Pinnacle 4" 5:1 ogive nose cone weight

[David_Stack]

Good Morning all;

'Noodling around' in Open Rocket with a new design, 4" diameter airframe. Does anyone happen to have a Pinnacle 4" 5:1 nose cone lying about that they can put on a scale? Neither Giant Leap nor Mac Performance has the weight detailed on their sites that I could see...

Thanks in advance,
Dave

 

[David_Stack]

Managed to 'catch my own fish'...

Didn't look closely enough at the Giant Leap web site. Under the Downloads header is a 'weights and measures' document, which provides the information I was looking for. D'oh!

 

[user 30299]

Managed to 'catch my own fish'...

Didn't look closely enough at the Giant Leap web site. Under the Downloads header is a 'weights and measures' document, which provides the information I was looking for. D'oh!

I can confirm the nose cone weight. The one I have on the bench is 312 grams.
The weight on the website is 319. Barely a hair difference.

 

[user 30299]

The cone's shoulder has a perfect fit in LOC body tube, but the cone's base diameter
is just a smidge bigger than the OD of the LOC tube.

The cone also fits into LOC's 98mm motor tube. But the cone's base diameter is just
a smidge smaller than the OD of the LOC motor tube.

 

[Rschub]

Has anyone used these [3.9 version] with LOC tube with a fiberglass sock? Would that take up the "smidge"?

 

[user 30299]

Has anyone used these [3.9 version] with LOC tube with a fiberglass sock? Would that take up the "smidge"?

I think the sock would make the tube a little larger than the nose cone.

You can see the smidge, you feel the smidge, but it's so small I don't think it's an issue.

Here are pictures of the cone on a new 3.9" tube from LOC.







Don't ask me to measure it. lol

You can do that after you buy the cone from Giant Leap. They make good stuff.

 

[Rschub]

Thats technically a smidgen.

 

[user 30299]

Thats technically a smidgen.

I work with a millwright out of Maine. He would call that a "skosh".

 

[Rschub]

Heh heh, our fitters work in various gauges of "hairs"

I think if I peel the glasine layer before using the sock, it will be close enough for me.