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Search: Posts Made By: doppleganger
Showing results 1 to 19 of 19
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Forum: Engineers & Technicians
4th Jan 2011, 19:15
Replies: 17
Views: 5,389
Posted By doppleganger

I haven't heard of that as being another reason...

I haven't heard of that as being another reason for dimples on a golf ball but the theory is good, so it is a reasonable idea.

Any object which is spinning as it sails through the air will...
Forum: Engineers & Technicians
9th Apr 2010, 21:21
Replies: 12
Views: 2,456
Posted By doppleganger

Er... no! You are all confusing static...

Er... no!

You are all confusing static stability with dynamic stability.

What flame_bringer described in his first post was a perfect description of Dynamic Stability (lateral). Everyone then...
Forum: Engineers & Technicians
22nd Feb 2010, 13:03
Replies: 17
Views: 5,389
Posted By doppleganger

Not dissimilar from a golf ball is Amy Williams'...

Not dissimilar from a golf ball is Amy Williams' skeleton bobsleigh helmet.

However, since the helmet enters the air the same orientation all the time, and does not have to withstand repeated...
Forum: Engineers & Technicians
16th Feb 2010, 12:54
Replies: 2
Views: 828
Posted By doppleganger

I am told that airtechbooks.com will have Module...

I am told that airtechbooks.com will have Module 16 available in first week of March.
Forum: Engineers & Technicians
12th Feb 2010, 19:04
Replies: 17
Views: 5,389
Posted By doppleganger

Airflow over/around a car is even more...

Airflow over/around a car is even more predictable than an aeroplane. There is a much smaller speed range, and no change in angle of attack to worry about.

However the back end of a car is so...
Forum: Engineers & Technicians
10th Feb 2010, 15:38
Replies: 17
Views: 5,389
Posted By doppleganger

It is all to do with tripping the boundary layer...

It is all to do with tripping the boundary layer to make it turbulent sooner (i.e. moving the transition point forward). Turbulent air has more energy, so will stick to the surface further around...
Forum: Aviation History and Nostalgia
28th Dec 2009, 13:43
Replies: 35
Views: 17,172
Posted By doppleganger

It appears that I have stumbled into a political...

It appears that I have stumbled into a political arena that I have not experienced before, nor had anticipated - that is for some model flyers, the assumption that power flying/RC is the only real...
Forum: Aviation History and Nostalgia
27th Dec 2009, 20:58
Replies: 35
Views: 17,172
Posted By doppleganger

To oxenos, Very sorry to have upset you, but I...

To oxenos,
Very sorry to have upset you, but I think you misunderstand. I have no objection to having insurance, or being asked to prove it. I would be more than happy to get it if that is the...
Forum: Engineers & Technicians
1st Nov 2009, 22:55
Replies: 6
Views: 2,740
Posted By doppleganger

In very basic terms, the coarse synchro is for...

In very basic terms, the coarse synchro is for high rates of climb, the fine synchro is for fine tuning when the aircraft levels off. Really more applicable to fighters which are likely to climb at...
Forum: Aviation History and Nostalgia
12th Sep 2009, 20:16
Replies: 35
Views: 17,172
Posted By doppleganger

This story has troubled me ever since I read it...

This story has troubled me ever since I read it in the Bedford newspaper a couple of weeks ago.

I have been a regular visitor to the Shuttleworth Collection, on non-flying days, flying proms,...
Forum: Engineers & Technicians
23rd Feb 2009, 11:42
Replies: 3
Views: 943
Posted By doppleganger

The CAA like to have a full working week prior to...

The CAA like to have a full working week prior to the exam, in order to prepare the papers. If there is a public holiday (such as May Day) on the Monday of the normal exam week, the exam is moved to...
Forum: Engineers & Technicians
17th Nov 2008, 18:14
Replies: 3
Views: 831
Posted By doppleganger

If you are UK based, then try Avionics -...

If you are UK based, then try Avionics - airtechbooks.com (http://airtechbooks.com/index.php?categoryID=107) for any of the above mentioned titles.
Forum: Engineers & Technicians
4th Nov 2008, 18:48
Replies: 6
Views: 2,365
Posted By doppleganger

Mmmm... sounds like someone plugging their own...

Mmmm... sounds like someone plugging their own site there...

The problem with the stuff from that site, is it is old stuff ripped from the club66 site anyway, and a tad out of date. A bit...
Forum: Engineers & Technicians
28th Feb 2008, 21:39
Replies: 7
Views: 4,183
Posted By doppleganger

CAAIP Leaflet 1-12 - The Acceptance of New...

CAAIP Leaflet 1-12 - The Acceptance of New Aircraft Components - may also answer your question
Forum: Engineers & Technicians
5th Feb 2008, 11:52
Replies: 61
Views: 13,440
Posted By doppleganger

Do you do the exams in English?

Do you do the exams in English?
Forum: Engineers & Technicians
30th Jan 2008, 18:29
Replies: 7
Views: 1,409
Posted By doppleganger

Yes, you can self study just from textbooks, and...

Yes, you can self study just from textbooks, and do the exams, one-by-one at any of the CAA exam venues. You must pass all the required exams within a 5-year period (but I've known some people do it...
Forum: Engineers & Technicians
10th Jan 2008, 18:44
Replies: 7
Views: 3,092
Posted By doppleganger

jar66 club is now club66pro .co.uk Much...

jar66 club is now club66pro .co.uk

Much recommended
Forum: Engineers & Technicians
10th Jan 2008, 18:41
Replies: 3
Views: 1,000
Posted By doppleganger

Have a look at Airworthiness Notice No.7 Appendix...

Have a look at Airworthiness Notice No.7 Appendix 2.

It may be something to do with your CofA being issued before 28 September 2007, and hence was still an "expiring" CofA.
Forum: Engineers & Technicians
4th Jan 2008, 07:41
Replies: 2
Views: 1,065
Posted By doppleganger

Hi wiveny As an ex RAF guy, there is no...

Hi wiveny

As an ex RAF guy, there is no reason why you cannot self study the modules. Many of your old colleagues have done so before you. You will need to make some time in your busy home life...
Showing results 1 to 19 of 19


 
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