# Dirt cheap hemispherical chutes

### Help Support The Rocketry Forum:

#### Wallace

##### Well-Known Member
Made mention of this in hpr and didn't seem to get much attention. ...Occurred to me it might be more at home in scratch built.

#### AfterBurners

##### Well-Known Member
how heavy is the material?

#### Wallace

##### Well-Known Member
Some assembly required. ..

Testing...

#### Attachments

• 19.4 KB Views: 28

#### Wallace

##### Well-Known Member
In action. Not bad for a little over 5 bucks....

#### Attachments

• 14.3 KB Views: 29

#### Wallace

##### Well-Known Member
how heavy is the material?
The entire canopy w/the plastic caps sewn on the ends is 2.7 ounces. I suspect it's around 1.1 ounce material...BTW, they also have 'em in all black if you're so inclined.

#### Wallace

##### Well-Known Member
Also forgot to mention....The CD has to be pretty damn good, that,s a 41 ounce rocket on a 27" chute w/3" spill hole. Took several landings of soft ground w/out damage.

#### Wallace

##### Well-Known Member
This is as landed...

#### Attachments

• 176.9 KB Views: 27

#### Scott231

##### Well-Known Member
Why, in the second picture, did you take a pair of scissors and cut out the inner 30"?

#### Sooner Boomer

##### Well-Known Member
Why, in the second picture, did you take a pair of scissors and cut out the inner 30"?
Spill hole...really, really big spill hole :wink:

#### Wallace

##### Well-Known Member
You are serious? There is no mention of and a fair warning against scissor or anything but a hot knife. Secondly, I was cutting out a 30" chute since I have no need for a 60"er. Maybe read the text and spend less time with the pictograms?

#### Wallace

##### Well-Known Member
Although it is mostly.....Pics.

#### CORZERO

##### Well-Known Member
Very creative! Time to check my local Home Depot...

#### Rktman

##### Eric
TRF Supporter
Really clever idea to repurpose an umbrella! I've heard of using tablecloths but this is already in the right shape and with the perfect color pattern to boot.

#### GlenP

##### Well-Known Member
sounds like this would be a great idea to start your own chute company,
or perhaps an umbrella corporation

#### TheTellurian

##### In space no one can hear you fart
Been doing that for a while. One mod I made is to change the shape by adding darts [the sewing kind] or little triangles sewn above the shroud lines to change the shape if I thought the brolly chute [my name for them] was too flat.

Richard

#### Sooner Boomer

##### Well-Known Member
sounds like this would be a great idea to start your own chute company,
or perhaps an umbrella corporation

Yeah, you could call it "BumberChutes".

#### neil_w

##### Marginally Stable
TRF Supporter
Yeah, you could call it "BumberChutes".
You win the forum for today.

#### soopirV

##### Well-Known Member
You are serious? There is no mention of and a fair warning against scissor or anything but a hot knife. Secondly, I was cutting out a 30" chute since I have no need for a 60"er. Maybe read the text and spend less time with the pictograms?
These are pretty aggressive replies when there IS no text to reference...

#### Wallace

##### Well-Known Member
Agreed; Hence the follow up concerning lack of said text.

#### Wallace

##### Well-Known Member
Original intent was to keep it "Estes simple". Won't happen again.

#### soopirV

##### Well-Known Member
Agreed; Hence the follow up concerning lack of said text.
Oh, you mean this?
"Although it is mostly.....Pics."

"Mostly" is a very generous description since there is LITERALLY no text. I like your ingenuity, and want to learn from you, so maybe you can revisit this obviously helpful post with some more documentation? I get that it's a weller soldering gun, used as a hot knife. Not unheard of, but which tip did you use (or how did you modify/create a tip)? What is that thread? How do we find similar? Any tips on attachment to make shroud lines? What have you learned from your discovery that you may do differently next time? Details like this are what make forums like this functional, and your idea is definitely worth documentation so it can live on!

#### Wallace

##### Well-Known Member
Forgot to add.....\$4 @ Wal Mart. Strong stuff. 150 yards will make alotta chutes.
Sewing section @ WalMart. Now am I correct at least in quoting MY previous text, or am I misquoting?Kind of thought the pics of the actual products/stores/labels and pricing might possibly be somewhat helpful. BTW, that is a Weller soldering gun with a flat blade tip being used as a hot knife, although any tip woud work just as well, I would suggest not using one you intend to solder with after since the melted nylon has a tendency to fowl said.

#### Wallace

##### Well-Known Member
Been doing that for a while. One mod I made is to change the shape by adding darts [the sewing kind] or little triangles sewn above the shroud lines to change the shape if I thought the brolly chute [my name for them] was too flat.

Richard
Any pics of these "Darts"? Sounds intriguing.. Been trying to talk the GF into making a ringsail for me but that's not looking very promising. If my lack of sewing skills/patience ever improves I might just attempt it myself.

#### Wallace

##### Well-Known Member
This particular chute survived a shred on an I205 @ what my Quantum claims to be 1068 fps. Open rocket is real close to sim. Chute itself appears unscathed. .

#### TheTellurian

##### In space no one can hear you fart
Any pics of these "Darts"? Sounds intriguing.. Been trying to talk the GF into making a ringsail for me but that's not looking very promising. If my lack of sewing skills/patience ever improves I might just attempt it myself.
Here's a few from 2000 and a close up of what is done. The darts make the chute a lot rounder both over the canopy and around the rim. You need to adjust the geometry to suit the shape desired.

#### Wallace

##### Well-Known Member
Here's a few from 2000 and a close up of what is done. The darts make the chute a lot rounder both over the canopy and around the rim. You need to adjust the geometry to suit the shape desired.
i like the shape of the open canopy. You are not adding any material, just sewing together these darts at the shroud attachment points?