![]() |
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
|
#1
|
|||
|
|||
![]()
In article . com,
"Dancing Fingers" wrote: Hi all, I always wanted to build my own airplane but the time and money has eluded me. So I've decided to design and build my own recumbent trike, with farings. This brings me to my question, if golf balls have dimples, to help them sail further, why don't wings -- especially for STOL aircraft? Would putting dimples in my faring reduce my wind resistance? Just curious. Chris First of all, golf balls have dimples because in order to create lift they need to influence the air passing by them with the golf ball's spin. The dimples help to make the air slow down beneath the ball and speed up above it; creating downward flow. Wings produce that downward flow with their shape. |
#2
|
|||
|
|||
![]()
("Alan Baker" wrote)
First of all, golf balls have dimples because in order to create lift they need to influence the air passing by them with the golf ball's spin. The dimples help to make the air slow down beneath the ball and speed up above it; creating downward flow. Wings produce that downward flow with their shape. How about a dimpled spinner? Your choice - slice or draw. Montblack |
#3
|
|||
|
|||
![]() "Alan Baker" wrote in message ... In article . com, "Dancing Fingers" wrote: Hi all, I always wanted to build my own airplane but the time and money has eluded me. So I've decided to design and build my own recumbent trike, with farings. This brings me to my question, if golf balls have dimples, to help them sail further, why don't wings -- especially for STOL aircraft? Would putting dimples in my faring reduce my wind resistance? Just curious. Chris First of all, golf balls have dimples because in order to create lift they need to influence the air passing by them with the golf ball's spin. The dimples help to make the air slow down beneath the ball and speed up above it; creating downward flow. I believe that you have the effect exactly backward. The spin, which should only be significant using the more steeply pitched irons; slows the relative speed over the "top" of the ball and causes it to remain attached longer, while the air flowing under the bottom breaks away more quickly, which would result in a slight net lift. It also explains why a "slice" curves as it does--which is why a smooth ball would have improved my game. :-( Wings produce that downward flow with their shape. Exactly. Peter |
#4
|
|||
|
|||
![]()
In article ,
"Peter Dohm" wrote: "Alan Baker" wrote in message ... In article . com, "Dancing Fingers" wrote: Hi all, I always wanted to build my own airplane but the time and money has eluded me. So I've decided to design and build my own recumbent trike, with farings. This brings me to my question, if golf balls have dimples, to help them sail further, why don't wings -- especially for STOL aircraft? Would putting dimples in my faring reduce my wind resistance? Just curious. Chris First of all, golf balls have dimples because in order to create lift they need to influence the air passing by them with the golf ball's spin. The dimples help to make the air slow down beneath the ball and speed up above it; creating downward flow. I believe that you have the effect exactly backward. The spin, which should only be significant using the more steeply pitched irons; slows the relative speed over the "top" of the ball and causes it to remain attached longer, No. It doesn't. Golf balls spin with a rotation such that the bottom is moving forward and the top is moving rearward. while the air flowing under the bottom breaks away more quickly, which would result in a slight net lift. It also explains why a "slice" curves as it does--which is why a smooth ball would have improved my game. :-( Wings produce that downward flow with their shape. Exactly. Peter |
#5
|
|||
|
|||
![]()
On Wed, 14 Jun 2006 05:20:31 GMT, Alan Baker wrote:
I believe that you have the effect exactly backward. The spin, which should only be significant using the more steeply pitched irons; slows the relative speed over the "top" of the ball and causes it to remain attached longer, No. It doesn't. Golf balls spin with a rotation such that the bottom is moving forward and the top is moving rearward. Not the way I play... :-) Ron Wanttaja |
#6
|
|||
|
|||
![]()
"Ron Wanttaja" wrote in message
... On Wed, 14 Jun 2006 05:20:31 GMT, Alan Baker wrote: I believe that you have the effect exactly backward. The spin, which should only be significant using the more steeply pitched irons; slows the relative speed over the "top" of the ball and causes it to remain attached longer, No. It doesn't. Golf balls spin with a rotation such that the bottom is moving forward and the top is moving rearward. Not the way I play... :-) Ron Wanttaja Wait. That was my line! Peter |
#7
|
|||
|
|||
![]()
Peter Dohm wrote:
"Ron Wanttaja" wrote in message ... On Wed, 14 Jun 2006 05:20:31 GMT, Alan Baker wrote: I believe that you have the effect exactly backward. The spin, which should only be significant using the more steeply pitched irons; slows the relative speed over the "top" of the ball and causes it to remain attached longer, No. It doesn't. Golf balls spin with a rotation such that the bottom is moving forward and the top is moving rearward. Not the way I play... :-) Ron Wanttaja Wait. That was my line! Peter Oh well. The net effect is the same... |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
VP-II wings available in Oregon, USA (Or, "How I was coconuted...") | Roberto Waltman | Home Built | 2 | October 29th 04 04:21 PM |
Charging for Wings safety seminar? | Marty Shapiro | Piloting | 19 | June 23rd 04 05:28 PM |
Double covering fabric covered wings | [email protected] | Home Built | 9 | May 9th 04 08:39 PM |
Stolen "Champ" wings located...from 23,000 feet!! | Tom Pappano | Piloting | 17 | December 15th 03 01:24 PM |
Wings from "Champ" stolen in Oklahoma after emergency landing | Tom Pappano | Piloting | 1 | December 7th 03 05:02 AM |