Why Two Gs Estes???

On the "Full One-Year Warranty" Paper that comes with Estes Kits, why does it bother to list "Two Gs" in the "Launch Site Dimensions"????
Estes does'nt make a 2 G Motor Rocket, and a 2 G Motor Rocket would constitute a "High Power Rocket" anyhow, so why even make mention of what they believe would be a large enough Launch Site?:confused2:

Any thoughts???

By saying "H," They'd be admitting high-power exists? I don't know.


Later!

--Coop

A cluster of two G's is the largest thing you can fly before being considered high power.

or another thought....who cares?

Having 2 motors (2 G) make it a "complex" rocket

https://www.nar.org/NARmrsc.html

Bob

Yes so you can use 2 Gs as long as it is under 125 grams of propellant or under 320N of thrust and weighing less then 1500 grams.


Sent from my iPhone using Rocketry Forum

I see a Double 29mm Cluster Build in my Future. 2 G79 Single Use Motors only comes up to 120.2Grams of Propellant.

The Initial Mass of the G79-8 is 124 Grams., so times two is 248 Grams. That leaves 1252 Grams to make a Rocket.

Coop said:

By saying "H," They'd be admitting high-power exists? I don't know.


Later!

--Coop

Click to expand...

:rofl::rofl::rofl::rofl::rofl:

TopRamen said:

On the "Full One-Year Warranty" Paper that comes with Estes Kits, why does it bother to list "Two Gs" in the "Launch Site Dimensions"????
Estes does'nt make a 2 G Motor Rocket, and a 2 G Motor Rocket would constitute a "High Power Rocket" anyhow, so why even make mention of what they believe would be a large enough Launch Site?:confused2:

Any thoughts???

Click to expand...

The basic answer is that the Launch Site Dimensions table is part of the NAR Safety Code, which is printed on another page of that pamphlet. It is applicable to any legal model rocket, of which an Estes kit is one.

Estes included that pamphlet even when they did not sell either an F or a G motor.

A two-G rocket is indeed a legal model rocket, as long as the total propellant at liftoff is < 125 grams, which would allow up to 250NS of power with current propellants.

See this chart https://www.doug79.com/stuff/HPR_metric9c.pdf to see what is a model rocket and what is high power.

RoyAtl said:

The basic answer is that the Launch Site Dimensions table is part of the NAR Safety Code, which is printed on another page of that pamphlet. It is applicable to any legal model rocket, of which an Estes kit is one.

Estes included that pamphlet even when they did not sell either an F or a G motor.

Click to expand...

Yeah, that part is obvious. I was not disputing the Reason for the listing of the Dimensions.
Re-read my original Post. You obviously misinterpreted it.

TopRamen said:

Yeah, that part is obvious. I was not disputing the Reason for the listing of the Dimensions.
Re-read my original Post. You obviously misinterpreted it.

Click to expand...

No, I didn't misinterpret it at all. You asked why Estes included it even though they didn't have a rocket kit that big or that used two G motors. And I told you why.... because they printed the complete NAR Safety Code, not just the points of the safety code that covers the products Estes sells. I then pointed out your mis-assumption that a 2-G rocket is not a model rocket, and told you where you could find a nice visualization of what constituted a model rocket vs. a high power rocket.

G is the biggest motor they sell. They don't sell an H.

RoyAtl said:

No, I didn't misinterpret it at all. You asked why Estes included it even though they didn't have a rocket kit that big or that used two G motors. And I told you why.... because they printed the complete NAR Safety Code, not just the points of the safety code that covers the products Estes sells. I then pointed out your mis-assumption that a 2-G rocket is not a model rocket, and told you where you could find a nice visualization of what constituted a model rocket vs. a high power rocket.

Click to expand...

Ok, fair enough. My bad.

chadrog said:

A cluster of two G's is the largest thing you can fly before being considered high power.

Click to expand...

What about 3 "F" composites?? I was thinking of a 3" scratch using a 3 "F" cluster

AfterBurners said:

What about 3 "F" composites?? I was thinking of a 3" scratch using a 3 "F" cluster

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Sure, even 3 F50 Single Use comes up to 113.7 Grams of Propellant.
I'm trying to think of something to build now too....

I try not to think of costs when building, but in this case it's too glaring to ignore - a pair of G80T's runs 40-60. a pair of G76G's runs about $20. 29 40/120 cases pay for themselves VERY quickly in clusters.

AfterBurners said:

What about 3 "F" composites?? I was thinking of a 3" scratch using a 3 "F" cluster

Click to expand...

It's the most you can fly of the largest engines they sell at one time without certification - that better?

Golly Gosh!

chadrog said:

It's the most you can fly of the largest engines they sell at one time without certification - that better?

Click to expand...

Much better!

AfterBurners said:

Much better!

Click to expand...

We can easily add up all the other motors to find the limits too, which would result in some awe-inspiring clusters!