#1
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Rockets for C6-5 on small fields
C6-5s are the engines with the widest retail availability, but also have a reputation for putting small rockets "into orbit" which doesn't work well on small fields.
Wondering what kinds of designs strategies could lead to safe and recoverable C6-5 flights in smaller fields. - Extra weight in the nose cone? Getting close to max lift weight would seem to limit altitude. What determines maximum lift weight anyway - acceleration to fin effective speed by the time it leaves the launch rod? Would a longer launch rod help? - Draggy designs? Since drag is related to airspeed, this would seem to still permit reasonable acceleration to fin-effective speed on the launch rod, but limit maximum speed an altitude thereafter. - Undersized recovery systems are an obvious one... better to have to re-glue a broken fin or two than replace a model that drifts into a tall tree. |
#2
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Quote:
Two words, Big Bertha!
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"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run" http://sandmandecals.com/ |
#3
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I've launched a Nike-X and Honest John in a 5 acre field with good results. Only bad recovery was the upper winds were stronger than on the ground one time.
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#4
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Quote:
Quote:
I'll second his recommendation, and add a few others:
Larger-body designs tend to work well, and when combined with either several 2" x 20" streamers, or a standard 12" parachute, should recover well inside a moderately-sized schoolyard.
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 |
#5
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Flying saucers.
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"AND I hope they are from the planet of the "Chunk spunky Mary-Lou Retton clones". - Ironnerd "Those who trade liberty for security have neither" - Benjamin Franklin "Semroc is almost always the answer" - Stefanj www.paulsavia.com www.soundclick.com/paulsavia |
#6
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I agree with the earlier posts. BT-60 sized rockets around two feet tall are perfect for smaller fields.
Many of the models I've produced were designed with small fields in mind. I hate to lose rockets. Check out the Break-Away model. http://www.oddlrockets.com/KitsPage2.html Scroll down to the lower left. It launches vertically, and breaks apart into six tethered pieces at ejection. It'll get more altitude than a Bertha style rocket, and your spectators will get a surprise recovery. It falls horizontally with very little drift.
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Hans "Chris" Michielssen Old/New NAR # 19086 SR www.oddlrockets.com www.modelrocketbuilding.blogspot.com http://www.nar.org/educational-reso...ing-techniques/ Your results may vary "Nose cones roll, be careful with that." Every spaceman needs a ray gun. Look out - I'm the Meister Shyster! |
#7
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Sandman got it in one.
The Big Bertha is the ticket and widely available. Der Big Red Max is no longer available but if you really want one you can buy a regular Red Max for the nosecone/fins/decal sheet and a Big Bertha for everything else. Or if you have sufficient spare parts you can clone one and get your decals from Sandman. The Blue Max set should work just fine. I'm thinking about building another Big Red Max and this time going with a 24mm motor mount but that's another story.
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Kit (aka Cranky Kong) I'm just a roadie for the banned... |
#8
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Thanks for the ideas... one characteristic of my BAR-dom is a decision not to buy any kits, so it's more look at this plan and look at that plan and grab appealing features.
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#9
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What about a B6-4?
Greg |
#10
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He stated it's easier to get C6-5's in his area in the original post.
__________________
"AND I hope they are from the planet of the "Chunk spunky Mary-Lou Retton clones". - Ironnerd "Those who trade liberty for security have neither" - Benjamin Franklin "Semroc is almost always the answer" - Stefanj www.paulsavia.com www.soundclick.com/paulsavia |
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