Hughes/Schweizer/Sikorsky 300 ish Forum?

[cburg]

Anybody know of a forum or owners group?

[apiaguy]

Nope. But I can probabally help you with any questions

[cburg]

Nope. But I can probabally help you with any questions

Thanks I'm buying one tomorrow...and have exactly 1-hour in one...so I'm sure I'll have plenty to ask & learn about them.

 

I heard that twisting the blades/friction dampers before start-up slightly reduces ground resonance probability at start-up?

[apiaguy]

If your buying one with the old rotary friction hydraulic dampers...yes, you move each blade to "center" the damper before you start up. The newer elastomeric dampers that can be put on any helicopter that uses current blades requires no adjusting.

Sweet! Good luck. Have tons of parts if you need anything... For all the models

[cburg]

If your buying one with the old rotary friction hydraulic dampers...yes, you move each blade to "center" the damper before you start up. The newer elastomeric dampers that can be put on any helicopter that uses current blades requires no adjusting.

Sweet! Good luck. Have tons of parts if you need anything... For all the models

Thanks, good to know.

 

I'm in Houston and heard there's a large fleet here in Texas (old Army base I guess). You in Texas?

[cburg]

I'm OK with the GR topic in general, at least from what I've studied, but wonder about hovering autos and it being a thing that could hit the left rear and get it started. Is this a flight phase that one needs to worry about GR?

 

The part I dread...believe it or not...is three blades...storage footprint. The Rotorway and the RV are quite happy side by side in the hanger...but with three blades??

 

Of course I'll get transition training, but am having fun chair flying it. I'm going to miss the Robbie governor, but I've got to grow-up someday ;-)

[Wally]

I'm OK with the GR topic in general, at least from what I've studied, but wonder about hovering autos and it being a thing that could hit the left rear and get it started. Is this a flight phase that one needs to worry about GR?

 

The part I dread...believe it or not...is three blades...storage footprint. The Rotorway and the RV are quite happy side by side in the hanger...but with three blades??

 

Of course I'll get transition training, but am having fun chair flying it. I'm going to miss the Robbie governor, but I've got to grow-up someday ;-)

 

Ground resonance is a serious problem with lots of ways to induce it, but hovering auto GR is, I think, rare. Ground resonance, also called dynamic divergent excitation by the French, which gives a better idea of the process, is a function of harmonics- the engine delivering power to a rotor that shaking the airframe at it's natural frequency or a harmonic... not being an engineer, I can't explain that any better without using hand gestures. If you don't have power driving the rotor, an "airframe shake" usually damps out pretty quickly. Continuing to drive the rotor at that frequency is where the process becomes a problem.

The landing gear struts (are they still oleo?) are key, one bottoming out in sync with the rotor is what normally starts GR. Keep the struts and MR dampers up to par, consider your landing surface carefully, GR/DDE is not a problem.

 

Yeah, 3-bladed helos can take up more room than a 2-bladed. It's an issue if you have verticals, walls, etc. where the blade will be/pass. You can overlap low obstructions and "interweave" the blades in the hangaring process if you're really careful, and mitigate some of the issues.

 

I really liked the 269/300 series control response and durability. The H269B was my favorite instructional seat.

[cburg]

 

Ground resonance is a serious problem with lots of ways to induce it, but hovering auto GR is, I think, rare. Ground resonance, also called dynamic divergent excitation by the French, which gives a better idea of the process, is a function of harmonics- the engine delivering power to a rotor that shaking the airframe at it's natural frequency or a harmonic... not being an engineer, I can't explain that any better without using hand gestures. If you don't have power driving the rotor, an "airframe shake" usually damps out pretty quickly. Continuing to drive the rotor at that frequency is where the process becomes a problem.

The landing gear struts (are they still oleo?) are key, one bottoming out in sync with the rotor is what normally starts GR. Keep the struts and MR dampers up to par, consider your landing surface carefully, GR/DDE is not a problem.

 

Yeah, 3-bladed helos can take up more room than a 2-bladed. It's an issue if you have verticals, walls, etc. where the blade will be/pass. You can overlap low obstructions and "interweave" the blades in the hangaring process if you're really careful, and mitigate some of the issues.

 

I really liked the 269/300 series control response and durability. The H269B was my favorite instructional seat.

Thanks, what are your thoughts about flying with a helmet. Most of my flying has been open-cockpit and I'm comfortable with helmets.

[apiaguy]

If you want to fly w a helmet... Go ahead

I only wear a helmet while spraying or vertical ref.

[cburg]

If you want to fly w a helmet... Go ahead

I only wear a helmet while spraying or vertical ref.

Thanks, the extra headroom was a plus in making the choice.

[cburg]

 

Ground resonance is a serious problem with lots of ways to induce it, but hovering auto GR is, I think, rare. Ground resonance, also called dynamic divergent excitation by the French, which gives a better idea of the process, is a function of harmonics- the engine delivering power to a rotor that shaking the airframe at it's natural frequency or a harmonic... not being an engineer, I can't explain that any better without using hand gestures. If you don't have power driving the rotor, an "airframe shake" usually damps out pretty quickly. Continuing to drive the rotor at that frequency is where the process becomes a problem.

The landing gear struts (are they still oleo?) are key, one bottoming out in sync with the rotor is what normally starts GR. Keep the struts and MR dampers up to par, consider your landing surface carefully, GR/DDE is not a problem.

 

Yeah, 3-bladed helos can take up more room than a 2-bladed. It's an issue if you have verticals, walls, etc. where the blade will be/pass. You can overlap low obstructions and "interweave" the blades in the hangaring process if you're really careful, and mitigate some of the issues.

 

I really liked the 269/300 series control response and durability. The H269B was my favorite instructional seat.

How do you like to set up your 180 autos in this bird?

[Goodfellow]

Hello Mr. A - I have a couple of 269C's and looking for some parts. If you happen to be looking thru your parts collection I'm in need of.

 

1. 269A5305-11

If this "inexpensive" unit is not to be found.

2. 269A5326-1 and

3. 269A5325-1

 

Thank you much. GF

[apiaguy]

700 feet makes it easy... Parallel to your spot, close in (like right off your skid close). Down right aft, stabile 52-60kts, turn turn turn

You can make the 180 from 400 once proficient or lower if aggressive

[Wally]

Thanks, what are your thoughts about flying with a helmet. Most of my flying has been open-cockpit and I'm comfortable with helmets.

 

I wear a carefully fitted and maintained helmet all the time. My employer requires it, sometimes I wish I had an option. It's a tradeoff, the increased weight and heat retention are fatigue issues on long, hot, humid days even with air conditioning or the doors off.

Nothing is black or white in this business and if you think it is, you're overlooking something important, somewhere. Pick the shade of gray as close to the end of the spectrum as you can bear.

Edited February 26, 2014 by Wally

[cburg]

I forgot to mention, I fly with a trike helmet. It allows for standard headsets, and offers superior peripheral viewing.

 

http://www.lynx-avionics.com/English_Site/E_Site_Index/e_frame_set.html

[Wally]

How do you like to set up your 180 autos in this bird?

 

It's been 30 years, but "apiaguy' sounds like what I remember.

[cburg]

 

It's been 30 years, but "apiaguy' sounds like what I remember.

The first few should be interesting...crank and bank!

[Wally]

I forgot to mention, I fly with a trike helmet. It allows for standard headsets, and offers superior peripheral viewing.

 

 

http://www.lynx-avionics.com/English_Site/E_Site_Index/e_frame_set.html

 

 

 

I wouldn't scrimp on the helmet. I could do without a lot of bodyparts, but what's between my ears isn't on that list.

I like the Gallet LH250 for comfort and protection. Some parts wear faster- earcups, edge-rolls, and all the retention strap bits wear out much more quickly than on a Gentex.

[Goodfellow]

I need a few parts Mr. A. Do you happen to have 5305-11? If not in your stockpile how about 5326-1 and the hub 5325-1?

 

If this happens to double post please excuse the mess.

 

Thank you- Goodfellow

[cburg]

I wasn't familiar with the Hughes 269/300 AGSI until now...

[aeroscout]

I wasn't familiar with the Hughes 269/300 AGSI until now...

You should try to airstart an F-14D, or glide an F-4.

[dankaten]

You don't have to worry about Ground resonance in hovering autos. Once the engine is taken away you cannot get in to ground resonance. If it is a 269 if it starts to feel like it is out of sync from a hover just give it a sharp jolt on the collect of about half an inch and it should line everything back up. Its a good machine. I learned to fly in one of those.

[cburg]

You don't have to worry about Ground resonance in hovering autos. Once the engine is taken away you cannot get in to ground resonance. If it is a 269 if it starts to feel like it is out of sync from a hover just give it a sharp jolt on the collect of about half an inch and it should line everything back up. Its a good machine. I learned to fly in one of those.

The one hour I have was at Hooks, probably the same 300 you were flying. Nice machine.

[Wally]

I wasn't familiar with the Hughes 269/300 AGSI until now...

 

Your car keys are acceptable substitute if you don't have other training aids at hand. Add a nice metallic noise at touchdown.

Edited February 28, 2014 by Wally

[cburg]

So it would do no good to jump out of it, because it would just hit you on the head;-)

 

Maybe one of these would buy you time:

 

http://www.flight555.net/design.htm