2,534 reputation
1125
bio website infosecfrog.blogspot.com
location Scotland, United Kingdom
age 43
visits member for 3 years, 7 months
seen 12 hours ago

Apr
27
comment Gravity on the International Space Station
You know @Keith's answer already states this, right?
Apr
19
comment Convert a 200mm linear stroke into 90 degrees motion
What do you mean by two sides?
Apr
15
comment Concerning the curvature of an airfoil (shape)
The force is because the blade is spinning. A wing is travelling in a straight line, but a rotating blade has all the mass of the blade trying to fly outwards!
Apr
6
comment Why does the sky look black in pictures taken from the summit of everest?
@user22834 - The explanation for these observations is that your second paragraph is incorrect.
Apr
6
comment Why does the sky look black in pictures taken from the summit of everest?
+1 ... it does this on every high flying aeroplane, and I have always enjoyed that deep blue above the curve of the horizon.
Apr
1
comment Is a purely vertical or almost vertical orbital launch possible?
Heh - but what do you use to keep a 100 mile cable up? A 100 mile orbit is going to be pretty fast - it certainly isn't geostationary :-)
Apr
1
comment Is a purely vertical or almost vertical orbital launch possible?
Have a look at physics.stackexchange.com/questions/26739/… for some useful information.
Apr
1
comment Is a purely vertical or almost vertical orbital launch possible?
See the space elevator if you want a possible (nearly) solution to get to geostationary orbit (or twice that far-using matching earth to hub and hub to outer orbit cables)
Mar
27
comment What would be the effects if Jupiter was to blown up?
This should be submitted directly to what-if.xkcd.com
Feb
26
comment Flushing water-Is it related to Coriolis force?
Probably worthwhile looking at this question on Skeptics: skeptics.stackexchange.com/q/450/619
Feb
25
comment X-ray diffraction (is it possible?)
Richard - how big is the crystal? Raindrop's answer covers small crystals, but the larger the crystal, the more difficult it is to analyse the data. Too big, and you just can't do it .
Feb
19
comment Are there still 'everyday' phenomena unexplained by Physics?
But the repeated predictions work for turbulent flow. We can calculate it. We know how to do it. That it is incredibly complex because there are so many interactions is self evident.
Feb
19
comment Are there still 'everyday' phenomena unexplained by Physics?
Surely many of these can be explained, but the challenge is simply that computation is complex.
Jan
14
comment What causes an aircraft to roll when rudder is applied
The primary cause of yaw induced roll is the differential in lift produced by the two wingtips travelling at different speeds. Certainly, you get a lot of other effects and secondary effects, but wing sweep is only a small factor.
Jan
8
comment Estimating drag due to wind - ribbon-shaped sail
Remember jet stream winds can be over 50m/s, and they are unpredictable in their route. Admittedly the strongest ones are closer to the pole, but be aware of loops of high altitude (>30000m), high speed winds in any calculation.
Jan
7
comment Ideal distance of eye from a lens
This will depend entirely on combination of the lenses used and their focal length, and quite possibly on whether you care about the image being upright or inverted
Jan
3
comment Is it possible that there is a color our human eye can't see?
Ah - yes, Sorry @Bernhard - in re-reading, I agree with you.
Jan
3
comment Is it possible that there is a color our human eye can't see?
The simple proof is that some animals can see in infra-red, and some can see in ultra-violet. This is well understood.
Dec
27
comment The Double Slit Experiment - delayed measurement
One question- they didn't record the Data so how do they know what they got?
Dec
20
comment Why are there more vertical takeoff than horizontal for spacecrafts?
True - it's all about progress, and this is a step.