Yacht Helicopters

More threads for rotorheads...

General Heli Discussion…
http://www.yachtforums.com/forums/g...n/3853-helicopters.html?highlight=helicopters

Heli’s on smaller yachts…
http://www.yachtforums.com/forums/showthread.php?t=3447

Heli approach and storage on Ilona …
http://www.yachtforums.com/forums/showthread.php?t=3558

Heli approach & landing on Evvivia…
http://www.yachtforums.com/forums/showthread.php?t=3339

Sailboats & Heli’s? Yes! Tiara…
http://www.yachtforums.com/forums/g...n/2254-boom-strike.html?highlight=helicopters

I said bypass air from the turbine was exhausted at the rectangular port, not implying the exhaust was blown down the tail boom,it much to hot and the velocity is much to high.

I did not extrapolate where the bypass air came from,other than the turbine which is true.

While the "coanda effect" adds yaw stability,it's Built into the aircraft for longitudinal stability in flight and the pilot has no control,or lets say very little over this effect. the more air moving down over the tail boom the greater the effect.So the more power applied to the main rotor, the greater the effect. Most pilot controlled yaw is accomplished by a drum that rotates in the tail boom limiting or increasing the the bypass air.

Carl explained where it comes from so no need to repeat.

I think since I said bypass air was exhausted, Carl took I meant turbine exhaust, which passes Thur the main compressors and hot section.

I'm sure Carl has more experience than I, but technically what I said was correct.
If not ,Carls welcome to make additional corrections.

New Aircraft - NoMar NoTar

Nomar Notar (No Main Rotor - No Tail Rotor!)
Also called an aeroplane.

Anyone know of SeaWinds amphibious aircraft being used as shuttle craft, instead of a Heli?
I Know of 1, but cannot fully recall the name of Yacht "Big ****".


Talon

Nadine had a Seawind with a turbine, before she sank. The Seawind was not on board when she sank but the crew had to ditch their Jet Ranger.

Hi,

Nadine may have very briefly been known as Big Eagle in late 1991 the late Mr Bernie Little had it and it underwent a big mechanical refit replacing the Detroits with Cats amongst other things in the old Miami River Drydocks.

Cheers Guys,

Big & Little Eagle / Nadine, they have been in many films WITH a Seawind onboard.
Wait for the next Mega Yacht to have a V22 Osprey (Twin Tilt Rotor!) land on deck!

Jay - Talon.

Actually I really doubt that we will see a V22 Osprey on a yacht anytime soon. First of all, the fundamental premise of the aircraft had been questioned (has to do with VRS, basically it might stall in heli mode).

Thy tilt-rotor system is complicated to fly and relies heavily on computers. Being in the computer industry myself I know how much they can be trusted. In fact computer error contributed to at least one fatal accident with the MV-22 during a test fly.

Even besides the issue with VRS, and the potential buggy software. The mechanical hardware also has really poor reliability with the US military.

Remember that people who can afford a yacht large enough to land a V22 will be rich, and as such he in most cases values his life highly. I really doubt that they will trust their life on a aircraft that has a really fishy track record.

That's a shame really, because it would've been the perfect heli if I own a 340'+ yacht. The heli can actually be stored quite easily. The rotors folds and the wings actually rotates 90 degree. So, the width with wings folded would be similar to a conventional heli with rotors folded.

It's such an amazing concept, and problem with VRS can be dealt with via proper training and understanding of the limitations of the aircraft. However, I would rather see a new design start from a clean sheet. The V22 design has way too much history and baggage. Remember that they (military, Boeing/Bell) need funding to keep the project alive and lots $hit and drama happened as the result.

Oh and of course I know that you are kidding about the V22 in your original post. I just couldn't resist...

In any case it wouldn't likely be the V-22 anyways. The private sector will one day be getting the BA-609.

V22 / BA609 military and civil, but as you guys acknowledge, unlikely to see on deck!!

Would make the aft section sink somewhat if it did!!

More like one of those SkyCar concept things instead!

According to the BA brochure the max take-off weight is just under 17,000 pounds.

We have just finished designs to put a 55 foot LOA, 70,000 pound sport fish on the back of the latest Yacht Escort Ship, so a 17,000# bird is no problem for us.

Talk about arriving in style.....

As far as the weight of the helicopter is concerned, I think there are a few factors to consider with respects to weight. If the helicopter is going to be stored on a shadow then there shouldn’t be any problems. If the helicopter is going to be stored on the yacht itself, then it is more complicated as it most likely will negatively affect the CG if it is stored on the upper decks.

Personally I really like the heli hanger of Ilona. The only down side to it is that it is a bit too low and the heli might get sprayed with salt. My personal solution would be to have a dedicated owner’s deck above the main deck. Then have the pilot house and Ilona type heli hanger above the owner’s deck. Two tender/rescue boats can be placed to the sides of the heli hanger. This way you can have a sunbathing and social area above the hanger right next to the Jacuzzi & bar above the pilot house on the sun deck.

Of course there are many potential problems to my solution. First of all the boat will probably need to be 230’ up. Stability of the boat might suffer as more weight is put on the top. I always felt that my design will be way too top heavy, but then again Benetti Reverie seems to be doing fine with her 7 decks.

lurker, you mentioned the heli hanger system on Ilona. I heard that in total there are in excess of 70 hydraulic rams in order for this elaborate "deck contortion" to perform its tricks! It just takes one fault to bring the whole system to a halt. If I were planning a yacht, Id think twice before implementing something like that!!
Looks cool on a brochure, but.......!