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Search: Posts Made By: IFMU
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Forum: Rotorheads
8th Jul 2020, 16:54
Replies: 145
Views: 50,410
Posted By IFMU

Sounds worthy of its own thread. Would be...

Sounds worthy of its own thread. Would be interesting to find out the direct cause of the accident in this thread.
Forum: Rotorheads
30th Jun 2020, 22:14
Replies: 145
Views: 50,410
Posted By IFMU

My recollection is a little hazy but I thought...

My recollection is a little hazy but I thought everything after Comanche was 2 axis cyclic. We had an old 3 axis controller we used for the X2 but we didn't use the yaw axis, just conventional pedals.
Forum: Jet Blast
21st Jun 2020, 18:18
Replies: 21
Views: 1,794
Posted By IFMU

Exactly! Excellent explanation.

Exactly! Excellent explanation.
Forum: Jet Blast
21st Jun 2020, 15:02
Replies: 21
Views: 1,794
Posted By IFMU

You have some control over this by shifting your...

You have some control over this by shifting your weight.
Forum: Jet Blast
21st Jun 2020, 15:00
Replies: 21
Views: 1,794
Posted By IFMU

My son and I built a small hovercraft. This one...

My son and I built a small hovercraft. This one doesn't have sufficient thrust or lift to operate like the OP intends. But I'd like to do my part on the thread drift:
https://youtu.be/ygoAByCeNkY...
Forum: Rotorheads
12th Jun 2020, 00:10
Replies: 145
Views: 50,410
Posted By IFMU

That is awesome. The latest press really...

That is awesome.

The latest press really doesn't answer any questions. As a former FBW guy I'd like to know.
Forum: Jet Blast
30th May 2020, 19:40
Replies: 277
Views: 253,381
Posted By IFMU

Well, that was awesome.

Well, that was awesome.
28th May 2020, 03:01
Replies: 211
Views: 111,891
Posted By IFMU

The easiest way to avoid a structural resonance...

The easiest way to avoid a structural resonance with one of the N/rev frequencies is to have your engineers design the structure to hit it. In my experience, including through 2005, is that it is not...
Forum: Jet Blast
21st Apr 2020, 14:42
Replies: 23
Views: 1,881
Posted By IFMU

I'm from New England. Practically the same...

I'm from New England. Practically the same right? Just one of the things we got from our English forefathers.
Forum: Jet Blast
26th Mar 2020, 21:49
Replies: 22,040
Views: 3,606,631
Posted By IFMU

Did somebody here order a hamster wheel? ...

Did somebody here order a hamster wheel?
https://youtu.be/G3i74UaJTMY
Forum: Rotorheads
19th Mar 2020, 22:00
Replies: 30
Views: 3,327
Posted By IFMU

I just shared that with a co-worker. When I...

I just shared that with a co-worker. When I hired into Sikorsky, they had stopped handing that book out to new hires, and had other "training" instead. I have my dad's hardcopy.
Forum: Jet Blast
3rd Mar 2020, 23:53
Replies: 28
Views: 2,088
Posted By IFMU

So when I heat up steel, electrons move to a...

So when I heat up steel, electrons move to a higher orbit due to the energy added. Then when it drops back, it emits a photon of light if I remember my physics. There is a change of mass for a...
Forum: Jet Blast
1st Mar 2020, 19:32
Replies: 28
Views: 2,088
Posted By IFMU

Are the batteries nuclear and converting matter...

Are the batteries nuclear and converting matter to energy? Or is the reaction in the battery freeing up energy which is used to push electrons around the loop?
Forum: Rotorheads
29th Feb 2020, 13:31
Replies: 33
Views: 5,733
Posted By IFMU

I had not realized John Dixson was a millennial!

I had not realized John Dixson was a millennial!
Forum: Rotorheads
23rd Feb 2020, 22:11
Replies: 61
Views: 15,095
Posted By IFMU

But that does not address common mode software or...

But that does not address common mode software or firmware failures.
Forum: Rotorheads
23rd Feb 2020, 14:34
Replies: 33
Views: 5,733
Posted By IFMU

Cool videos - thanks for the post!

Cool videos - thanks for the post!
Forum: Rotorheads
23rd Feb 2020, 14:28
Replies: 61
Views: 15,095
Posted By IFMU

Well said bellblade2014 and captures my thoughts...

Well said bellblade2014 and captures my thoughts closely. Still cool they built and flew it. Taking IR&D to flight test is a sign of a healthy engineering department and good leadership.
Forum: Rotorheads
26th Jan 2020, 16:48
Replies: 171
Views: 68,925
Posted By IFMU

Because it is in flight test, they will be doing...

Because it is in flight test, they will be doing flights at many different power settings on the rotor, prop, plus horizontal tail position. Each one will give a different attitude for a given...
Forum: Jet Blast
1st Jan 2020, 15:48
Replies: 68
Views: 6,668
Posted By IFMU

Sounds more like sign - magnitude to me.

Sounds more like sign - magnitude to me.
Forum: Rotorheads
16th Dec 2019, 15:01
Replies: 171
Views: 68,925
Posted By IFMU

The translational airspeed region was not as...

The translational airspeed region was not as challenging as high speed flight in the X2. In fact for most of the lower speed region the X2 vibes could be managed without AVC using only classical...
Forum: Rotorheads
13th Dec 2019, 03:26
Replies: 171
Views: 68,925
Posted By IFMU

We didn't have a clutch on the X2. But you would...

We didn't have a clutch on the X2. But you would clutch up the prop at flat pitch, not MCP. Once it was clutched up you would roll in the prop pitch and start ramping up the power. I am not sure I...
Forum: Rotorheads
12th Dec 2019, 16:57
Replies: 171
Views: 68,925
Posted By IFMU

The X2 vibe levels were not brutal, and in fact...

The X2 vibe levels were not brutal, and in fact were most benign at hover. This is when you would not be spinning the rear gearbox.

Please name one gearbox where the oil is warmed up prior to...
29th Nov 2019, 11:28
Replies: 27
Views: 4,032
Posted By IFMU

Rudy Opitz was a member of Nutmeg Soaring and one...

Rudy Opitz was a member of Nutmeg Soaring and one of my instructors. It does not say it in his obituary but he flew one of the gliders to land troops on Fort Eben-Emael.
Obituary for Paul Rudolf...
Forum: Jet Blast
23rd Nov 2019, 15:07
Replies: 74
Views: 8,682
Posted By IFMU

I've replaced all the fluorescent tubes in my...

I've replaced all the fluorescent tubes in my hangar and a couple at the house with LED tubes. I get the ones that work without the ballast and rewire the fixture. They are awesome....
Forum: Rotorheads
16th Nov 2019, 12:40
Replies: 171
Views: 68,925
Posted By IFMU

That's why they don't make decisions based on...

That's why they don't make decisions based on looks! This cracks me up.
Showing results 1 to 25 of 1000
 


 
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