REFLECTOR: Gliding Distance
Mark Magee
edjonesbrady at gmail.com
Wed Jun 20 05:44:51 CDT 2012
Hi Brooke,
I look forward to meeting you as well. Never met anyone from the AIR FORCE... :)
At least we speak the same language, sometimes.
Mark B. Magee
Sent from IPhone 4
On Jun 19, 2012, at 10:35 PM, Brooke Wolf <bwolf1 at tds.net> wrote:
> Mark
>
> I can't wait to meet you. We got some talkin to do!
>
> Brooke, USAF
>
>>
>> From: Mark Magee <edjonesbrady at gmail.com>
>> Subject: Re: REFLECTOR: Gliding Distance
>> Date: June 19, 2012 11:16:03 PM EDT
>> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>> Cc: "reflector at tvbf.org" <reflector at tvbf.org>
>> Reply-To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>>
>>
>> Hi Brooke,
>> Unfortunately or fortunately I learned some things The Navy way (there is: The Right Way, The Wrong Way And The NAVY WAY). I was trained glide ratio is first number is horizontal and second vertical and in the same units. 15 to 1: 15 ft or NM forward for each 1 ft or NM down.
>> Is that not the std used by all?
>>
>> Mark B. Magee
>> Sent from IPhone 4
>>
>> On Jun 19, 2012, at 9:50 PM, Brooke Wolf <bwolf1 at tds.net> wrote:
>>
>>> Mark
>>>
>>> I'm with you! All I want to know is…."When my engine quits at 5000 AGL, how many no wind miles can I glide?". I tend to think of altitude in feet and distance in miles. Different pilots have different ways of thinking about this. I prefer to think about it in terms of "How many miles can I go per thousand feet of altitude". Most every airplane I have flown has been "3 to 1". As you know that doesn't mean 3:1 glide ratio…it means I can go 3 miles for every 1000 ft altitude. Other pilots think in terms of actual glide ratio i.e. "18:1" which is exactly 3 to 1. Got you confused yet? It is all in semantics. It is important to get the semantics right so that we are all on the same page.
>>>
>>> Lets keep this discussion going. How far can YOU glide in your suddenly unpowered Velocity from 5000 feet (no wind of course!
>>>
>>> Your Phantom could only glide 5NM (30,000 ft) from 10000 feet? Man that thing was a brick!! The closest thing I can relate to is the T-38. All I remember about it was that L/Dmax was 240KIAS. Can't remember the glide ratio. Too many dead brain cells.
>>>
>>> Brooke
>>>
>>>
>>>
>>>
>>>>
>>>>
>>>> From: Mark Magee <edjonesbrady at gmail.com>
>>>> Subject: Re: REFLECTOR: Gliding Distance
>>>> Date: June 19, 2012 9:40:33 PM EDT
>>>> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>>>> Reply-To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>>>>
>>>>
>>>> You boys got me all confused here? Glide ratio: Three to One (F-4 Phantom II), at Best Glide speed airplane goes three feet forward and goes down 1 foot. Three to One Glide Ratio. You guys are throwing in some trigonometry that's confusing (possibly frightening) folks? At 10,000' AGL an F4 Phantom II in flameout at best glide has a 30,000 ft 'cone' below it at which touchdown (or ejection) will occur. Turns lessen the Three to One.
>>>> Fairly simple: if an XLFG clean and stopped prop does a 15 to 1 glide ratio, then at 10,000' AGL, I have a 150,000' 'cone' below me inside which my wheels will touch down, turns diminishing the cone. Airplane moves 15 feet forward, and falls 1 foot. 15 to 1 glide ratio.
>>>> Fairly simple.
>>>>
>>>> Mark B. Magee
>>>> PS (F-4 Phantom II was a template subject of my flight training: proof that with enough thrust a lead brick can fly!)
>>>>
>>>> On Tue, Jun 19, 2012 at 7:34 PM, Brooke Wolf <bwolf1 at tds.net> wrote:
>>>> Tom
>>>>
>>>> I was using the aviation standard of 6000ft/nautical mile. Admittedly, it is more like 6076 feet. Anyway, using 6000 ft., 1.41 nautical miles is 8460 ft. Hence, 8.4:1 glide ratio. Man…I like this stuff. Great discussion! Keep it up.
>>>>
>>>> Brooke
>>>>
>>>>
>>>>>
>
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