all went away when I started to attach the chrony directly to the barrel of my FX Crown Cont.
Also this is my first chrony I have bought for a long time (since 1992) when I still lived oversees, so it wasn't an issue with the investment, but I agree if you already have a working setup putting down 200 doesn't work for everyone. I do have to say though it being this small and it actually being most accurate attached to the barrel it is like a built in chrony that doesn't need a lot of setup.
