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Search: Posts Made By: MLH
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Forum: Rotorheads
1st Oct 2019, 18:13
Replies: 32
Views: 8,060
Posted By MLH

A work load like that in a Robbie doesn't leave...

A work load like that in a Robbie doesn't leave much time to check for blade cracks or de-bonding.
Forum: Rotorheads
1st Oct 2019, 18:00
Replies: 32
Views: 8,060
Posted By MLH

It is my observation that the fair rides...

It is my observation that the fair rides assembled by tweakers are more dangerous than the helicopter rides.
Forum: Rotorheads
8th Aug 2019, 05:36
Replies: 221
Views: 72,493
Posted By MLH

This problem goes back many years. R44 SL-24...

This problem goes back many years.

R44 SL-24 21 Sep 2001
superseded by SB-72A https://robinsonheli.com/wp-content/uploads/2015/12/r44_sb72.pdf
Forum: Rotorheads
5th Aug 2019, 14:45
Replies: 221
Views: 72,493
Posted By MLH

You're making an assumption that the "new" blades...

You're making an assumption that the "new" blades are better in design than the old blades and that Robinson will not pull the rug out from under you with a future AD.
Forum: Rotorheads
2nd Aug 2019, 16:21
Replies: 221
Views: 72,493
Posted By MLH

I have owned two 44's and managed to avoid...

I have owned two 44's and managed to avoid replacing blades due to AD's. I will not own another Robinson product.
Forum: Rotorheads
24th Jun 2019, 23:02
Replies: 17
Views: 2,742
Posted By MLH

The question is, who was there first, the heliops...

The question is, who was there first, the heliops or the complainers? I became a partner in a flight school-tour business next to a drive-in-theater, the land was eventually sold for residential...
Forum: Rotorheads
23rd Jun 2019, 14:03
Replies: 25
Views: 8,910
Posted By MLH

A wild guess says that a catastrophic TR failure...

A wild guess says that a catastrophic TR failure occurred and the massive imbalance shook the gearbox and tail feathers from the boom.
Forum: Rotorheads
22nd Jun 2019, 04:23
Replies: 25
Views: 8,910
Posted By MLH

Too far aft and too clean for a tail boom strike.

Too far aft and too clean for a tail boom strike.
Forum: Rotorheads
18th Apr 2019, 22:13
Replies: 33
Views: 8,706
Posted By MLH

Forget the parachute, I want the full sized RC...

Forget the parachute, I want the full sized RC model.
Forum: Rotorheads
15th Nov 2017, 19:38
Replies: 6
Views: 1,818
Posted By MLH

MRB twist

All of the main rotor blades I am familiar with are designed with a linear negative twist from root to end in order to equalize span wise lift.


What would be the effect of flying a zero twist...
Forum: Rotorheads
3rd Oct 2016, 17:47
Replies: 18
Views: 3,174
Posted By MLH

Congratulations to the engineers at Tier 1 -...

Congratulations to the engineers at Tier 1 - maybe these clever guys can design a set of Robbie main rotor blades that can make it to TBO.
Forum: Rotorheads
8th Jun 2015, 15:21
Replies: 3
Views: 2,042
Posted By MLH

I've purchased two new R44's over the years, list...

I've purchased two new R44's over the years, list minus 6% was my experience. All of the main rotor blade issues and AD's became a serious hindrance in my continuing to do business with them.
Forum: Rotorheads
12th Jan 2014, 15:32
Replies: 39
Views: 6,389
Posted By MLH

Interesting discussion. As PIC, most of...

Interesting discussion.

As PIC, most of my time airborne has been 1000 AGL or below, I don't have a FW rating. On a ferry flight from the Robinson factory I spent a short time above 4,000 AGL...
Forum: Rotorheads
29th Dec 2013, 02:50
Replies: 20
Views: 7,111
Posted By MLH

The Ray Prouty books are my favorites, they never...

The Ray Prouty books are my favorites, they never get old. It will take more than one read for things to sink in.
23rd Oct 2013, 06:51
Replies: 17
Views: 3,042
Posted By MLH

I'm good friends with the owner of N30UP & N40UP,...

I'm good friends with the owner of N30UP & N40UP, they are currently unairworthy and have not been flown in many years.
Forum: Rotorheads
25th Mar 2013, 03:08
Replies: 22
Views: 6,634
Posted By MLH

chopjock, Can't move the bolt hole. C of G...

chopjock,

Can't move the bolt hole. C of G needs to move forward relative to the aero foil section. As the picture shows, there is plenty of room in the D-spar to drill a hole and place weight.
...
Forum: Rotorheads
24th Mar 2013, 01:08
Replies: 22
Views: 6,634
Posted By MLH

Rigga, I ran a calculation, the paint...

Rigga,

I ran a calculation, the paint removal is not enough, moves it .5% forward. I'll need another 2% which will have to be done with weights. I've heard that Brantly blades are weighted at 70%...
Forum: Rotorheads
24th Mar 2013, 00:47
Replies: 22
Views: 6,634
Posted By MLH

wrench1, Interesting story about the BO-105...

wrench1,

Interesting story about the BO-105 and the rope. The D-spar is solid aluminum. I've been thinking of a way to jig the blade so a hole can be bored from tip toward the root so a tungsten...
Forum: Rotorheads
23rd Mar 2013, 17:02
Replies: 22
Views: 6,634
Posted By MLH

Rigga, This is on an experimental where the...

Rigga,

This is on an experimental where the CWCG of the blade is currently at 27.5%. I'm looking for a way to get it under 25% without opening up the blades.

Mike
Forum: Rotorheads
22nd Mar 2013, 22:23
Replies: 22
Views: 6,634
Posted By MLH

Otterotor, That agrees with a paper I read...

Otterotor,

That agrees with a paper I read on the BO-105 where the CWCG is 24.5%.

Do the nose weights have to be distributed span wise or, can they be located forward of the 1/4 chord at the...
Forum: Rotorheads
22nd Mar 2013, 18:56
Replies: 22
Views: 6,634
Posted By MLH

Main Rotor Blade Chordwise CG?

I'm looking for information on chordwise CG of the NACA 23012 airfoil. The texts I've read state that blade stability is achieved when the balance is at 25% from the leading edge. Is there a range...
Forum: Rotorheads
2nd Mar 2013, 04:30
Replies: 24
Views: 8,148
Posted By MLH

Best location I ever mounted a video cam without...

Best location I ever mounted a video cam without vibration isolation was the tow ball under the belly on the R44: flying.m4v - YouTube...
Forum: Rotorheads
26th Oct 2011, 01:46
Replies: 23
Views: 6,274
Posted By MLH

Owned two R44's over the years, things just keep...

Owned two R44's over the years, things just keep getting worse. After the costly fuel tank SB and blade AD's won't own another.
Forum: Rotorheads
28th Mar 2011, 19:39
Replies: 55
Views: 28,644
Posted By MLH

I don't have the maintenance manual handy but, I...

I don't have the maintenance manual handy but, I believe an overspeed like that requires that the magnetos be inspected.
Forum: Rotorheads
8th Nov 2009, 21:42
Replies: 1,494
Views: 423,212
Posted By MLH

The range of RPM where rocking occurs seems to be...

The range of RPM where rocking occurs seems to be rather narrow, breif application of the rotor brake usually works to eliminate the condition.
Showing results 1 to 25 of 48
 


 
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