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Great stuff! Thanks for responding. I didn't join TRF until 2015, so never saw this. Will do a search...

I thought the EZI preceded the I-Roc but wasn't sure of the history - thanks for confirming, and for the background story. I like the look of it but I have yet to see one this side of the pond.

I don't know which came first, but I'm guessing the I-Roc's a kind of fatter, smaller field variant of the EZI-65, built for high thrust 38s rather than longer burn 54s.

Very nice work - love the chunky shape! How did you construct the tail cone?

Welcome to the Forum. You're correct in saying not many UK rocketeers post here regularly, but alot read the forum. Good luck with your proposed flight it looks very interesting. A few points in relation to your post: (i) UK regulations (both legal and insurance) are not that much different from...

This ^^. There are Jayhawks, then there's rfjustin's Jayhawk..😊

Making your own solid rocket propellant (what is termed 'EX' here on TRF) is illegal for private individuals in the UK. I would not advise trying to 'work around' any law. If you or other students wish to work with a licensed commercial company producing propellants, work with your university...

@rharshberger Interested to know where this idea came from...? All the current launch sites in use by UK clubs are private farmland. UKRA affiliated clubs have arrangements with whichever farmer owns the arable or grazing land we launch on. Many years ago there was a club based at an airfield...

EARS (East Anglian Rocketry Society) (www.ears.org.uk) can accommodate flights over 5K - I've flown to 7772' there. However the agreement EARS has with the CAA requires advance planning, so you must contact the committee at least 4 weeks in advance - do not simply turn up without prior...

@scschulte My apologies I only just saw your thread /question. In the past year (2023) I have flown CTI 4G K445, K454 and K400 without problems. I understand that other fliers on this forum seem to report more or less continuous problems with Cesaroni motors, particularly Pro54s. Why they...

Looks great! Any decision on maiden flight motor?

"More showed it to me and then I bought it." Yep...that's how they do it. Sometimes not even that. A while ago there was a CTI K454 at the bottom of a box in the back of my club vendor's van. I don't fly sparkies, never have. Least of all a 54mm 4 grain. But he allowed me to root around in the...

Is the black one actually CF or just black FWFG to match the airframe..? Absolutely awesome project - will be following from afar, agog..😊

I don't tap my shear pin holes, and I do use nylon screws and blue painters tape in the manner you describe. But I have seen (onboard camera) the slipstream rip the tape off during flight, and pull the pin with it. Obviously there should be more than one pin anyway, but it did give me food for...

Nice!

Magnificent pics, another awesome @rfjustin build and flight. Congrats and thanks for posting. Any altitude data?

Interesting idea. Never done it myself but if you search Jerry O'Sullivan's superb 'Two Stage Iris sounding rocket LDRS 31' you will see he used a similar removable fin system using aluminium angle. He has posted here and on Youtube as 'vahpr'. Admittedly his seems to be a kind of surface...

With a bit of careful measuring and maybe a small pilot hole it should be possible to locate where the CRs are located inside the airframe. Failing that, use Acme conformal rail guides (which don't require any drilling) bonded with JB Weld.

Thanks!