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Offline bert-nc

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angle of mortar
« on: September 25, 2009, 11:22:38 AM »
I was thinking of starting on the mortar bed for my golf ball mortar this week-end. Calling for rain saturday and saturday night, perfect time to get started. Notice that a lot of mortars I have seen pics of  have no adjustment for changing the angle of the mortar. Want angle do most of you use? I am guessing 45-70 degrees.

thanks in advance

bert-nc
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Offline Artilleryman

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Re: angle of mortar
« Reply #1 on: September 25, 2009, 12:17:35 PM »
Civil War period Coehorns were typically set at 45 degrees.  Siege mortars could be adjusted.  All of the range tables give ranges for various powder charges for 45 degrees.
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Offline Rickk

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Re: angle of mortar
« Reply #2 on: September 25, 2009, 01:54:32 PM »
If you try for 45 degrees, any error caused by getting the angle incorrect is minimized.

The same angular error at more than, or less than 45 degrees will cause a more significant error in the point of impact.

It has to do with the Sine and Cosine functions and how the rate of change of the two of them intersect at 45 degrees, but since I am on vacation as of a few hours ago and on my 4th or 5th beer, any more in-depth explanation I could attempt to offer right now might give you a headache, and most certainly would give me one.  ;)

Rick
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Offline RocklockI

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Re: angle of mortar
« Reply #3 on: September 25, 2009, 02:36:34 PM »
rest your mind rickk ,you deserve it ....... ;D , any more in-depth explanation is not needed now .

sit down man ,take a load off ..... :o.....play some battleship ,or parchezzi ....or ...whatever ...

at beer seven or eight ,,,report back  :D .

the degrees of diffarance , in or on nearly any issue will not be as pressing .......sine AND cosign ....

pick one and stick with it ....it's for the best ! when you wake up ....you'll feel better ......

sorry rickk .

bert-nc , i think he is right though 45 degrees is what i've always heard was standard .

gary

eta dont load your cannon with beer .....




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Offline bert-nc

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Re: angle of mortar
« Reply #4 on: September 25, 2009, 02:38:21 PM »
Quote from: Rickk on September 25, 2009, 01:54:32 PM
If you try for 45 degrees, any error caused by getting the angle incorrect is minimized.

The same angular error at more than, or less than 45 degrees will cause a more significant error in the point of impact.

It has to do with the Sine and Cosine functions and how the rate of change of the two of them intersect at 45 degrees, but since I am on vacation as of a few hours ago and on my 4th or 5th beer, any more in-depth explanation I could attempt to offer right now might give you a headache, and most certainly would give me one.  ;)

Rick

everything you said after the first sentence pretty much went right over my head :D

enjoy your vacation

bert-nc
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Offline bert-nc

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Re: angle of mortar
« Reply #5 on: September 25, 2009, 02:41:25 PM »
bert-nc , i think he is right though 45 degrees is what i've always heard was standard .

gary


I think 45 degrees is what I will go with

thanks

bert-nc
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