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Timothy, i have a copy i can lend you. i just sent you a PM.

Thanks Antares.

The TRF App on my iPhone stopped working a few days ago. I tried deleting and reloading the app, but it still wont work. Obviously, i can still access TRF on my computer. Is anyone else having this issue? Any ideas on how to fix it?

Here is an OpenRocket file I made from measurements.

PM sent for the 54mm aluminum tube.

Thanks to the URRF crew for putting on a great event. Because of the efficient operation, I got three launches up in one day.

I’m selling a CTI J285-15A Classic reload. I bought it last year and the igniter is not included. Price is $50. I will be at URRF this weekend and you can pick it up at the event. We can arrange pickup and payment at the event to the first “I’ll take it”

I consider my router table to be the most dangerous tool in my shop.

The setup in the above picture seems unsafe to me. I agree that you need to push the workpiece counter to the direction of the cutting or grinding bit. That way your hands are ‘downstream’ of the router bit. But how do you hold the workpiece (fin) once it is half way through? Seems to me you...

I’ve had one of these rotary switches fail during ground testing. And have heard of other reliability issues for this switch on this forum. If you decide on this switch, solder the battery + lead to terminals 2 AND 3. And solder the load to terminals 1 AND 4. That way, you have a redundant...

PM sent.

That was fast.

For sale is an Aero Pack 75P tailcone motor retainer assembly. Fits a 3.125” OD MMT in a 4” rocket. This is unused and includes instructions. $39 includes shipping.

For sale, a once used P38-3G case. Clean on the inside and no damage. Storage case included. I’ve moved to EX motors and don’t need it any more. $32 shipped.

Thanks. I’ll just keep flying my MD screamers with the understanding of what factors can mitigate fin flutter.

I also did some manual calculations for the rockets I fly and most are well into the fin flutter regime. They always come back OK. So what is the conclusion I should draw from this? It can’t be ‘avoid any fin flutter’, since as Andrew ASC says, vendors sell kits that way and mine seem to...

PM sent

I’ll Take it

This happened to me on my first Eggfinder build. Not sure what happened, but I suspect that a microscopic filing or copper strand got lodged under the RF module component or PCB. I put a piece of masking tape over subsequent units to protect from conductive FOD. Haven’t had a problem since.

I see the problem as people thinking that a cert flight is different than any other project (it’s fundamentally not) Yes, safety is everyone’s concern, and if the person is doing something unsafe, then people should speak up. But, really, what is the difference if the OP certs on a BDR & a 1%M...