Has anyone built the new 11.5" Cowabunga Mammoth yet?

Nathan · Dec 20, 2017

It's been on the Madcow website for almost a year but I haven't seen any discussion about it. Has anyone built one yet? I'm thinking about it . . .

djkingsley · Dec 20, 2017

Go for it Nathan, it would be awesome. I looked at the kit on display during LDRS last April.

Swissyhawk · Dec 20, 2017

Would you go with the standard "cow" paint job or do your own thing?

Bat-mite · Dec 20, 2017

I want one. Hard to justify to the wife since I had to spend a lot to rebuild the F200. Might hang in there till next Black Friday and see if there is another 25% off sale.

markkoelsch · Dec 20, 2017

Nathan said:
It's been on the Madcow website for almost a year but I haven't seen any discussion about it. Has anyone built one yet? I'm thinking about it . . .

Nathan, how many months of wet sanding would a rocket of that size require to get one of your famous finishes?

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Nathan · Dec 20, 2017

djkingsley said:
Go for it Nathan, it would be awesome. I looked at the kit on display during LDRS last April.

I think I will. But I'm already just now starting on a 6 foot tall replica of Tom Cohen's big square rocket. So it might have to wait on the build pile for a while. Since apparently nobody here has built a Cowabunga Mammoth yet I guess I should do another build thread.

Bat-mite said:
I want one. Hard to justify to the wife since I had to spend a lot to rebuild the F200. Might hang in there till next Black Friday and see if there is another 25% off sale.

The stock market has been very good to me this year.

Swissyhawk said:
Would you go with the standard "cow" paint job or do your own thing?

Definitely it would need a custom paint job.

markkoelsch said:
Nathan, how many months of wet sanding would a rocket of that size require to get one of your famous finishes?

It's only about 8 feet tall so without doing the math I'm guessing that it has about the same surface area as my upscale Frenzy which is 13'6". That took several weeks of wet sanding. But polishing a big rocket is actually pretty quick and easy because I use a power polisher.

djkingsley · Dec 20, 2017

What are you using for the square tubes?

markkoelsch · Dec 20, 2017

Nathan said:
I think I will. But I'm already just now starting on a 6 foot tall replica of Tom Cohen's big square rocket. So it might have to wait on the build pile for a while. Since apparently nobody here has built a Cowabunga Mammoth yet I guess I should do another build thread.

The stock market has been very good to me this year.

Definitely it would need a custom paint job.

It's only about 8 feet tall so without doing the math I'm guessing that it has about the same surface area as my upscale Frenzy which is 13'6". That took several weeks of wet sanding. But polishing a big rocket is actually pretty quick and easy because I use a power polisher.

Nathan, I give you credit- I would never have the patience nor technique to do that. I am sure it will be gorgeous when done though.

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Nathan · Dec 20, 2017

djkingsley said:
What are you using for the square tubes?

I'm designing it as a 4x upscale of the mini Higgs Farm rocket. It will be a 4" fiberglass rocket with plywood on the outside. I'm still trying to figure out how to build the nose cone.

Andrew_ASC · Dec 20, 2017

Copper plate barn silo look? I have no idea what you mean by farm rocket.

mpitfield · Dec 20, 2017

Nathan said:
I'm designing it as a 4x upscale of the mini Higgs Farm rocket. It will be a 4" fiberglass rocket with plywood on the outside. I'm still trying to figure out how to build the nose cone.

Does that mean it will have a 98mm MMT

Nathan · Dec 20, 2017

Andrew_ASC said:
Copper plate barn silo look? I have no idea what you mean by farm rocket.

This is Tom Cohen's square rocket. Later he added "Higgs Farm" decals and the name changed to Higgs Farm rocket.
[video=youtube;gZwkg0ho6tQ]https://www.youtube.com/watch?v=gZwkg0ho6tQ[/video]

mpitfield said:
Does that mean it will have a 98mm MMT

It will have a 75mm MMT

Andrew_ASC · Dec 20, 2017

Ahh okay. Thanks I had trouble visualizing it.

Steve Shannon · Dec 20, 2017

Andrew_ASC said:
Ahh okay. Thanks I had trouble visualizing it.

Its called that in honor of the working farm that welcomes the Maryland Delaware Rocketry Association and allows them to launch part of the year.

djkingsley · Dec 20, 2017

Nathan said:
I'm designing it as a 4x upscale of the mini Higgs Farm rocket. It will be a 4" fiberglass rocket with plywood on the outside. I'm still trying to figure out how to build the nose cone.

I would think that foam board covered in fiberglass similar to the way the mini is built would work well.

boatgeek · Dec 21, 2017

Nathan said:
I'm designing it as a 4x upscale of the mini Higgs Farm rocket. It will be a 4" fiberglass rocket with plywood on the outside. I'm still trying to figure out how to build the nose cone.

I did a pyramid nose "cone" for my square rocket, also a 4". It only has a 54mm motor mount because I'm a wimp like that.

Build thread here, with some pictures of the nose cone assembly at post #38. https://www.rocketryforum.com/showt...esn-t-quite-fit-in/page2&highlight=dimetrodon The Higgs Farm shape is a little harder, but could be done with similar techniques.

Bat-mite · Dec 21, 2017

Nathan, you might want to talk to Tom about what he learned regarding altimeter port holes in square rockets. When the Higgs rocket was new, we had the NC blow off on the pad when Tom opened his bay door. He asked around and ended up making some changes to his port size and location, and it hasn't happened since.

Nathan · Jan 4, 2018

Just ordered the kit!

Madcow only charged me $5.99 shipping. I think that might be a mistake since this is a 40 lb, 8 foot rocket which I'm sure is going to ship in a big box.

DavidMcCann · Jan 4, 2018

Nathan said:
Just ordered the kit!

Madcow only charged me $5.99 shipping. I think that might be a mistake since this is a 40 lb, 8 foot rocket which I'm sure is going to ship in a big box.

Last I knew Madcow was doing flat rate shipping... at least they used to.

Bat-mite · Jan 5, 2018

DavidMcCann said:
Last I knew Madcow was doing flat rate shipping... at least they used to.

Yep, they inherited that from Rocketry Warehouse.

Nathan · Jan 5, 2018

Cool. I've paid a higher shipping charge that that just to buy a handful of bolts.

recon60 · Jan 5, 2018

That is steal if they ship the mega cow for flat fee. Thanks much Mad Cow.

Bat-mite · Jan 6, 2018

Flat fee on anything in stock. Not for special orders.

Swissyhawk · Jan 6, 2018

I wonder how many 11.5" Cowabungas they keep in stock?

Nathan · Jan 6, 2018

Swissyhawk said:
I wonder how many 11.5" Cowabungas they keep in stock?

Apparently only one. After I ordered mine it changed to "Out of stock".

The_Lone_Beagle · Feb 5, 2018

Nathan said:
The stock market has been very good to me this year.

Oh no! I hope you don't have to send it back!

How's the build going?

Nathan · Feb 5, 2018

Ha, easy come, easy go. The Cowabunga build hasn't started yet, don't have all the parts yet. Plus I'm working on another HPR build now already. I'll do a build thread when I start working on it.

Has anyone built the new 11.5" Cowabunga Mammoth yet?

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