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Search: Posts Made By: rmh
Showing results 1 to 25 of 26
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Forum: Aerodynamics
02-05-2010, 09:20 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Me thinks you changed golf balls in mid stream -so to speak
Forum: Aerodynamics
02-02-2010, 05:36 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

actually- an electric motor -which has max torque at ZERO rpm -is a very desireable setup for driving a propeller -
far better than an IC engine when instant performance is req'd
I have ...
Forum: Aerodynamics
02-02-2010, 11:57 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Watts came up with horsepower - unfortunately, people have misunderstood it since it's inception
Why couldn't he have come up with a more simple direct equasion?
I guess at the time...
Forum: Aerodynamics
02-01-2010, 08:08 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Here is a another bit of info-
as aircraft get smaller, the wing loading becomes more critical drag- not worth consideration
As a plane gets larger, the powerloading becomes more...
Forum: Aerodynamics
01-11-2010, 09:22 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

dimples on balls -
pretty iffy stuff
Now goosebumps on chicks - another matter .
Forum: Aerodynamics
12-09-2009, 01:52 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Geez be careful -you could upset some faktz, stated by some of me most larnerd masters of advanced aerodynamics
Forum: Aerodynamics
11-09-2009, 10:07 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

On JEOPARDY tonight , the following question was asked
Question-When a batter hits the ball - he hopefully produces backspin on the ball.
>The backspin cause the air over the top of the ball to...
Forum: Aerodynamics
11-09-2009, 09:36 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

well sorta -but I also get a chance to look for the real problems -which never seem to be related to the airfoil selected.
weight , balance, bending under load etc., are the usual suspects.
Forum: Aerodynamics
11-09-2009, 07:22 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

If I feel an airfoil is not correct - I just take a time out and have a drink-
Usually the airfoil has now improved
If not - I lighten the plane -smaller batteries etc-
that usually...
Forum: Aerodynamics
11-09-2009, 02:36 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

A properly designed airfoil"
According to what criteria?
All of the shapes are compromises
every last one of em
As weight us reduced or the power is increased ,the criteria for the
...
Forum: Aerodynamics
11-08-2009, 12:46 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

You mean those " approved for medicinal use " devices?
No
But I have a nice bottle of J D Single Barrel in the cupboard-
Keeps the mind relaxed.
Forum: Aerodynamics
11-08-2009, 10:51 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

tsk tsk
with no gravity -why needs to fly?
plus
everything weighs the same
Did they not cover this at the university? (Now you know why I ran screaming from the "repository of ...
Forum: Aerodynamics
11-08-2009, 08:04 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Surprised that point was missed also- no gravity= no atmosphere.
I wonder which airfoil works best wif no gravity?
Forum: Aerodynamics
11-07-2009, 11:28 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

No - But my small block Chev powered A100 Healey only weighed 2100 lbs .
(da Rock- the attached pic is an A100 -a lot nicer than mine -)
Forum: Aerodynamics
11-07-2009, 09:44 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

We used to leave our race cars out in the weather so that the rusting would lighten them.
The performance improve 3.7 %
Forum: Aerodynamics
11-06-2009, 11:15 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Include the engines from the F14 -yup it works!
Aero rule 1- enough power fixes all other deficiencies-
Forum: Aerodynamics
11-06-2009, 08:38 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Yup - all kinds of drag- depending on what the source or what the result etc., we give it a "speshial" name -but still - we are simply working with low pressure.
good low pressure n bad...
Forum: Aerodynamics
11-06-2009, 06:02 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

So the lifting surface becomes a drag surface -
OK
Ot lets say the low pressure which was on th top surface simlply becomes VERY low pressure as the wing rotates.
T/F?
The lift is then...
Forum: Aerodynamics
11-06-2009, 03:17 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Well- consider the "WALL" We fly along at a good clip then -chopping power and at the same time -we pitch the model and return power as needed to make a transition from say 40mph to a 25 mph...
Forum: Aerodynamics
11-06-2009, 01:58 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

A drag race does not necessarily have a drag queen at the event. Also the sticklers for "kerect" aerodynamic terninology don't all agree on what is parasitic or induced or transitory.
I...
Forum: Aerodynamics
10-30-2009, 08:15 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

WoW
I simply noted that lift and drag are really in the eye of the beholder
You say banana
I say bahnahna
Lift and drag are like Yin and Yang
But The proper use of aerodynamic...
Forum: Aerodynamics
10-29-2009, 07:47 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

Goodness -you are going to upset the aeronautical terminology correctness control gruppe.
Lift is drag and drag is lift- is my take on it
But you must use the proper words .
These guys...
Forum: Aerodynamics
10-27-2009, 01:29 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

[quote]ORIGINAL: banktoturn



Not being a golpher (?) I am surprised that velocity is restricted.
I suspeck that limit exceeds the practical ability of human golfers .
The wind...
Forum: Aerodynamics
10-27-2009, 01:01 PM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

[quote]ORIGINAL: banktoturn
Your guess as to the mechanism by which distance balls acquire lower spin rates doesn't happen to be the one that the ball manufacturers give, but it doesn't really...
Forum: Aerodynamics
10-27-2009, 11:45 AM
Replies: 229
Views: 28,126
Posted By rmh

RE: Golf ball dimples

As long as we are all guessing
-try this guess
A worn golf ball may not store as much energy (from the club) .
old balls may lose some of their "bounce"
(Don't we know it)
Distance...
Showing results 1 to 25 of 26
 
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