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MSH Protos, Mini Protos
› Now we got it straitened out!
12-28-2008 04:42 PM  8 years agoPost 21
McRex

rrVeteran

AZ-USA

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No, the pitch boss does not rotate freely, and the pitch lever is smooth. I tried a test flight this morning, and it was still bouncing, plus it chewed up the pitch boss/slider assembly. This is my second pitch slider assembly, and both have felt the same. The kit I have is one of the first ones, I have just been slow to put it together, so it may be an old one. All I know is this is frustrating, I want to fly this heli, but can't get past this issue.

Daniel, AMA # 923248

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12-28-2008 04:58 PM  8 years agoPost 22
McRex

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AZ-USA

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Here are some recent pics of the ugliness that happened in flight.

Daniel, AMA # 923248

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12-28-2008 05:37 PM  8 years agoPost 23
NTM

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Lloydminster,​Alberta, Canada

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It's possible to bind the pitch boss by tightening down the yoke too much on the brass slider bushing. The yoke will push on to the outer race of the pitch boss's bearings.
That'd definitally cause the ugliness in your pictures.

Regards,
Nathan

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12-28-2008 06:37 PM  8 years agoPost 24
Corrado-Italy

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Italy

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Yes, that is definitely what happened, pitch plate too tight and boss rotates together with tail. At that speed doesn't take too much for the screws to do what shown in pic.

Next pitch plate tighten it just to the point where it spins freely and doesn't have play.

Corrado

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12-28-2008 07:37 PM  8 years agoPost 25
topekadave

rrApprentice

topeka ks

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on mine i had to size the ball links on the blade grips and the boss was to tight so added a small spacer

------

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12-28-2008 09:04 PM  8 years agoPost 26
McRex

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AZ-USA

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Yes, you are all right, but what about it being stiff as far as sliding? The first assembly was not that tight, and still was not smooth sliding.

Daniel, AMA # 923248

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12-28-2008 09:55 PM  8 years agoPost 27
NTM

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Lloydminster,​Alberta, Canada

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With the pitch boss bound up like that it's likely that the yoke was introducing a side load into the pitch boss. Perhaps the roughness was caused by the slider fork then not being square to the pitch boss

As for the first time, you reamed the tail pitch links out ?
I just finished building mine and the tail is very smooth.

Regards,
Nathan

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12-28-2008 09:58 PM  8 years agoPost 28
McRex

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AZ-USA

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That could be, NTM I am trying a new one as we speak, hopefully this will clear it up. I'll let everyone know.

Daniel, AMA # 923248

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12-28-2008 09:58 PM  8 years agoPost 29
CatchMyStratus

rrNovice

Ohio

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From the first pic showing your damage, it looks like you have the links on the ball backwards. Hard to tell though. The outside of the link should have a noticeably smaller diameter, yours does not...unless you really reamed it.

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12-29-2008 02:48 AM  8 years agoPost 30
McRex

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AZ-USA

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I have a new set, that I don't see any difference from one side to the other, could you explain

Daniel, AMA # 923248

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12-29-2008 03:50 AM  8 years agoPost 31
CatchMyStratus

rrNovice

Ohio

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All the ball links have a direction. The side that needs to be facing outward when on the ball says "MSH" and has a smaller diameter hole. The inner side has a larger diameter hole and no "MSH".

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12-29-2008 04:26 AM  8 years agoPost 32
McRex

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AZ-USA

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my links on the grips don't have an MSH marking on them, they do have MSH markings on all the others, and yes I know to run them facing out, same as align links. The only markings on the grip links are a 1 and a 2, is that what you are referring to?

Daniel, AMA # 923248

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12-29-2008 04:42 AM  8 years agoPost 33
CatchMyStratus

rrNovice

Ohio

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Crap, sorry. Not sure why I was thinking the grip links had MSH on them. But they do have a direction. The numbers should be facing out.

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12-29-2008 05:18 AM  8 years agoPost 34
McRex

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AZ-USA

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I didn't know about those, didn't even notice the numbers until you said something, so thanks for pointing that out. I did swap it around earlier, and got a short hover in, and still doesn't seem quite right, I'm running out of things to check

Daniel, AMA # 923248

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12-29-2008 05:40 AM  8 years agoPost 35
CatchMyStratus

rrNovice

Ohio

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I'm running out of ideas as well. You said you assembled another tail from new parts and it's still stiff? Did you change out the brass slider plate? My tail is smooth, but not as free as my Trex 450 SE.

Lastly, check and make sure the tail shaft is not bent. (you never know!)

BTW, it looks like you have the old tailcase. Did you get the updated tail pulley with the longer pin? If not, definitely upgrade before you fly. It's free from the dealer you bought the kit from.

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12-29-2008 06:05 AM  8 years agoPost 36
McRex

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AZ-USA

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Yeah, it is the upgraded pulley, with the longer pin, and I have replaced the tail shaft just to cover all bases. You say yours is not as smooth as the t-rex 450? If so, I may be alright now. I will have to fly tomorrow and see, I appreciate everyones good input, thank you to all who participated! It helps out to have a resource like RR especially when you don't have anyone near you that flies heli's.

I'll update this tomorrow when I test fly it.

Daniel, AMA # 923248

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12-29-2008 02:37 PM  8 years agoPost 37
4cyclic

rrKey Veteran

Montreal, Can. and​northern Vermont

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from the pics, the pitch links aren't aligned correctly with the balls, that will bind the pitch actuation. The pitch link has to be parallel to the shaft Try putting a washer behind the balls or check if your tail grips if they are fully tightened.

Mine are aligned and properly reamed, but they are still a little stiff but perfectly acceptable . I much prefer having a little stiffness but no slop, then to spend time reducing slop everywhere .

Life is meaningful flying helis.

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12-29-2008 02:38 PM  8 years agoPost 38
4cyclic

rrKey Veteran

Montreal, Can. and​northern Vermont

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12-29-2008 02:51 PM  8 years agoPost 39
McRex

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AZ-USA

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hey 4cyclic, thanks for the tip, I'll definitely check that out later.

Daniel, AMA # 923248

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12-29-2008 03:37 PM  8 years agoPost 40
McRex

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AZ-USA

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OK, I checked the grips out, and one was clicked in, the both are tight, but apparently you can move them in and out on the actual hub, I was not aware of that, so one was mis-aligned. Hopefully that fixes it, does feel a bit smoother.

Daniel, AMA # 923248

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 3 pages [ <<    <     1     ( 2 )     3     NEXT    >> ] 2005 views
Scorpion Power Scorpion Power
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MSH Protos, Mini Protos
› Now we got it straitened out!
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