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chris455
03-15-2004, 03:27 PM
I wanted to see how accurate the cockpit instrumentation is in the P-47.

I resolved to deliberately "cook" the engine to see what my intuments would tell me.

Went to water injection, 110% power, and waited. There was only a slight increase in oil temp (almost indiscernable). After what seemed like 10 or so minutes, The HUD told me ENGINE OVERHEAT!, but the dash told me nothing. Manifold pressure was steady @ 50"hg, oil temp remained in a slightly elevated state,and the aircraft continued to hum along at a steady speed and altitude (460kph, 3.0k)

Then someting weird occured.

My oil PRESSURE dropped off alarmingly, my engine beagn to make the familiar "screeching" noise, but the HUD then said:
ENGINE NORMAL
I had the radiator still closed, and had done nothing to relieve the overheating (this was a test, remember)and suddenly my engine, wheezing and screeching (but not losing power) is "NORMAL"?.

This raises a few questions, especailly for "Full Real" sceanarios.

How reliable are the instruments in FB?

Why does the HUD log seemingly contradict what the aircraft is experiencing?
Do these things vary from AC to AC, or are they global?

I almost forgot to mention, that other than the HUD "telling" me I was overheating the engine, and the obligatory screeching noise, there was no "practical" effect to my treatment of the engine. It continued to produce full power until I had to discontinue the test.

Back to do some more tests-

PS I discovered that what is labled "OIL TEMP" should actually be cylinder head temperature gauge. http://ubbxforums.ubi.com/images/smiley/16x16_smiley-surprised.gif
S!

http://members.cox.net/miataman1/P47.jpg

[This message was edited by chris455 on Fri March 19 2004 at 12:52 PM.]

chris455
03-15-2004, 03:27 PM
I wanted to see how accurate the cockpit instrumentation is in the P-47.

I resolved to deliberately "cook" the engine to see what my intuments would tell me.

Went to water injection, 110% power, and waited. There was only a slight increase in oil temp (almost indiscernable). After what seemed like 10 or so minutes, The HUD told me ENGINE OVERHEAT!, but the dash told me nothing. Manifold pressure was steady @ 50"hg, oil temp remained in a slightly elevated state,and the aircraft continued to hum along at a steady speed and altitude (460kph, 3.0k)

Then someting weird occured.

My oil PRESSURE dropped off alarmingly, my engine beagn to make the familiar "screeching" noise, but the HUD then said:
ENGINE NORMAL
I had the radiator still closed, and had done nothing to relieve the overheating (this was a test, remember)and suddenly my engine, wheezing and screeching (but not losing power) is "NORMAL"?.

This raises a few questions, especailly for "Full Real" sceanarios.

How reliable are the instruments in FB?

Why does the HUD log seemingly contradict what the aircraft is experiencing?
Do these things vary from AC to AC, or are they global?

I almost forgot to mention, that other than the HUD "telling" me I was overheating the engine, and the obligatory screeching noise, there was no "practical" effect to my treatment of the engine. It continued to produce full power until I had to discontinue the test.

Back to do some more tests-

PS I discovered that what is labled "OIL TEMP" should actually be cylinder head temperature gauge. http://ubbxforums.ubi.com/images/smiley/16x16_smiley-surprised.gif
S!

http://members.cox.net/miataman1/P47.jpg

[This message was edited by chris455 on Fri March 19 2004 at 12:52 PM.]

Future-
03-15-2004, 03:39 PM
Another more obvious problem are the fuel gauges... on some planes, they don't seem to be working at all (Go-229, YP-80), cause even after a longer period of flight at high power, I still read fuel reserves being at 100%/full... even if I only took 50% with me. But even if the fuel gauges "only" show a relative fuel load (meaning, if I load 50%, that is 100% on the gauge of total available fuel), there should be some decrease over time, right?

S!

- Future

Commanding Officer of the 530th Bomb Squad
380th Bomb Group 5th AF USAAF

http://invisionfree.com:54/40/30/upload/p1083.jpg

Visit us at http://members.tripod.com/tophatssquadron , home of the 310th FS and the 380th BG

Snootles
03-15-2004, 03:42 PM
Funny, the YP-80A fuel gauge always worked for me...

rbstr44
03-15-2004, 10:24 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Future-:
Another more obvious problem are the fuel gauges... [ellided]
<HR></BLOCKQUOTE>

I do not have a quote or link for who said it here, but someone once suggested that the fuel guages only register fuel use during the last 1/3 or so of remaining the fuel supply. Try flying with 25% fuel and see if you notice any difference. http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif[/img] ]

Displacement through a Slab of Glass
http://sol.sci.uop.edu/~jfalward/refraction/displacementcolorthreebeams.jpg
[I]Entering and exiting rays are displaced
from each other, but parallel.
Refraction of Light (http://sol.sci.uop.edu/~jfalward/refraction/refraction.html)

Brain32
03-16-2004, 12:08 PM
Is there a Japanese aircraft cockpit refrence manual?

chris455
03-16-2004, 12:57 PM
Below is a link to the Ki-84s instruments, there is one for the Zero at the same sight.
S!

http://www.partizanska-eskadrila.com/reference/ki84.htm

http://members.cox.net/miataman1/P47.jpg

TILLIO
03-16-2004, 04:14 PM
look at this
http://www.partizanska-eskadrila.com/reference/cockpit.htm
http://ubbxforums.ubi.com/images/smiley/16x16_smiley-wink.gif

xTHRUDx
03-16-2004, 05:16 PM
the spit fuel guages don't work as well (any model)

PE_Mosor
03-17-2004, 03:19 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by xTHRUDx:
the spit fuel guages don't work as well (any model)<HR></BLOCKQUOTE>


Well, they work for me!

chris455
03-19-2004, 01:53 PM
Bump.

http://members.cox.net/miataman1/P47.jpg

mike_espo
03-19-2004, 05:59 PM
the fiat g.50 does not even have a fuel guage. Only a fuel pressure guage. Goes to zero when your out of fuel:/