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INSIDE THIS ISSUE: SANParks South African Elephant & Rhino Preservation + VIDEO | German Army's SAR LUH145 Ops | How Drones & Helicopters Can Work Together Firefighting | One Engine or Two: A Legal Question | Executive Watch: Bart Reijnen, President of Airbus Helicopters North America | Meet a Rotor Pro: Joshua Montour | My 2 Cents Worth | Safety First | Uncrewed Update | Mil2Civ Transition | Maintenance Minute | Rotorcraft Checkride


Recent VR Forum Posts
Thursday, February 22, 2024

ENJOY THE NEW AGE OF VERTICAL LIFT WITH ROTOR PRO'S JAN-FEB 2024 HELI-EXPO ISSUE! Read here: https://bit.ly/RotorProMag_JanFeb2024 INSIDE THIS ISSUE: SANParks South African Elephant & Rhino Preservation + VIDEO | German Army's SAR LUH145 Ops | How Drones & Helicopters Can Work Together Firefighting | One Engine or Two: A Legal Question | Executive Watch: Bart Reijnen, President of Airbus Helicopters North America | Meet a Rotor Pro: Joshua Montour | My 2 Cents Worth | Safety First | Uncrewed Update | Mil2Civ Transition | Maintenance Minute | Rotorcraft Checkride

Monday, February 19, 2024

Hey Bruce, if you’re still looking, contact HeliPlane Aviation in Anderson SC and ask for Scott. His number is 864-314-0416

Monday, February 19, 2024

Man thank you so much for taking the time to explain that it helped tons, still digesting and working through some of the technical points of what you're saying. Haha took me too long and a re-read to realize "TV" meant Thrust Vector in that illustration, by the way a beautiful drawing of an R22 lol. So with a hypothetical EXTREME negative dihedral, side slipping would almost immediately tighten that right roll, and bring the rotor mast intoooo mast bumping fast af? Just asking to check my understanding on that part. Anyway thank you again!!

Friday, February 16, 2024

Blade flapping results from conditions referenced to the flight path (relative wind) rather than the orientation of the fuselage. In forward flight, with no sideslip and the rotor trimmed perpendicular to the shaft, the helicopter is in equilibrium. Let's simulate a theoretical side slip condition. Suppose the flight direction is suddenly changed so that the helicopter is flying directly to the right without changing fuselage heading or control settings. In that case, the blade over the tail becomes the advancing blade and the one over the nose the retreating blade. Since the cyclic pitch no longer corresponds to trim conditions, the rotor will flap down on the left side and up on the right side. The asymmetrical velocity distribution over the rotor tilts the thrust vector to the left, creating a moment arm about the CG and producing a rolling moment to the left, countering (dampening) the right roll. Notwithstanding this theoretical side slip condition, sideslip angles are far less than 90°. Still, the trend is the same: helicopters roll away from the approaching wind (sometimes called blowback or flap-back). The same characteristic found on airplanes with dihedral (both wings slanted up) is referred to as positive-dihedral on rotors, even though the source is different. Positive dihedral is only possible for the R22 and other teetering rotor system helicopters if the rotor is positively G-loaded, allowing it to produce thrust. Without a viable thrust vector, rotor flapping alone cannot change the fuselage attitude. Positive dihedral is a desirable characteristic that helps the pilot. With a negative dihedral, a sideslip would tend to roll the aircraft into an ever-tightening right roll. Too much positive dihedral, on the other hand, can also be undesirable, often causing an over and undershooting around an equilibrium position, increasing the pilot's workload. Don't forget all helicopters have a small degree of inherent sideslip, and any excessive or unnecessary sideslip increases rotor flapping. Moreover, low-G and negative-G flight environments eliminate rotor dampening on teetering rotor systems. A good roll characteristic is one in which the helicopter can roll into a coordinated turn with equally balanced lateral acceleration. Like in level flight, the pilot will feel no left or right acceleration (slip or skid), remaining straight in the seat. The radius of the turn held constant throughout. Dihedral Effect: the tendency of the helicopter to roll away from the approaching air during sideslip. Dihedral Effect Slip vs Skid

Wednesday, February 14, 2024

You might be wanting to slip to the right during descent, so your nose is pointed left of the flight path. You will have some right cyclic input to start the flight path in that direction, but then take some of it out to maintain the slip. The drag on the fuselage will want to swing the body further out to the left, as it hangs under the mast. This brings the mast to lean further to the right, and reduce the clearance between the rotor head and the mast. You don't want to roll quite as much as this drag is making you do, so you counter with a bit more left cyclic. This further reduces the clearance, and it can be possible to then get a mast bump if anything upsets the balance. You will also be doing a tap-dance on the pedals to keep the nose pointing where you want it, and the secondary effect of pedal is roll - which might be the tipping point for a mast bump.

Wednesday, February 7, 2024

Hi guys.. I've been reading your posts about Island Helicopters. Back in the 1980's I used to spend a lot of time at the 34th street Heliport, watching and videotaping the helicopters coming and going, sometimes all day! Island and New York Helicopter flights never seemed to stop. I've never forgotten those days, and as a tribute, I created a few Island Helicopters liveries for the 2020 Microsoft Flight Simulator, with some with actual videos from the 80's, on my flightsim.to page Col.F.E.Cochrane Take a look. I hope you enjoy them, ..and thanks for the great lifelong memories!

Wednesday, February 7, 2024

Found this excerpt online from Frank Robinson on R22s and don't quite understand what this man means when talking about adverse roll characteristic. What is a good roll characteristic when it comes to helicopters and why is rolling into the turn better during a sideslip? Negative Dihedral??? SIDESLIP WITH THE R22 Concerning the caution against excessive sideslips in the R22 flight manual, this was in part due to a misunderstanding by the FAA. In the Army training film on mast bumping, it showed excessive side slipping as one cause of mast bumping. This was true for the Army Bell Cobras and Hueys, because both aircraft have high centers-of-gravity and relatively low side silhouettes due to their high-mounted powerplants and low-mounted tailcones. During a severe sideslip, the resultant fuselage drag could be below the center-of-gravity and cause the helicopter to roll out of a turn, instead of into the turn, i.e. a negative dihedral or adverse roll characteristic. Airplanes prevent this by having wings with positive dihedral. I am just a wee student pilot, any references/knowledge and fun facts anyone has on Sideslips would be greatly appreciated, Thank you

Sunday, February 4, 2024

Does anyone know of a Bell 47 experienced mechanic is Washington state or Oregon that could do a pre-purchase inspection?

Tuesday, January 30, 2024

I just leased a hanger at Ramona Airport and also looking to lease an R 44 or R 22 and looking for a partner I don’t know Ramona is too far for you

Tuesday, January 16, 2024

Hi All, I just have a few questions in regards to an FAA/EASA IR conversion. 1. If I complete my IR either in the US or anywhere in Europe outside of the UK, what would be the average cost? 2. What would be the average conversion cost to UK/CAA. Was wondering if it would it work out cheaper this way as I'm aware that an IR in the UK costs around £75,000. Thank you so much!