Quantcast

Ejection cap?

The Rocketry Forum

Help Support The Rocketry Forum:

qquake2k

Captain Low-N-Slow
Joined
Jan 26, 2010
Messages
13,573
Reaction score
35
In all the 29mm and 38mm Aerotech reloads I've ever gotten, there is a large red cap that fits over the forward closure. I'm assuming it is designed to be used in lieu of the tape disc to contain the BP charge. But it fits very tight, and I've always been afraid to use them. I've always used the included tape disc, and masking tape. Has anyone ever used the cap? Any problems?

ejection_cap01.jpg


ejection_cap02.jpg
 

crossfire

Lifetime Supporter
TRF Lifetime Supporter
Joined
Jan 16, 2011
Messages
4,518
Reaction score
528
Is that the nozzle cap?
 

Handeman

Well-Known Member
TRF Supporter
Joined
Jan 18, 2009
Messages
7,766
Reaction score
363
Location
Stafford, VA
I use the cap all the time. That includes when I use a 29mm HPR in my PML Callisto with piston ejection. I only use 5g of powder in it so the piston doesn't push everything off too hard. The cap works fine even with only the 5g of powder.

I don't use powder in my DD rockets so I've collected some extra caps. Hold on to them. The AT reloads that come in the yellow tubes instead of the plastic bags, don't have the plastic cap. I've been using the caps in the reloads I got in the tubes. IIRC AT is going to start including the caps in the reloads in the tubes too, but there are still a lot in the supply line and I haven't gotten one yet.
 

qquake2k

Captain Low-N-Slow
Joined
Jan 26, 2010
Messages
13,573
Reaction score
35
This cap was in an H165 reload packed in a yellow tube.
 

T-Rex

Ordinary Average Guy
TRF Supporter
Joined
Jul 22, 2011
Messages
2,996
Reaction score
48
I use them when I can and have never had a problem. Being slightly paranoid, most of the time I am adding an extra helping of BP so I end up using tape.
 

Steve Shannon

Well-Known Member
TRF Supporter
Joined
Jul 23, 2011
Messages
6,577
Reaction score
3,374
Location
Butte, Montana
I use them every time. I put the paper disk on first (but they never stick long) then the plastic cap.
 

rms

Well-Known Member
Joined
Feb 3, 2009
Messages
353
Reaction score
0
In all the 29mm and 38mm Aerotech reloads I've ever gotten, there is a large red cap that fits over the forward closure. I'm assuming it is designed to be used in lieu of the tape disc to contain the BP charge. But it fits very tight, and I've always been afraid to use them. I've always used the included tape disc, and masking tape. Has anyone ever used the cap? Any problems?
Have been afraid to use these because they are very tight preventing them from coming off with the ejection charge? That isn't an issue, they will blow off or blow the face off the cap every time if the charge goes off.
Greg
 

Buckeye

Well-Known Member
TRF Supporter
Joined
Sep 6, 2009
Messages
2,611
Reaction score
463
I had the same concerns, but they work just fine.

http://www.rocketryforum.com/showthread.php?132676-Aerotech-RMS-ejection-caps

Yes, hang on to them because you never know what jumble of parts and incorrect instructions you will get when you open your next Aerotech reload. They are like a box of chocolates.....

The bigger red caps are also handy little trays for holding shear pins or rivets in my range box!
 
Top