Hazza_Rockets
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- Oct 5, 2020
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Hi, I have a g80 motor for my apogee aspire and want to shorten the delay time from 14 sec to 10, can I do this without the proper tool.
Thanks,
Harry
Thanks,
Harry
**Include the tip of the drill!** The reduction is to the **deepest** part of the hole. Some Aerotech delays use a slower delay material (usually Black Jack) and it requires less than 1/32" to reduce the delay by 1 second. Not sure about CTI delays.Yes. Using a 1/4” drill bit, for every 1/32” you remove will reduce delay by 1 second.
Thanks for your help.You need to remove ~4/32" of delay. The tool is one of the least imprecise ways to do that, but a bit that fits and is tapestopped can get the job done.
What kind of reinforcement did you do to the Aspire to help it withstand those kinds of speeds? :-D
Okay thank you very much for your advice, I will not change the delayI would NOT shorten delay. With a steamer rather than chute it will not matter.
if late deploy there will not be a shock load on rocket
Of course you can, Use a small drill bit, double check the depth of the hole with a tire tread depth gauge. They are calibrated in 32nd's of an inch.Hi, I have a g80 motor for my apogee aspire and want to shorten the delay time from 14 sec to 10, can I do this without the proper tool.
Thanks,
Harry
what a good idea.Of course you can, Use a small drill bit, double check the depth of the hole with a tire tread depth gauge. They are calibrated in 32nd's of an inch.
Hi, I'm 13 so I have pretty good eyes. I also have many other people viewing so I'll have plenty eyes. I'm launching it in a large farm in New Zealand so I have plenty of room as well as access to farm quads and motorbikes. I also have access to a large drone (matrice 210rtk) so I can also get an aerial view. I hope I find it because I want to try it on an f (I dont no why I'm doing a g first, probably cause all I want is to achieve supersonic).How old are you? Not being nosy, but my eyes have gotten noticeably worse as I age. You NEED a kid or 5 with good eyes to follow/spot this rocket. A friend of mine launched an Aspire at a club launch years ago. We (mostly 40 and 50 year old guys) never saw it again.
Good luck. I supervised a team of Aerospace Engineering seniors that hit Mach 1.42 with am F80, amd Mach 1.1 with an E50. We flew from a farm at night to photograph the exhaust trail. We launched several rockets with different slightly different designs. Some rockets were actually recovered the next day. At the time there were no good contest certified model rocket G motors, although the G60(?) could have carried electronic instrumentation to low supersonic speed. A G80 would be interesting.Hi, I'm 13 so I have pretty good eyes. I also have many other people viewing so I'll have plenty eyes. I'm launching it in a large farm in New Zealand so I have plenty of room as well as access to farm quads and motorbikes. I also have access to a large drone (matrice 210rtk) so I can also get an aerial view. I hope I find it because I want to try it on an f (I dont no why I'm doing a g first, probably cause all I want is to achieve supersonic).
I will launch in the next week or two, I'll keep you updated
Back in the early 90's we used drill bits for shortening delays. At a launch, I once used a pocket knife to get the job done. As long as you get the depth correct, the tool itself matters less.
Putting your name and contact information somewhere on the rocket is a pretty good idea too. There have been a few times I wish I had done it. Attached to the shock cord lets it be seen easily after the rocket lands who knows where, but doesn't mess up the look before launch.Hi, I'm 13 so I have pretty good eyes. I also have many other people viewing so I'll have plenty eyes. I'm launching it in a large farm in New Zealand so I have plenty of room as well as access to farm quads and motorbikes. I also have access to a large drone (matrice 210rtk) so I can also get an aerial view. I hope I find it because I want to try it on an f (I dont no why I'm doing a g first, probably cause all I want is to achieve supersonic).
I will launch in the next week or two, I'll keep you updated
Putting your name and contact information somewhere on the rocket is a pretty good idea too. There have been a few time I wish I had done it. Attached to the shock cord lets it be seen easily after the rocket lands who knows where, but doesn't mess up the look before launch.
Not if it's still on the way up.
Deployment can come a little before apogee or a little after Too far off in either direction means high speed deployment and damage. A little early can mean successful recovery from less total height than a little late.
most likely reason because it won't fit.Frankly, I'm surprised that no one suggested a chute release . . .
Good luck. I supervised a team of Aerospace Engineering seniors that hit Mach 1.42 with am F80, amd Mach 1.1 with an E50. We flew from a farm at night to photograph the exhaust trail. We launched several rockets with different slightly different designs. Some rockets were actually recovered the next day. At the time there were no good contest certified model rocket G motors, although the G60(?) could have carried electronic instrumentation to low supersonic speed. A G80 would be interesting.
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