Hi David,

In your initial post, I wasn't sure what this meant --> "I see someone is flying a1.24 model (.) weighing..."

In the US, assuming you're flying as a member of AMA, we have LTMA-1 and LTMA-2 permits the pilot can get, to fly in jet model weight classes of 55 to 77 lbs, and 77 to 100 lbs respectively. (ready to fly weights) I've been an AMA LMA signoff inspector for probably a decade. So in the US, we do have regulations in place - of course, no regulation will be perfect, and they'll never make everyone happy.

I admit I'm a bit ignorant on the UK or European rules regarding large model signoff procedures. I did check the BMFA website, but couldn't find anything regarding this. I also did a quick google search regarding the same for models in Europe, but also came up short. Can you or anyone else point me, where to look (for the UK or Europe rules)?

One thing is for sure... The model you speak of won't be flying in the Jet World Masters any time soon (20 kg dry weight limit)