4" Tubes from Container Store for HPR

[mccordmw]

I just spotted this beauty.

https://www.containerstore.com/s/telescoping-mailing-tubes/d?productId=10008393&q=mailing

A 3'7" x 4" tube that looks like it's glassine wrapped AND includes an inner tube that can be used as a coupler or to double-wall the tube for even more strength. All that for $6?

Anyone tried this for 4" HPR airframes? I'm so tempted to get this for my next build.

 

[rstaff3]

Those are my favorites! These tubes are not as robust as, say LOC tubing, but work great. I've used the full length stuffer for both couplers and reinforcement. I rebuilt a 4" phenolic rocket that shattered with them. Flies on H's and I's. Built many MPRs with the 4" and 3" tubes. These also fly on H's too.

The other thing I've liked to do use the couper stock for ring fins. Standard 6 fins around a longer section of coupler. When inserted into the outer tube you get rings whose ID is flush with the outer tube.

 

[ksaves2]

My only question is do standard polypropylene nosecones fit with little or no modification?

Hmmmmm, tried to order but they don't ship. Kurt

 

[rstaff3]

The fit well enough for me.

 

[mccordmw]

What do you think? LOC 3.9 to fit? Which ones have fit?

 

[rstaff3]

On my 4"ers I have used cones that came from Rocketman and DG&A. The fit is not perfect, but they work.

 

[dhbarr]

My only question is do standard polypropylene nosecones fit with little or no modification?

Hmmmmm, tried to order but they don't ship. Kurt

Cut the tube for a Lubbo-style nose... I think I just found the cheapest possible 4" rocket

 

[cavecentral]

Use the flat, metal-tipped nose cone they come with! Would be a bit draggy, but that just means as shorter walk .

 

[fyrwrxz]

LMAO! Perfect solution!