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RE: MX450 XS Discussion Thread
I agree about the tape, but i have not order any new blades yet.. still waiting on a few parts ( Be careful when Tightening screws ) but i plan to fly this sunday with the stock blades on its first flight
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RE: MX450 XS Discussion Thread
I flew this afternoon and lost one screw from the seesaw. I was only 10ft off the ground at that point so I was lucky and was able to bring her down softly.
I took some screws fom my donor heli and thread locked them. Make sure you check those, you can't see them directly. |
RE: MX450 XS Discussion Thread
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The experience of loosing a screw helped the tracking issue. Since they are a bit hidden I missed them. I have a new screw in there, thread locked and tightened both, it tracks right on target.:Dhttp://image.rcuniverse.com/forum/up...68/Tr50610.jpg
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RE: MX450 XS Discussion Thread
TEX,
Great to hear about you finding the tracking issue:) I had one problem similar but turned out it was an out of spec (bad machining) bearing seat/stop in an aftermaket CNC main blade grip. When the darn head was stationary...I never found it loose. When it was rotating, the centri-forces on the grips would deform the bearing stop just enought to drop it about the 1/4 mark. The material that was supposed to retain and center the bearing was drilled out to large. Drove me nuts for weeks....could have lost a blade as weak as it was. This was ofcoarse the old "Sport 500" .45 nitro heli I used to have:) Chris |
RE: MX450 XS Discussion Thread
How did you like the nitro compared to the 450?
My friend and I are arguing the fact that I should have gone to nitro instead, but I like the ease of electrics. |
RE: MX450 XS Discussion Thread
Is anyone one having a problem with the tail .. Using a 240 gyro and have the AVCS off.. i cant get Enough throw to get the Heli to spin on the ground in any direction.. i have expanded the push rod to where it has fallen apart with out to much force from the servo .. any ideas ??
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RE: MX450 XS Discussion Thread
ORIGINAL: sammy64 Is anyone one having a problem with the tail .. Using a 240 gyro and have the AVCS off.. i cant get Enough throw to get the Heli to spin on the ground in any direction.. i have expanded the push rod to where it has fallen apart with out to much force from the servo .. any ideas ?? If the rudder servo works normally then it is possible the gyro is damaged. Check the pitch slide on the shaft, it should move smoothly with the link off. If not try a drop of oil. What radio are you using? |
RE: MX450 XS Discussion Thread
I have tried it with the Gyro out of the picture and its the same ..Iam using an Futaba 6EXH W/3107 servos .. I think you mite be right about the EPA settings .. will chk in the AM
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RE: MX450 XS Discussion Thread
ORIGINAL: sammy64 I have tried it with the Gyro out of the picture and its the same ..Iam using an Futaba 6EXH W/3107 servos .. I think you mite be right about the EPA settings .. will chk in the AM |
RE: MX450 XS Discussion Thread
I've noticed the the slider won't work right until the black coating wears off. It also helps to taper the bushing taking away the sharp edge. The oil will help greatly in the workings also.
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RE: MX450 XS Discussion Thread
Yes setting the EPA worked .. still think it mite need a little more.. i will keep working on it .. think about getting some sand paper and running the motor to sand down the tail shaft to see if thats the answer .. got to get this thing flying soon or its back to the AXE
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RE: MX450 XS Discussion Thread
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Thanks to Osterizer I got my Mahblades today. They are very nice and completely balanced. I am very impressed.http://image.rcuniverse.com/forum/up...68/Mk27227.jpg
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RE: MX450 XS Discussion Thread
ORIGINAL: sammy64 Yes setting the EPA worked .. still think it mite need a little more.. i will keep working on it .. think about getting some sand paper and running the motor to sand down the tail shaft to see if thats the answer .. got to get this thing flying soon or its back to the AXE |
RE: MX450 XS Discussion Thread
Ya the EPA works but the fix is a few things i think in my case .. first i sanded down the tail shaft with Emery Cloth until it was shinny (Thx RollingBall for the Tip ) .. Used White grease and as the tail was still running ( yes i was running the motor during the sanding ) i put on the Tail pitch plate .. powered down and finished the repair .. When i put the tail blade holder back on i slid it back to about 1.5/2.0 mm from the end ( i think this is what fixed the issue because it was flush to the end of the shaft when i started ).. The tail rotor now can pitch the heli in any direction after this repair .. Few more bugs to knock out and i think i will be flying ..
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RE: MX450 XS Discussion Thread
ORIGINAL: sammy64 Ya the EPA works but the fix is a few things i think in my case .. first i sanded down the tail shaft with Emery Cloth until it was shinny (Thx RollingBall for the Tip ) .. Used White grease and as the tail was still running ( yes i was running the motor during the sanding ) i put on the Tail pitch plate .. powered down and finished the repair .. When i put the tail blade holder back on i slid it back to about 1.5/2.0 mm from the end ( i think this is what fixed the issue because it was flush to the end of the shaft when i started ).. The tail rotor now can pitch the heli in any direction after this repair .. Few more bugs to knock out and i think i will be flying .. |
RE: MX450 XS Discussion Thread
What size of main blades are you guys using? 315 or 325mm. The reason why I'm asking is Curtis Youngblood is now making his Radix blades in 325mm.
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RE: MX450 XS Discussion Thread
315s or 325s will work on the 450. You supposedly need the tail extension for 325s on the 400, which is kind of odd; I have gotten blades that were sold as 315s that were actually 325. Go figure.
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RE: MX450 XS Discussion Thread
ORIGINAL: osterizer 315s or 325s will work on the 450. You supposedly need the tail extension for 325s on the 400, which is kind of odd; I have gotten blades that were sold as 315s that were actually 325. Go figure. He's right, 315 and 325mm blades will work on the 450. |
RE: MX450 XS Discussion Thread
Yep-- one of the things that makes a 450 is the extended boom. I just wonder what would happen to an MX400 that had 315-marked blades mounted that were actually 325mm hinge to tip.
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RE: MX450 XS Discussion Thread
well tried the stock blades and do they SUCK .. even balanced they make the heli shake spinning down .. i need to go get some different ones .. i still want to hover this thing before the weekend is up .. my tail problem has come back also .. think i will do the tail boom mount and grab some CF rods at the LHS .. seems like the push rod is bending during the push process even with the boom braces .. you can hear a vibration when the servo is pushing .. just got to keep working at it i guess .. going to try a Trex tail shaft also and see if that does helps any ....
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RE: MX450 XS Discussion Thread
That rattling in the tail bracket is what makes the CF conversion attractive to me. It's old news that you don't run steel pushrods through a steel bracket on an a/c because they create RF noise when they rattle. Whether the same is true about steel-v-aluminum I don't know.
I think as an alternative I'm going to try adding some nylon bushings on the bracket to stabilize it; I don't have any problem with the pushrod action, but I don't want it rattling around. |
RE: MX450 XS Discussion Thread
Well i went a head and replaced the tail shaft/tail pitch plate and blade holders with Trex parts .. everything fit just right and then i mounted a tail boom servo .. works like a charm .. gyro works great .. the CG seems to be off now and is tail heavy .. i flew it tonight with some LiPos for my AXECP ..got a few minutes of hover .. also put some Align Wood blades just to get it off the ground.. this thing is sweet .. need to do some trimming ...
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RE: MX450 XS Discussion Thread
ORIGINAL: sammy64 Well i went a head and replaced the tail shaft/tail pitch plate and blade holders with Trex parts .. everything fit just right and then i mounted a tail boom servo .. works like a charm .. gyro works great .. the CG seems to be off now and is tail heavy .. i flew it tonight with some LiPos for my AXECP ..got a few minutes of hover .. also put some Align Wood blades just to get it off the ground.. this thing is sweet .. need to do some trimming ... |
RE: MX450 XS Discussion Thread
i have a 2 on order but i just wanted that thing to fly .. i will hover it again this morning with what i have and mite take the AXE out today also
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RE: MX450 XS Discussion Thread
Iam also back to the dang main gear and the head play .. i can keep tighten the screw on the bottom of the main gear but after a few minutes it comes lose again.. i have even used CA to LOCK it but still comes lose .. i order from tower part# HMXE-8210 to replace all of the bottom end of that thing.. i cant wait to get these battery's charged so i can go hover some more .. i will take pictures of the tail as soon as the wife brings my camera back ..
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