Red Bull B0-105
For the negative G part, if you have speed just push the stick forward.
A combination of lowering the lever and cyclic forward 'bunt' is the 'safer' way - many military crewmen have been weightless briefly in the back of helicopters like that.
Originally Posted by [email protected]
The only problem is that doing that from the cruise, you very quickly end up pointing at the ground with rapidly increasing speed.
A combination of lowering the lever and cyclic forward 'bunt' is the 'safer' way - many military crewmen have been weightless briefly in the back of helicopters like that.
A combination of lowering the lever and cyclic forward 'bunt' is the 'safer' way - many military crewmen have been weightless briefly in the back of helicopters like that.
. After a bunch of years on bigger ‘busses’, I now sit in the H145D3 after retirement from the Air force three days ago :-) Somehow the burglar always return to the crime scene :-)
Did my 105 course at the factory in 1978. The groundschool was delivered by a guy called von Englehardt - mate of aforementioned Herr Hoffman, and one of the original project pilots.
He told many stories about the flight test programme. A couple of exchanges will stay with me for ever -
“Ve climbed to 5000’ und ve svitched off ze tail rotor”.
”Why?”
”To see vot vould happen, of course!”
Apparently they built a clutch into the driveshaft for precisely that reason!
And……
”Is it possible to control the 105 without any hydraulics?”
”Ja. Von pilot mit both hands on ze cyclic, und von pilot mit both hands on ze collective.”
Respect. They don’t make ‘em like that any more!
He told many stories about the flight test programme. A couple of exchanges will stay with me for ever -
“Ve climbed to 5000’ und ve svitched off ze tail rotor”.
”Why?”
”To see vot vould happen, of course!”
Apparently they built a clutch into the driveshaft for precisely that reason!
And……
”Is it possible to control the 105 without any hydraulics?”
”Ja. Von pilot mit both hands on ze cyclic, und von pilot mit both hands on ze collective.”
Respect. They don’t make ‘em like that any more!
Last edited by QTG; 4th Jul 2022 at 06:22.
No, SAS, that was not me in that movie. Crew was Kurt Cannon Project Pilot on the 67 and Byron Graham, Ch. Engr. Pilot ( who had done the CH-53 loops/rolls movie with then Major Bob Guay, USMC ).
I was inducted into the 67 program just before the demo trip around the US in 1971 as the Project Pilot was unable to travel. Stayed with it after that and did the Europe/Iran demo trip in 1972, both with Byron. Byron was a gem. No matter who was on the schedule to receive a ride, he would fly a tank of fuel with whoever was scheduled, then I’d get the next tankful of front seaters. Got to fly some very interesting people: perhaps General Adolf Galland being the most noteworthy. He was amazing: showed him how to do a split s and a roll and then he did both and the aircraft didn’t know the difference. The picture of the S-67 flying on a sunny day with the Cologne Cathedral below in the background was with General Galland flying it from the front seat. Everyone got the same routine incl those maneuvers and a 3-4 second zero G parabolic push ( well, you know who the competition was at the time ).
I was inducted into the 67 program just before the demo trip around the US in 1971 as the Project Pilot was unable to travel. Stayed with it after that and did the Europe/Iran demo trip in 1972, both with Byron. Byron was a gem. No matter who was on the schedule to receive a ride, he would fly a tank of fuel with whoever was scheduled, then I’d get the next tankful of front seaters. Got to fly some very interesting people: perhaps General Adolf Galland being the most noteworthy. He was amazing: showed him how to do a split s and a roll and then he did both and the aircraft didn’t know the difference. The picture of the S-67 flying on a sunny day with the Cologne Cathedral below in the background was with General Galland flying it from the front seat. Everyone got the same routine incl those maneuvers and a 3-4 second zero G parabolic push ( well, you know who the competition was at the time ).
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Originally Posted by SASless
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Has anyone got a link to the video of the BO105 (or BK117) titanium rotor hub being manufactured in a hammer forge? I have seen it in the past but can't track it down.
Last edited by Bokyag; 20th Jan 2023 at 02:55.
Originally Posted by greenthumb
I would like to know how it was possible to mix military parts with the approved civil ship and parts??? The mil parts not having a BO105 civ partnumber and no civ ticket. Over the last 20 years it was impossible to use one single screw from the mil ships on civ registered. Germany phased out so many BOs from mil service. To get very cheap. But EC prohibited strictly the use of ex-mil ships and any parts. Very strictly!
And if it was no part in the certification process aerobatics couldn`t be approved on my sight for a civil registered helicopter according to the present rules. But with the power and money of REDBULL...
And if it was no part in the certification process aerobatics couldn`t be approved on my sight for a civil registered helicopter according to the present rules. But with the power and money of REDBULL...
As I remember, he said that the helicopter (built in 1974(!) is basically serial helicopter with no significant modifications, apart from all non-essetial gear removed. Only maintenance is, of course, much more intensive with many inspections, etc. It is a simple fact, that BO-105 was the first serial helicopter with hingeless rotor, and Mr. Bolkow deliberatelly beefed up the titanium hub, as no one exactly knew, how this will work. The result was, that there is a big fudge factor in rotor design, that can withstand a lot of loads, plus the design, where excessive flapping, etc. is not such a problem.
I think that BK-117 has the same rotor hub, even it is much heavier.
Originally Posted by hoistop
Mr. Bolkow deliberatelly beefed up the titanium hub, as no one exactly knew, how this will work. The result was, that there is a big fudge factor in rotor design, that can withstand a lot of loads, plus the design, where excessive flapping, etc. is not such a problem.
I think that BK-117 has the same rotor hub, even it is much heavier.
I think that BK-117 has the same rotor hub, even it is much heavier.
Still, something designed for MTOW 2.5to still working on 3.7to is quite remarkable!
For the 3.8 to you now need the D3 with five blades ;-)
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