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HelicopterHIROBOOther › Sceadu Explosion!
04-29-2004 12:35 AM  13 years agoPost 21
mustang1349

rrApprentice

nash Texas

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ive seen alot of this boom strike stuff. and it all ways seems tobe while the heli is inverted. i fly nothing but hirobo exept the rappy 50. i have never a problem. my gess is the pitchs being used is extrem. i run -9 0 +9 for 3d and never a problem on any chopper. even with the woods on a raptor with no upgrades. i was once told its 5% heli and 95% pilot !!
also i have found the sceadu works best with a 1800 head speed. i barly run 1850 on my freya and never bogs out .

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04-29-2004 02:15 AM  13 years agoPost 22
HeliNerd

rrApprentice

Navarre, FL

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Wow.. It seems as if the "purfect" blade would be a SAB. I liked the MAH's and how they auto'ed. I did notice that they were snappy though

Might just be the 600's. The fury guys are happy with the larger chord blades.

Oh well, When i get back into heli's maybe the blades will be better suited to these heli's.

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04-29-2004 02:23 AM  13 years agoPost 23
Greg McFadden

rrKey Veteran

Richland, WA

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worst case with flutter, Is go with V-blades, back with the original sceadus, that was almost a surefire solution you'll come back, these things are addictive

The silence often, of pure innocence persuades, when speaking fails

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04-29-2004 02:45 AM  13 years agoPost 24
fitenfyr

rrProfessor

Port Orchard, Washington

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MAH blades.

MAH blades fly just fine on my Sceadu and have since day one. Now I have not tried a set on my EVO head as of yet, but I really don't think the blades are the cause of any of these incidents.
For one....Jeff Green has flown the snot out of MAH blades on both the EVO and non-EVO heads. If there was an inherent problem with those blades he would have said something about them by now.
I know for a fact he likes the feel of those blades on the Sceadu.
Now I can tell you one thing for sure. They will blade stall in agressive manuvers with +11 on the Sceadu. That is too much pitch for those blades. They will not stall enough to boom strike IMO, but they will slow down and bog the engine a tad. Uncorrected I am sure they could slow down that much, but I think you would almost have to do that intentionally.
I have found that MAH 600's run best on the Sceadu at +10/-10.

I agree with Greg.
The root cause here is the MP1 and GV-1 combo. They don't like each other. Especially on the OS 50. That pipe was never designed for that engine and is know to cause conflicts with the GV-1 on the 61 motors is was made for.
My assumption here is the engine bogged due to the combo and caused the headspeed to decay.
I bet if you could have checked it on the ground you would have found the engine running backwards. (had this happen a few times on my YS61 and MP1 combo I had for a bit).

Sorry to hear about the crash. Sounds like it is pretty botched up.
Put it in a box and on the shelf till the rest of your life gets sorted then start again.

Jason Stiffey
Fly Fast....Live Slow...

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04-29-2004 03:44 AM  13 years agoPost 25
traderdave2

rrVeteran

Covington, GA

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The reason for your crash is in the post. You mentioned that the headspeed decayed right before it happened. Too much pitch and not enough headspeed will do it everytime. I don't know if the engine bogged or lost power for some other reason, but the results are still the same.

I am sorry to hear about your loss. Its very tough sometimes.

Harlan

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04-29-2004 05:18 AM  13 years agoPost 26
HeliNerd

rrApprentice

Navarre, FL

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welp, maybe so. But since I saw it go out of track pretty good, and since I have had that problem in the past, especially when inverted, I am aiming at the head as the main issue. The links were all still hooked up when I got to it, so none popped off. It's a shame though, Total loss except the engine.

http://personal.bellsouth.net/a/k/akthane/hirobo.jpg

http://personal.bellsouth.net/a/k/akthane/hirobo2.jpg

there's some pics for you sick people out there that look at carnage

I took alot of stuff off before this, so please don't pick it apart and say "that's what's wrong"

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04-29-2004 06:15 AM  13 years agoPost 27
jento261

rrNovice

The Great South

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not what it seems

If the pic in your first post is of the blades you where flying they look like
quick blades not MAH also the fuel in the background is CP 20%
also looking at the other pics why did you put the extra arm on your collective but not push pull, this just makes for more slop than installing the servo te other way? looking at other things like the remote glow plug adapter leads on to wounder about the workmanship in this acft.
THESE THINKS CAN KILL AND NEED TO BE MATAINED IN THE SAME WAY ANY ACFT THAT CAN CARRY PEOPLE ARE MAINTAINED-----with SKILL

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04-29-2004 07:04 AM  13 years agoPost 28
ZZ3Astro

rrVeteran

Panama City, Fl

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also looking at the other pics why did you put the extra arm on your collective but not push pull, this just makes for more slop than installing the servo te other way? looking at other things like the remote glow plug adapter leads on to wounder about the workmanship in this acft.
Look at his main needle on the carb.. I guess that was poor workmanship... he shouldn't have been flying that heli around with a cracked needle assy!!! Not..

It's called carnage from a heli falling 100+ feet to concrete. Sheeez, I bet some Hirobo people would blame the Space Shuttle disasters on the Pilots if they had the chance!

steve

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04-29-2004 07:32 AM  13 years agoPost 29
Parsifal

rrVeteran

Singapore

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Hey, Sorry to hear about your crash... thanks again for trying to help me out with the flutter issue. Bet you'll be back mate...

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04-29-2004 09:11 AM  13 years agoPost 30
mrNoodles

rrProfessor

Borlänge, Sweden

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I´ve just ordered MAH´s, Kinger uses (abuses) them and loves them, RAY-DOG does the same...

I´ll doubt it´s the blades, Im really looking forward to try mine

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.

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04-29-2004 11:52 AM  13 years agoPost 31
blakka_1

rrElite Veteran

London/Enfield

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noodles you should have no problems then

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04-29-2004 01:06 PM  13 years agoPost 32
Kinger

rrElite Veteran

Granville, OH

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MrNoodles - I wouldn't say I "abuse" them My level of flying isn't that great yet. LOL!! They hold up to flips/rolls/deathspirals/inverted autos and inverted circuits just fine. I'm still working at the rest of the cool stuff

Team Synergy

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04-29-2004 01:40 PM  13 years agoPost 33
HeliNerd

rrApprentice

Navarre, FL

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they look like quick blades not MAH
Calling me a Liar?? Want some references to talk to?? Zoom in on this picture. You will notice MAH on the black strip

The fuel is CP 15%... What's wrong with that Jento261?? not good enough for you??

And there's only one arm because IT FELL TO IT'S DEATH!! on the right side

Educate yourself before you speak!!!!!!!!!!!!!!!!!!!!

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04-29-2004 04:27 PM  13 years agoPost 34
blakka_1

rrElite Veteran

London/Enfield

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04-29-2004 06:03 PM  13 years agoPost 35
slant911

rrVeteran

Las Vegas, NV. Hirobo, Magnum Fuels, MAH

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MAH

I too have flown nothing but MAH blades on my EVO with zero problems. Something else was "up" with your machine.


John B. McNamara

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04-29-2004 06:09 PM  13 years agoPost 36
mrNoodles

rrProfessor

Borlänge, Sweden

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Seems to be quite many MAH/EVO users that likes/loves this combo.

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.

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04-30-2004 12:52 AM  13 years agoPost 37
vetrider

rrElite Veteran

Daleville, AL (Ft.Rucker)

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hhmmmmm

I've seen this heli and I believe these are the blades we got at Birmingham FF, right Ryan?
These are the ones Dimitry had and thay are all 9mm root size as will all future MAH 600's be according to Dimitry. This may be part of the problem as all the older Black/White (GREAT FLYING) MAH600's are 12mm root. Getting the right size and amount of washers to make the blade grip correctly might be a key in using these blades. I still have my set parked! So far the cheap old TT blades are fine but I loved my olded 12mm root MAH's when I had them.

Also, Ryan, I believe if you saw the blade go out of track during the manuver you saw it happen after the blade retreated from the rotor decay. It only takes a little and the boom is bye bye!

Just my 2 senses

Nolan

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04-30-2004 01:12 AM  13 years agoPost 38
sluggo

rrElite Veteran

Kitchener Ont

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HeliNerd where did you get them blades? They are MAH that is for sure. I have flown MAH for 4 years now and have had a few bad sets. It could have been the blades that caused it, not all sets are going to be perfect.

To bad that you lost your EVO they seem to be great heli's. I know the MAH blades lead a bit and on most heli's there is no prob but some heli's seem to not like this to much. If you get a set that leads a little more then normal it could cause the heli to flutter. Also bad thrust bearings, bad dampners, even bad grip bearings can cause a flutter.

Chris

Teambob00

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04-30-2004 01:26 AM  13 years agoPost 39
Havoc

rrElite Veteran

Ky.

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I like the old all black MAH or the white tip MAH. Don't care for the all white look. They look cheap to me. I have a older set that is all black and requires shims and two sets that are white tipped that don't need shims. I didn't order any specific style I just said send me MAH 600s and that is what I got. I actually think the shims are not so bad. I keep my blades a little tight so they feel a little notchy when you move them and I also fold them back and put them on the blade holders when done. The one that does not require shims now has a small little superficial chip near the bolt that i assume is from the blade rubbing the grip. The ones with the shims are still flawless. Since then I have been loosening the white tip blades before I fold them back.

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04-30-2004 03:25 AM  13 years agoPost 40
HeliNerd

rrApprentice

Navarre, FL

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Vetrider, they are 12mm/49/603's just so you know. Its all good. The sceadu is gone, and I knew that when I posted it would be a flame war. There's alot of attitudes around this forum that are unacceptable, and makes it no fun at all. Not that I am falling into this "feel sorry for me" routine- I had a bad crash and i'm over it. It's time to take a break. People like jento ruin the whole lot for everybody.

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HelicopterHIROBOOther › Sceadu Explosion!
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