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Search: Posts Made By: ClippedCub
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19th Jun 2016, 12:21
Replies: 1
Views: 2,617
Posted By ClippedCub

Nice! I've got a project for sale in the states.

Nice! I've got a project for sale in the states.
20th Oct 2011, 00:41
Replies: 462
Views: 130,488
Posted By ClippedCub

Excuse the absence. It's fall around here and...

Excuse the absence. It's fall around here and the GF scheduled a cabin vacation. Surprise.

Have found some change orders from back in the day, and the bob weight is included;

Tech INFO -...
13th Oct 2011, 14:07
Replies: 462
Views: 130,488
Posted By ClippedCub

Has a carb with a float. Float could have been...

Has a carb with a float. Float could have been forced down under excessive g creating flooding?



Pushrod actuated. Also, elevators are interchangeable left and right, so the actuactor rod...
13th Oct 2011, 01:18
Replies: 462
Views: 130,488
Posted By ClippedCub

At first glance, the oil canning would be...

At first glance, the oil canning would be attributed to the high download on the tail. In this case with the one tab and the structural flexing across the elevator, the left elevator is making less...
12th Oct 2011, 23:14
Replies: 462
Views: 130,488
Posted By ClippedCub

Might check; NASA Technical Reports Server...

Might check;

NASA Technical Reports Server (http://ntrs.nasa.gov/search.jsp)

The sampling rate of the video is 30 frames per second. Thinking the HS isn't showing flutter, but the left HS...
12th Oct 2011, 01:33
Replies: 462
Views: 130,488
Posted By ClippedCub

It'd be good to meet the people here. Airplane...

It'd be good to meet the people here. Airplane people are a special breed..
12th Oct 2011, 01:31
Replies: 462
Views: 130,488
Posted By ClippedCub

Think the chance is greater for the torque tube...

Think the chance is greater for the torque tube straining the attachments internal to the elevator. For Voodoo, the cables didn't jam, but everything getting beaten up if the 1st flutter mode is...
11th Oct 2011, 03:06
Replies: 462
Views: 130,488
Posted By ClippedCub

Another frame showing bent port HS due to...

Another frame showing bent port HS due to plunging flutter if the frame isn't an optical illusion. The counterweights out at the tips would exacerbate this mode from the elevator pitch flutter,...
11th Oct 2011, 02:37
Replies: 462
Views: 130,488
Posted By ClippedCub

Internet article of Matt Jackson denying previous...

Internet article of Matt Jackson denying previous internet article.

What Didn’t Cause the Reno Air Race Crash | Jeff Wise (http://jeffwise.net/2011/10/10/what-didnt-cause-the-reno-air-race-crash/)
11th Oct 2011, 02:11
Replies: 462
Views: 130,488
Posted By ClippedCub

From this video; Reno Crash Live 2011-09-16...

From this video;

Reno Crash Live 2011-09-16 - YouTube (http://www.youtube.com/watch?feature=player_embedded&v=Ha95cl2gvPI)

If anybody can work out pitch rate for the first 45 degrees and the...
10th Oct 2011, 01:31
Replies: 462
Views: 130,488
Posted By ClippedCub

A little slow for a strong shock wave to form...

A little slow for a strong shock wave to form unless he was pulling significantly more than normal turn g. But again, add in the Mach buffet during testing, and the tab rod or attachments could have...
10th Oct 2011, 01:07
Replies: 462
Views: 130,488
Posted By ClippedCub

Other P-51 racers are saying the oil canning is...

Other P-51 racers are saying the oil canning is normal, and transitory, though I'd think they'd eliminate that from a drag standpoint since they're meticulous on maintaining smoothness. The...
8th Oct 2011, 23:27
Replies: 462
Views: 130,488
Posted By ClippedCub

There was a lot dive testing going on around the...

There was a lot dive testing going on around the war and they played with shapes to affect the hinge moments and effectiveness. The technology development ended when the Brits figured out the flying...
8th Oct 2011, 04:12
Replies: 462
Views: 130,488
Posted By ClippedCub

Was going to keep this to myself so as not to...

Was going to keep this to myself so as not to clutter up the discussion, but the elevator has been reshaped for high speed effectiveness. It's more bulbous. This is to get it out of the boundary...
8th Oct 2011, 03:43
Replies: 462
Views: 130,488
Posted By ClippedCub

Corrected link from before on stability. ...

Corrected link from before on stability.

http://flightlab.net/Flightlab.net/Download_Course_Notes_files/5_LongitudinalStatic%232BA158.pdf
8th Oct 2011, 03:25
Replies: 462
Views: 130,488
Posted By ClippedCub

There's always room for error, but if Leeward...

There's always room for error, but if Leeward felt uncomfortable, he would have aborted. His stability would have increased in the turn after he poured on the coals to make the pass. It would have...
8th Oct 2011, 03:21
Replies: 462
Views: 130,488
Posted By ClippedCub

Doubt it. Never looked at the rules. What I was...

Doubt it. Never looked at the rules. What I was trying to do was increase drag divergence Mach number, specify the flight testing required to make me feel comfortable, which would have included VD,...
8th Oct 2011, 01:45
Replies: 462
Views: 130,488
Posted By ClippedCub

Trying to keep it simple. MD is 0.80. VD is 505...

Trying to keep it simple. MD is 0.80. VD is 505 IAS at race altitude and up to a certain altitude that I forget.



The teams have competent structural engineers from industry and the owners...
7th Oct 2011, 23:19
Replies: 462
Views: 130,488
Posted By ClippedCub

The racers have played around with ballast, they...

The racers have played around with ballast, they know their cg vs consumables loading chart, and they set the cg to what they can handle throughout the race. Leeward had GG flying for a few years so...
7th Oct 2011, 14:09
Replies: 462
Views: 130,488
Posted By ClippedCub

From what I understand, the torque tube sheared...

From what I understand, the torque tube sheared the retaining fasteners, whether at the pictured housing or internal to the elevator. They assumed the tab actuator rod failed from fatigue.


...
6th Oct 2011, 19:36
Replies: 462
Views: 130,488
Posted By ClippedCub

There's another reason not to touch the trim. ...

There's another reason not to touch the trim. The pilot can monitor aircraft status during the race. If the airplane exhibits any pitch changes, or stick force changes, that would be an indication...
6th Oct 2011, 13:57
Replies: 462
Views: 130,488
Posted By ClippedCub

If you look closely, you can see a sudden nose-up...

If you look closely, you can see a sudden nose-up pitch while in the turn. But I've still not sure about the trim tab failure sequence causing the the rolling moment either, just leaning. The...
6th Oct 2011, 02:06
Replies: 462
Views: 130,488
Posted By ClippedCub

Lyman, you're not a pilot, are you. No offense,...

Lyman, you're not a pilot, are you. No offense, but what's your background? You seem to have a Wiki knowledge of aircraft, their workings, and their operation.
5th Oct 2011, 23:17
Replies: 462
Views: 130,488
Posted By ClippedCub

In response to the just prior post, that's...

In response to the just prior post, that's missing now, on discrete roll rates in the turn;

There's a small right roll rate well before the left wing drop with a slight left roll rate immediately...
5th Oct 2011, 22:16
Replies: 462
Views: 130,488
Posted By ClippedCub

Google for the basic aerodynamic and control...

Google for the basic aerodynamic and control theory answers of wings.

Could have been turbulence from ground based items/structures, but to conclude the initial dip was from wake turbulence of...
Showing results 1 to 25 of 163
 


 
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