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104zip
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 Posted: Mar 13, 2011 - 09:11 AM
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Newbie
Joined: Mar 13, 2011 - 08:37 AM
Posts: 1
Status: Offline
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Hello!
First post here.
Been enjoying the Zipper threads. Father flew the CF-104 in the late 60's out of CFB Cold Lake so I have been fan for quite some time.
Simply amazing how much potential has packed into the airframe/design of so long ago. A shame the italians no longer fly them.
What is the VMAX of the tip tanks?
Are the tip tanks jettison-able and if so, what is the speed limit?
Regarding FL730 @ M2.0, Walt BJ was burning 100 lbs of fuel a minute at 3/4 AB. Would the fuel flow be substantially less if the J79 was replaced with a modern engine like an "F-119 type" that was capable of M2.0 @ FL600 in mil power?
Am I wrong to state that the F-22 supercruises at M2.0 at 60,000 ft?
I curious to know how much fuel would be burned if the 104 was at FL600 and M2.0 without using burner. Would the flow go from 100 ppm as stated above to maybe 50 ppm in mil power?
I do realize this if difficult to answer seeing as the J79 isn't designed to propel the 104 at FL600 and M2.0 in mil power. I am interested to know fuel burn rates at high altitude and am using the 104 as an example.
And, if we could stuff a 414 EDE (26,500 lbs) in the 104, what affect would this have on high alt performance? The 79 turbojet would still outperform it? |
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Sponsor
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 Posted: Jun 20, 2013 - 9:37 AM
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F-16.net Sponsor
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Lieven
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Posted: Aug 06, 2011 - 03:07 PM
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F-16.net Webmaster
Joined: May 23, 2003 - 04:44 PM
Posts: 2998
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sprstdlyscottsmn
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Posted: Aug 08, 2011 - 04:39 PM
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Elite 1K
Joined: Mar 10, 2006 - 01:24 AM
Posts: 1200
Location: Phoenix, Az
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100 ppm at Mach 2.0 is already incredible, the question is how much gas was left after getting there?
About your curiosity of replacing the J79 with F414 EPE, I have has the same question myself. does the amazing high/fast performance of J79 counter the 50%+ increase in base thrust? F414 also weighs in 2,000 lbs less than J79 resulting in improved climb and turning, especially subsonic. |
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James,
-Pilot
-Aerospace Engineer
-Army Medic (WTF?)
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alfakilo
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Posted: Aug 14, 2011 - 04:08 PM
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Newbie
Joined: Mar 22, 2011 - 07:01 PM
Posts: 12
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TC
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Posted: Aug 16, 2011 - 11:49 AM
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F-16.net Moderator
Joined: Jan 14, 2004 - 07:06 AM
Posts: 4006
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| Hopefully, our resident Zipper Driver, JR007 will come on and spot this thread. He has much knowledge on the subject. |
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"He counted on America to be passive...He counted wrong." -- President Ronald Reagan
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sprstdlyscottsmn
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Posted: Aug 16, 2011 - 06:38 PM
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Elite 1K
Joined: Mar 10, 2006 - 01:24 AM
Posts: 1200
Location: Phoenix, Az
Status: Offline
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| Thanks for the link alfakilo! Man that zipper sure could move. |
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James,
-Pilot
-Aerospace Engineer
-Army Medic (WTF?)
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JR007
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Posted: Sep 11, 2011 - 05:53 AM
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Forum Veteran
Joined: Sep 23, 2003 - 03:46 PM
Posts: 539
Status: Offline
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104zip,
The last time a Starfighter was at Cold Lake was in 2004, I flew it there, and she was a CF-104D. 12-632
VMax with tips is 750 KEAS or Mach 1.8
Jettison Limit for the Tip Tanks is Mach .9 There is a Note in the Dash 1 that in an emergency, empty tip tanks may be jettisoned at supersonic speeds. Though it recommends trying to jettison them at or below Mach 1.5.
I am not familiar with the GE 414, don’t even know if it would fit in the airframe, so that one I can’t answer.
Fly Fast, Zipper Fast!!!! |
_________________
Burning debris never reversed on anyone…
JR
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