Intimidator 4 for MHM 2012

[AdrianParticipant]

Ooh, that’s a good name.

[edwardModerator]

Mike,

I have a 96″ toroidal chute that DaveH used on his L3. Less than 15fps if you want to use it.

Edward

[James Russell]

MikeS, the link to the pictures seems broken or changed?

[MikeSModerator]

Sorry. Only so much room. I replaced with MHM 2012 pictures.

[BEAR]

I am preparing to purchase a chute for my I-4. Weights appear to be about 16lbs empty. Any recommendations for a chute. I have been told Fruity chutes and Top Flite. It has also been suggested anywhere from 60″ to 84″ dia. Anybody have thoughts they want to share. I am looking for a descent rate of 20-25 fps.

[edwardModerator]

What descent rate do you want? I generally go for a 10-12 fps because I like landing soft, especially on our prairie. I make a torodial chute that does very well for the size. On my L3 I used a 60″ chute for a 15 pound rocket and got about 17 feet per second.

Edward

[BEAR]

That is very interesting. What are you asking for one of your chutes?

[James Russell]

Bear, Edward makes nice chute. Something I will point out though, Tripolicolorado.org has a list of vendors that support Colo Rocketry and there is a couple that are local. I am sure many are also on the NCR site. I shop these first and Alpha is on TC’s list.

[edwardModerator]

Sorry, I didn’t read the 20-25 fps. That’s screaming in! At 20 fps I get a 48″ parachute with a 17.5 pound recovery weight and recovering at the North Site – 5500′. A 60″ parachute gives you 16 fps and a 72″ parachute gives you 13 fps.

I’ve made two different varieties of the parachutes – high performance 1.1 oz ripstop and every day 1.7 oz ripstop. Both perform the same, but the 1.1 oz packs tighter and is lighter. If you don’t need to cram 10 pounds into a 5 pound sack, I use the 1.7 oz. I only have 2 1.1 oz chutes and both are for high performance minimum diameter rockets.

The 1.1oz chutes cost more than the 1.7oz because of materials cost and the labor involved in making them.

I don’t make anything smaller than 60″. 60″, 1.1 oz, $105, 1.7oz, $90. 72″ 1.1oz, $115, 1.7oz, $100.

My lead time is a bit – generally 3-4 weeks. I just sent back an order of fabric because they didn’t get my instructions clearly. I don’t sew hemispherical parachutes anymore – I figured if I’m sewing all those gores, I might as well make the most efficient shape that I can out of them. I will sew big flat circles if people want – those are easy to produce.

Also, on colors. I’ve done many colors of chutes. I’ve settled that I like pink/black the best. At this year’s MHM I didn’t know where my rocket had landed, just a general direction. From the 2nd windmill I spotted the pink parachute being backlit by the sun from 3 miles away. I don’t think I would have seen any other color. There was just this iridescent flare of pink that caught my eye and led me to the rocket.

Anyway, enough rambling,

Edward

[Steve JensenParticipant]

Edward, I had no idea you make chutes.

[Author]

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