BrendAn Posted July 2 Share Posted July 2 5 hours ago, red750 said: From Flying magazine, Nov 2021.. After years of exploring the dream of a jet-powered Aerostar, Aerostar Aircraft of Boise, Idaho, is test-flying a Pratt & Whitney re-engined airplane. Company president Jim Christy flew the twinjet to Oshkosh, Wisconsin, for AirVenture in July. The airplane, which has very little time on it, is still a work in progress, though the most critical part, the engines and their mounts, are fully engineered. Christy said that even though he has been limited to 28,000 feet in the non-RVSM-approved airplane, the performance he has been seeing — 380 knots true at high fuel burns — will translate into better than 400 knots at 35,000 feet (the expected ceiling) with the miserly fuel flows more closely associated with the P&W 615 engines (the same engines as on the Cessna Citation Mustang). With the Aerostar’s nice cabin and great flying manners, the combination could be a winner, Christy said. RARE BIRD ALERT🚩 The twinjet Aerostar came by Sandpoint today, and I... WWW.FACEBOOK.COM RARE BIRD ALERT🚩 The twinjet Aerostar came by Sandpoint today, and I had to get a shot of the takeoff run. This aircraft is an active testbed for jet conversions owned by Aerostar Aircraft Corp, the... the aerostar had a vne of 244knts. what do they have to do to the airframe to get 400knts without structural damage. 1 Link to comment Share on other sites More sharing options...
Red Posted July 2 Share Posted July 2 8 hours ago, BrendAn said: the aerostar had a vne of 244knts. what do they have to do to the airframe to get 400knts without structural damage. Vne will be an given at indicated airspeed?, 244 knots indicated is over 400knots TAS at 35000' 2 Link to comment Share on other sites More sharing options...
BrendAn Posted July 3 Share Posted July 3 10 hours ago, Red said: Vne will be an given at indicated airspeed?, 244 knots indicated is over 400knots TAS at 35000' thanks red, so the higher you go the higher the vne goes as the air gets thinner, Link to comment Share on other sites More sharing options...
skippydiesel Posted July 3 Share Posted July 3 9 minutes ago, BrendAn said: thanks red, so the higher you go the higher the vne goes as the air gets thinner, I always thought, with increasing altitude, for the same indicated speed, true airspeed goes up. So if Vne is 244 knots, indicated, that remains as the aircrafts safe limit, even if true is a lot higher - something to do the flutter. 1 Link to comment Share on other sites More sharing options...
Marty_d Posted July 3 Share Posted July 3 (edited) Is True airspeed indicated on any instruments or just calculated / shown on GPS? (Not that it's going to make much difference in a 701 😆) Edited July 3 by Marty_d 2 Link to comment Share on other sites More sharing options...
BrendAn Posted July 3 Share Posted July 3 16 minutes ago, skippydiesel said: I always thought, with increasing altitude, for the same indicated speed, true airspeed goes up. So if Vne is 244 knots, indicated, that remains as the aircrafts safe limit, even if true is a lot higher - something to do the flutter. Basic VNE is an indicated airspeed but flutter is affected by TAS. The velocity of air thats actually going over the control surfaces. As you go higher generally the TAS needs to be reduced with an increase in altitude for stability. While you might have the same impact velocity (IAS) youll have less stabilizing static pressure on the sides of the aircraft. Thus a reduction in IAS to keep the aircraft in safe margins. For some aircraft it's not a set VNE TAS either. For instance, in the B407 VNE is 140 KIAS all the way up to 4,000 ft at 0 degrees. Then IAS needs to be reduced with a corresponding TAS. Also for some aircraft like business jets or helicopters you have Mach limiting TAS as you get into colder air at higher altitudes. found this snippet 1 1 Link to comment Share on other sites More sharing options...
BrendAn Posted July 3 Share Posted July 3 IAS is not the speed of the air over the wing. TAS is the speed of the air over the wing. Example: You are flying at 130,000 feet with only 3 air molacules per square centimeter at a TAS of 1,000 kts. You fly past a point in the air marked by a floating balloon. With everything staying constant for one hour the balloon will be 1,000 nautical miles away and the whole time the airspeed indicator will have read 1 or 2 kts. The air molacules go over the wing at a velocity of a 1,000 kts (TAS) but the difference in pressure with only 3 molacules per square centimeter give a very low indication (IAS). 1 Link to comment Share on other sites More sharing options...
BrendAn Posted July 3 Share Posted July 3 Just now, BrendAn said: IAS is not the speed of the air over the wing. TAS is the speed of the air over the wing. Example: You are flying at 130,000 feet with only 3 air molacules per square centimeter at a TAS of 1,000 kts. You fly past a point in the air marked by a floating balloon. With everything staying constant for one hour the balloon will be 1,000 nautical miles away and the whole time the airspeed indicator will have read 1 or 2 kts. The air molacules go over the wing at a velocity of a 1,000 kts (TAS) but the difference in pressure with only 3 molacules per square centimeter give a very low indication (IAS). plenty of info on google but seems to be a lot of differing views on what is correct. unusual for the internet. 1 1 Link to comment Share on other sites More sharing options...
Thruster88 Posted July 3 Share Posted July 3 21 minutes ago, Marty_d said: Is True airspeed indicated on any instruments or just calculated / shown on GPS? (Not that it's going to make much difference in a 701 😆) Any EFIS with a temperature probe or old style ASI with the movable temperature and pressure sub scale will show true airspeed. 3 Link to comment Share on other sites More sharing options...
Red Posted July 3 Share Posted July 3 TAS is a calculation, it's can't be directly measured. As far as the aircraft is concerned it always experiences Forces relative to its indicated airspeed. 1 Link to comment Share on other sites More sharing options...
BrendAn Posted July 3 Share Posted July 3 My buddy the U-2 pilot points out that during much that turns put one wing in mach buffet and the other in stall buffet. this is interesting. 2 types of stall at the same time. 1 Link to comment Share on other sites More sharing options...
skippydiesel Posted July 3 Share Posted July 3 I don't think having the theory back to front, will worry me and my Sonex too much up to 10,000 ft as long as I keep my speed below 130 knots on descent 1 Link to comment Share on other sites More sharing options...
BrendAn Posted July 3 Share Posted July 3 1 hour ago, skippydiesel said: I don't think having the theory back to front, will worry me and my Sonex too much up to 10,000 ft as long as I keep my speed below 130 knots on descent i don't think you do have it back to front from the stuff i read Link to comment Share on other sites More sharing options...
red750 Posted July 4 Author Share Posted July 4 The American Gyro AG-4 Crusader is a small twin engine aircraft. The aircraft was designed as the Shelton Flying Wing in 1933 by Thomas Miles Shelton. The AG-4 was developed using wind tunnel tests. The American Gyro AG-4 Crusader is an aluminum skinned four place low-wing twin engine aircraft with fixed conventional landing gear, twin tail booms with individual rudders, and a teardrop shaped fuselage. The wing uses trailing edge flaps and 25 gallon fuel tanks are mounted in each wing root. Retractable landing gear were also tested on the model. The prototype was painted a copper color with green leather seats. It was tested in 1935 at Denver Colorado. The aircraft was funded from stock issued in the Crusader Aircraft Corporation, a parent of the American Gyro Company. The company folded in 1938 under securities fraud investigations before the Crusader could go into production. 1 Link to comment Share on other sites More sharing options...
red750 Posted July 5 Author Share Posted July 5 The LaFlamme Helicopters is a kit built twin rotor helicopter designed for home assembly. Description FUSELAGE: Composite materials: Fiberglass and urethane foam; Monocoque: 24’x 2.5’x 6′ ENGINE: 230~350 h.p. (See Horse power rating) ROTORS: Rigid type, 3 blades each; 260″ in diameter SEATS: Tandem: Pilot and co-pilot CRUISING SPEED: 140 mph EMPTY WEIGHT: 1775 lbs. GROSS WEIGHT AT THE TAKE-OFF: see Horse power ratings – 2200 to 3500 lbs. PROPOSED KIT PRICE: 47,000 $ US The kit List of parts included in a kit: Fuselage, engine covers, rotor heads, blades, transfer case, seat frames, canopy contour. List of parts not included : Engine and accessories, instrumentation, drives shafts, main transmissions (differential) , controls, hardware. Estimation price of parts not included : 10,000 $ U.S. Workman hours : 800 hrs. For further details, click here. Link to comment Share on other sites More sharing options...
skippydiesel Posted July 5 Share Posted July 5 17 hours ago, red750 said: The American Gyro AG-4 Crusader is a small twin engine aircraft. The aircraft was designed as the Shelton Flying Wing in 1933 by Thomas Miles Shelton. Wow! Love the styling. Looks like it might be fast. Strange that they went to so much trouble to make it look streamlined and then had no propeller spinners. Any idea of the performance and engine hp Link to comment Share on other sites More sharing options...
onetrack Posted July 5 Share Posted July 5 Interesting concept, the LaFlamme twin-rotor homebuilt helicopter - but quoting US$47,000 and 800 hrs for a complete build has to be the best aviation under-estimation I have seen in some time! Add in the fact that the builder could never find any takers to support his ideas - and talking about Ford V6 power, whilst showing a Buick V6 engine! - kind of makes you wonder about the accuracy of all that he describes! Les Helicopteres Laflamme LAF-01 WWW.REDBACKAVIATION.COM An interesting tandem helicopter that could have made its mark in the kit helicopter world, but struggled and re-tooled for commercial drone usage. Link to comment Share on other sites More sharing options...
Marty_d Posted July 5 Share Posted July 5 It also said "Rotors: 3 blades each" while in the top pics at least, my Mk.1 eyeball clearly tells me there's 2 blades each. Bottom one shows 3 blades and a different rego / colour scheme - so they made at least 2. 1 Link to comment Share on other sites More sharing options...
red750 Posted July 13 Author Share Posted July 13 The Ayres LM200 Loadmaster was a small cargo aircraft developed in the 1990s by Ayres Corporation largely for the needs of small-package carriers. In 1996, urged on by Federal Express, development was begun, designed to carry four demi containers. The aircraft was to be powered by a LHTEC CTP800-4T turboprop, which was composed of two CTP800s driving a single five-bladed Hamilton-Standard propeller through a combining gearbox. To support this development effort, Ayres acquired the LET aircraft manufacturing company in the Czech Republic in September 1998. In 2001, the company was forced into bankruptcy when creditors foreclosed on it, and the Loadmaster program was terminated. 1 Link to comment Share on other sites More sharing options...
Marty_d Posted July 14 Share Posted July 14 Looks like a Lego plane. 1 Link to comment Share on other sites More sharing options...
facthunter Posted July 14 Share Posted July 14 It's designed specifically to carry a certain size cargo container. Nev Link to comment Share on other sites More sharing options...
red750 Posted July 17 Author Share Posted July 17 The Boeing Model 360 is an American experimental medium-lift tandem rotor cargo helicopter developed privately by Boeing to demonstrate advanced helicopter technology. The aircraft was intended as a technology demonstrator, with no plans to put the type into production, and many of its design features were carried onto other programs including the RAH-66 Comanche and V-22 Osprey. The sole prototype has been preserved and is a static exhibit at the American Helicopter Museum in West Chester, Pennsylvania. Link to comment Share on other sites More sharing options...
BrendAn Posted July 18 Share Posted July 18 (edited) Edited July 18 by BrendAn 1 Link to comment Share on other sites More sharing options...
BrendAn Posted July 18 Share Posted July 18 stealth bomber Link to comment Share on other sites More sharing options...
red750 Posted July 19 Author Share Posted July 19 The Campbell Model F, a pusher configuration, two seat sport aircraft built in the 1930s, was unconventional in its day with its empennage on twin, slim booms, a cockpit under stepless, rounded, multi-panel glazing and a tricycle undercarriage. The Model F first flew in 1935, though the exact date is unknown. By 1937, if not earlier, it was making demonstration flights including one from Bolling Air Force Base. It was damaged in another demonstration and was not repaired. For details of development and design, click here. Link to comment Share on other sites More sharing options...
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