J-20 5th Gen Fighter Thread IV (Closed to posting)

[delft]

I'm not sure if it is to prevent spins, as much as to recover the aircraft that are not responding to conventional spin recovery techniques, lots of trainers are intentionally spun as an integral part of training in order to teach recovery technique, the F-15, F-18, Su-27, Mig 29, F-22 would likely all spin and recover nicely, although spinning any fighter aircraft would be potentially hazardous without lots of altitude, I'm not so sure when it comes to an aft mounted delta with canards. Large aircraft are a totally different matter, although I have heard that someone rolled the Concorde, no one would intentionally stall/spin a larger aircraft, although the 707 prototype was rolled by the chief test pilot for fun!

As Master Delft has alluded to, testing in the 30s, 40s, 50s, and 60s was anything but boring, and no chief test pilot would roll anything unless he was retiring.

Back to the J-bird, we really have NO information about any test flights other than the few aileron rolls we saw with 2001/2002, although most fighter aircraft are rather routinely rolled, in WW II after returning from a mission a fighter pilot might perform a "victory roll" one for each enemy aircraft downed, they were forbidden due to the high attrition rate or the victory rollers under some commands... Brat

I also remember reading in the memoirs of Captain Eric Brown R.N. about the accident in 1948 that cost the life of Robert Kronfeld (

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) when an experimental glider was flown with the center of gravity too far aft. I was aghast.
Eric Brown had a long carrier as test pilot. See

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.

 

[TerraN_EmpirE]

The Raptor program was originally aimed to replace the eagle and strike eagle so as intended yes. However things changed. So in the end the answer comes down to if you happen to have another aircraft if you dont then Raptor is your plane.

 

[Air Force Brat]

I also remember reading in the memoirs of Captain Eric Brown R.N. about the accident in 1948 that cost the life of Robert Kronfeld (

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) when an experimental glider was flown with the center of gravity too far aft. I was aghast.
Eric Brown had a long carrier as test pilot. See

Please, Log in or Register to view URLs content!

.

One thing that has made the F-15 such a fine flying and safe airplane are its rather simple uncomplicated manners, as with any high performance aircraft it will bite, but you would really have to provoke it, and one of the reasons I was initially unswayed from eagle mania by the Raptor, but over time the fine flying qualities of the Raptor and advance aerodynamics did win me over. A lot of aircraft suffer an aft traveling cg as fuel is burned unless it is tanked forward, so they all have a few tricks up there sleeve, an aft cg is a for sure invitation to a bad deal. Brat

 

[Quickie]

I'm not sure if it is to prevent spins, as much as to recover the aircraft that are not responding to conventional spin recovery techniques, lots of trainers are intentionally spun as an integral part of training in order to teach recovery technique, the F-15, F-18, Su-27, Mig 29, F-22 would likely all spin and recover nicely, although spinning any fighter aircraft would be potentially hazardous without lots of altitude, I'm not so sure when it comes to an aft mounted delta with canards. Large aircraft are a totally different matter, although I have heard that someone rolled the Concorde, no one would intentionally stall/spin a larger aircraft, although the 707 prototype was rolled by the chief test pilot for fun!

As Master Delft has alluded to, testing in the 30s, 40s, 50s, and 60s was anything but boring, and no chief test pilot would roll anything unless he was retiring.

Back to the J-bird, we really have NO information about any test flights other than the few aileron rolls we saw with 2001/2002, although most fighter aircraft are rather routinely rolled, in WW II after returning from a mission a fighter pilot might perform a "victory roll" one for each enemy aircraft downed, they were forbidden due to the high attrition rate or the victory rollers under some commands... Brat

Obviously the spin chute is only used for recovery since it can only be deployed once. What I meant was that having more than one anchor for the chute will prevent the chute itself from spinning with respect to the aircraft i.e. aircraft's longitudinal axis.

 

[Air Force Brat]

Obviously the spin chute is only used for recovery since it can only be deployed once. What I meant was that having more than one anchor for the chute will prevent the chute itself from spinning with respect to the aircraft i.e. aircraft's longitudinal axis.

Roger That, It has multiple anchors but, that is to prevent its departure from the aircraft and maintain its integrity, I believe I read the F-35 anchor weighs 1000lbs, there would obviously be some side loads on the anchor if the aircraft was in a full blown spin. Also many aircraft may have an up-down as to pitch oscillation as the aircraft hunts for a stable condition, it is trying to spin, you are attempting to recover, also as master delft has mentioned the cg is trying to shift aft, and you are trying to prevent that with the application of forward stick to break the stall, and opposite rudder to stop the rotation..
During an approach to the power on stall, the deck angle got rather steep on a pre leading edge cuff Cessna 150, I gently relaxed the pitch, as the nose was coming down, I intended to fly out of the nearly stalled condition, as the nose reached the horizon, I very gently applied aft stick to stop its downward trajectory and was rewarded with a full break stall, departing into a 1/4 turn spin to the left, forward stick and right rudder broke the stall and stopped the spin, but it was an eye opener, and my passenger was not happy. Brat

 

[delft]

Roger That, It has multiple anchors but, that is to prevent its departure from the aircraft and maintain its integrity, I believe I read the F-35 anchor weighs 1000lbs, there would obviously be some side loads on the anchor if the aircraft was in a full blown spin. Also many aircraft may have an up-down as to pitch oscillation as the aircraft hunts for a stable condition, it is trying to spin, you are attempting to recover, also as master delft has mentioned the cg is trying to shift aft, and you are trying to prevent that with the application of forward stick to break the stall, and opposite rudder to stop the rotation..
During an approach to the power on stall, the deck angle got rather steep on a pre leading edge cuff Cessna 150, I gently relaxed the pitch, as the nose was coming down, I intended to fly out of the nearly stalled condition, as the nose reached the horizon, I very gently applied aft stick to stop its downward trajectory and was rewarded with a full break stall, departing into a 1/4 turn spin to the left, forward stick and right rudder broke the stall and stopped the spin, but it was an eye opener, and my passenger was not happy. Brat

A 1000 lbs seems to me pretty heavy. Wouldn't that be the force the anchor is designed for? Otherwise you would be moving your c.g. significantly aft.

 

[ladioussupp]

I am wondering what else the side bays of J-20 carries if not (dual-use) AAM? Since the rails can expose somethings in the air, is it possible to put some kinds of sensors in the side bays? For example, a ESM/EA pod. Because EW pod antenna is a good RCS generator, J-20 may hide the EW pod until designated area or circumstances.

How do you guys think?

 

[Lion]

I am wondering what else the side bays of J-20 carries if not (dual-use) AAM? Since the rails can expose somethings in the air, is it possible to put some kinds of sensors in the side bays? For example, a ESM/EA pod. Because EW pod antenna is a good RCS generator, J-20 may hide the EW pod until designated area or circumstances.

How do you guys think?

Then you will expose your RCS unnecessary.

 

[siegecrossbow]

I am wondering what else the side bays of J-20 carries if not (dual-use) AAM? Since the rails can expose somethings in the air, is it possible to put some kinds of sensors in the side bays? For example, a ESM/EA pod. Because EW pod antenna is a good RCS generator, J-20 may hide the EW pod until designated area or circumstances.

How do you guys think?

I don't see why the said sensors couldn't be integrated within the fuselage in the same fashion as the F-35. If you really have to do this, you can cocoon them and mount them on external pylons, similar to how detachable gun-pods are placed on F-35B and C variants.

 

[drunkmunky]

What kind of budget do we 'guess/think' that the J-20 has?

The new missile launch door is very smart, but it looks like there are a fair number of components.
I'd love to see this machine listed in action for 5-8 years so they can find out the operational cost, hopefully, economic enough so that they can have 200+