[roc-chat] Re: Pesky Pin Holes

I suggest www.thrustcurve.org

Sent from my iPhone

On Nov 30, 2011, at 6:11 PM, "David Erbas-White" <derbas@xxxxxxxxxxxxxxxx> 
wrote:

> On 11/30/2011 5:54 PM, STEVE BATTAGLIA wrote:
> 
> (well, it's only off-topic because you didn't start a new thread...)
> 
> You need to look at the thrust curves.  It's not a linear thrust, the total 
> Newtons is integrated over the total burn time,  If you look at the typical 
> thrust curve, there is an initial peak for     10-20% of the burn time, 
> followed by a lower-level sustaining thrust, with various degrees of 
> fall-off.  You really have to look at the thrust curves to understand it all 
> - look at the NAR website, or manufacturer's data, etc.
> 
> David Erbas-White
> 
> 
>> a bit off topic....but......
>> 
>> Can someone check my work here.... I pulled most of the conversions from the 
>> web..... might have been using some bum math.... 
>> 
>> 1st Stage = 5500 lbf  which = 24,475 N 7.48 sec burn
>>         which equals 183,073 Ns
>> 2nd Stage = 2100 lbf   which = 9,345 N 13.43 sec burn which equals 125,503 Ns
>>  total  308,576 Ns
>> 
>> Hmmmmmm.....
>> 
>> thanks...
>> 
>> 
>> steve
>> 
>> 
>> 
>> 
>> On Nov 30, 2011, at 12:49 PM, Wedge Oldham wrote:
>> 
>>> Yes, absolutely!
>>> Wedge
>>> 
>>> 
>>>  
>>> On Wed, Nov 30, 2011 at 8:15 AM,               Allen Coleman 
>>> <allencoleman46@xxxxxxxxx> wrote:
>>> Can Metal Glaze by Evercoat be used to fill spirals in blue tube and other 
>>> body tubes?
>>> 
>>> Allen Coleman
>>> 
>>> 
>>> 
>>> On Tue, Nov 29, 2011 at 6:28 PM, Wedge Oldham <wedgeoldham@xxxxxxxxx> wrote:
>>> Metal Glaze by Evercoat.  Spreads as easy as mayo;  sands as easy as chalk. 
>>>  Hardens in 20 minutes which is normally a good thing.  Sticks to 
>>> everything but the break of day.
>>> 
>>> On Nov 29, 2011 1:27 PM, "Troy Monroe Stacey" <tstacey001@xxxxxxxxxxxx> 
>>> wrote:
>>> Bondo. There's a finishing Bondo that we used on Itsy Bitsy and I don't 
>>> remember exactly what it was called, but it set up quick and sanded great 
>>> and was awesome. Anyone from Team Tarantula still around know what I'm 
>>> talking about? 
>>> 
>>> Sent from my iPhone
>>> 
>>> On Nov 29, 2011, at 1:18 PM, Gregory Lyzenga <lyzenga@xxxxxxxxx> wrote:
>>> 
>>>> 
>>>> On Nov 29, 2011, at 12:48 PM, Scott Christiansen wrote:
>>>> 
>>>>> Anyone have an easy way to fill pin holes in fiberglass? The              
>>>>>                                    less sanding the better.
>>>>>  
>>>>> Scott
>>>> 
>>>> If the holes aren't too big, I've found that wall spackle                  
>>>>                        from the home improvement store works well and 
>>>> sands with almost no effort.
>>>> 
>>>>         - Greg
>>> 
>>> 
>> 
>

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