P51d 440mph at 30.000ft Interested ?

S

SLIP STREAM

M.I.A.
check the gauges guys.its not photoshoped. i've been flying this air file for over three years.but it had a high speed full power banking climb glitch over 420 mph.the tail would flip around end over end.when lewis put his file up he had one number that looked better than mine so i pluged it in. it corrected it thanks lewis.so i decided it could go up if theres interest. it is set up to preform at high altitude up to 46.000 ft. 440mph at 30.000.the handleing has also been delt with.it includes all the effects,lighting,night lit gauges,iluminated gun sight,air brakeing.+additional weapons.hopefully this will cure the out of the box preformance gripes.post here let me know.
 
Hi jeff,

I dont know how I mist this thread first time round.

I'm deffinately interested.

Have you got anything for the Tempest and typhoon?

regards Rob.
 
A more realistic Typhoon .air file would be most welcome! (although stonking performance at 30000ft would not be realistic .... :monkies:)
 
SLIP STREAM said:
check the gauges guys.its not photoshoped. i've been flying this air file for over three years.but it had a high speed full power banking climb glitch over 420 mph.the tail would flip around end over end.when lewis put his file up he had one number that looked better than mine so i pluged it in. it corrected it thanks lewis.so i decided it could go up if theres interest. it is set up to preform at high altitude up to 46.000 ft. 440mph at 30.000.the handleing has also been delt with.it includes all the effects,lighting,night lit gauges,iluminated gun sight,air brakeing.+additional weapons.hopefully this will cure the out of the box preformance gripes.post here let me know.
Click to expand...

With all due respect 440 w/ drop tanks I don't think so.
 
Jeff,

It is great to see members of our community pushing the envelope and continuing to experiment in an effort to improve CFS 3 for all of us.

I will share some thoughts with you that may help you with your work. I have logged close to 5,000 hrs mostly SEL with some turbocharged engines.

1. Airspeeds IAS(Indicated Air Speed) vs TAS(True Air Speed) - Most published airspeeds in aircraft performance are listed as TAS at altitude while IAS is used for manuvering, stall, gear and flaps. The cockpit ASI should always read IAS.
2. Indicated airspeed drops off steadily as altitude is increased due to air density. It is noticeable even at crusing altitudes under 10,000 ft in light aircraft. For example a TAS of 400 mph may only generate a IAS of 325 mph at 30,000 ft.
3. Turbo chargers and Superchargers will only maintain a certain pressure altitude and cannot generate sea level pressure at high altitudes. Therefore I would refer to the published data for the aircraft in question to match the cockpit MP with the accurate data at a given power setting and altitude. I know that my Cessna 180 at 7,500 ft would only generate 23 inches of MP at full throttle. It would cruise at 155 MPH TAS with a IAS of about 140 mph.
4. The reason that aircraft fly faster at high altitude is less lift/drag, as the air becomes thinner there is a formula for calculating the changes in the lift/drag ratio for a given aircraft at various altitudes.
5. Propellers loose a lot of performance at altitude and there are also formulas that model this as well.
6. Finally weight affects the flight performance of an aircraft as well as external pylons and weapons. The O-1 was severely affected when loaded with 2.75" rocket launchers.

I hope all of this helps as Gregory and I had a lot of discusions in the past on these issues as he built his 1% models.

Keep experimenting and working away, just remember that FMs are the most complicated thing you could have chosen.:icon_lol:

Best Regards

Steve
 
realistically impossiable, but fun idea! i'll take you up on the offer.
 
Steve I am an extreme rookie next to you with only 300+ hours of personal flying time under my belt and the majority of that is PIC time. I have a couple thousand more hours in various rotory and fixed wing aircraft as a crew member. I have a very good idea of how most aircraft feel and behave in actual flight. Many of the stock models and some of the 1% models have quirky flight characteristics that are un-natural in real flight. Most of the stock models don't fly anywhere near as fast as the known speeds of the aircraft and it gets even slower at altitude where the best performance usually occured. IAS does decrease with altitude but the difference between IAS and TAS is much greater above 10,000 ft. From Sea level up to 10,000 ft the aircraft performance (piston engine) was largely the same. I like to adjust the FM's so the aircraft's known airspeed at 10,000 ft will be the top speed. For most aircraft that is only slightly better than what it would be say at 30,000 ft. I am trading historical accuracy of manifold pressure and propr thrust ratio for historical airspeed and sometimes handling. To me though if a CFS3 plane does not fly as fast as the original then how historically accurate is that, even if all engine parameters match?
 
lewis11777 said:
Steve I am an extreme rookie next to you with only 300+ hours of personal flying time under my belt and the majority of that is PIC time. I have a couple thousand more hours in various rotory and fixed wing aircraft as a crew member. I have a very good idea of how most aircraft feel and behave in actual flight. Many of the stock models and some of the 1% models have quirky flight characteristics that are un-natural in real flight. Most of the stock models don't fly anywhere near as fast as the known speeds of the aircraft and it gets even slower at altitude where the best performance usually occured. IAS does decrease with altitude but the difference between IAS and TAS is much greater above 10,000 ft. From Sea level up to 10,000 ft the aircraft performance (piston engine) was largely the same. I like to adjust the FM's so the aircraft's known airspeed at 10,000 ft will be the top speed. For most aircraft that is only slightly better than what it would be say at 30,000 ft. I am trading historical accuracy of manifold pressure and propr thrust ratio for historical airspeed and sometimes handling. To me though if a CFS3 plane does not fly as fast as the original then how historically accurate is that, even if all engine parameters match?
Click to expand...

Lewis, I don't have a problem with what you guys are doing, any mods are welcome. Also there is no perfectly accurate FM in CFS3 all are compromises. The stall behavior models on almost all of the aircraft are not accurate.

I would just like to see the aircraft top speed expressed in TAS and not IAS. The model aircraft will be covering ground in CFS 3 based on it's TAS (Z key) not IAS.The P-51D had a published top speed of 437 mph (some sources) at 25,000 ft. I am not sure what the AvHistory P-51 D will do but will check it.

Keep up the good work

Steve
 
Lewis,

The P-51 in ETO was flying at a TAS of 426 mph at 100% power at 25,000 ft. The IAS was 300 mph. screenshot attached,

Steve
 
I'm watching. isn't free speech and freedom to chose great !!! i'm looking for the big picture concensus on all the flight models.we lose alot of people because as posted "the flight models suck".
if more members want to stay with the status quo, going by TAS(Z button) we'll stay that way. if more members want to go by IAS,(cockpit gauges)then we'll change.do we want more new players and participants that can fly the way they expected to.or lose people because of the bigest complaint, fm's. i'm sending two carrier plane models for testing and will wait for that opnion. but please keep posting i'd like to hear from everyone before anything is decided.
 
That's great Slip Stream but what about the P-61? Ha-ha, just kidding! :bump: The sim world engine has it's shortcomings but it's been quite good so far. The frustration was more with what was released as opposed to what was possible. The stall bugs are a real killer. I hate when you get 'departed" in a Hurricane after a long romp and a bunch of kills. Realism gets smashed and your denied a peacefull cool down and a nice immersive landing. Basically have to quit to menu. Ppbblblt.
:blind:
 
SLIP STREAM said:
I'm watching. isn't free speech and freedom to chose great !!! i'm looking for the big picture concensus on all the flight models.we lose alot of people because as posted "the flight models suck".
if more members want to stay with the status quo, going by TAS(Z button) we'll stay that way. if more members want to go by IAS,(cockpit gauges)then we'll change.do we want more new players and participants that can fly the way they expected to.or lose people because of the bigest complaint, fm's. i'm sending two carrier plane models for testing and will wait for that opnion. but please keep posting i'd like to hear from everyone before anything is decided.
Click to expand...

Jeff, I was only speaking with regard to ETO aircraft, I think variety is a good thing and I think some players might prefer to see the ASI render differently. At any rate if it is fun, let people have it. I think you should mod it the way you like it and offer it not the way you think someone else would. As long as we are all enjoying what we are doing that is what is truly important.

I am just pleased to see someone actually playing around and trying to mod something.

Best Regards,

steve
 
hi squif lol thats dangerous daves gig praying for him to finish and put it up doesn't seam to be working. maybe we should dance around chant and throw chicken bones.or a bribe :monkies:
and i one hundred percent agree with you on the hurricane i haven't even tackeled that one yet.
no problem steve i want everybodys opinion on this even you new guys nows the time to type!!
the posted p-51 is my personal high altitude 109 and 262 butt kicker test bed. many other planes have been adjusted.especialy the carrier planes,yeaaaah. once outside testing is finished how to distrubute will be decided.we have been flying cessnas for over 5 years a little while longer wont hurt
if their wanted
 
Slip, where did you get the P-61 for your avatar? Is it one for CFS3 and if so, where can it be found? I gotta have one.... please.
 
gt182 its at ww2 kakoulak gallery. you'll find it in us airforce.fantastic original color photos.all different nations and aspects of ww2
 
yes dangerous dave boyington he checks in now and then he just posted last month he might start finishinig what he started ? his avatar is a mossie he was building
 
Thanks Slip for the link. I'll check it out tomorrow. It's off to bed right now. Had a long day at the Dover Air Museum Car Show today. I got to sit in the cockpit of a C-141B and go thru a KC-97. Awesome aircraft to say the least. I'll post some pics in the Newshawks tomorrow too.

Ok, back to the topic at hand. Sorry for wandering OT. :redface:
 
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