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Avant RC - Mostro & Aurora Avant Mostro, Aurora, Electric eAurora, RigidCore Flybarless Head, Avant EFX and Avant FX Helicopter Support |
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12-30-2011, 10:35 AM | #1 (permalink) |
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Build Starts Today
So I purchased all of the parts except the Receiver and main blades. Also awaiting the the Carbon bottom plate and the RigidCore FBL head from CarbonXtreme but those won't stop the build.
Already have JR 8917HV Cyclics Outrage BL9188 on the tail CC120HV Ice 2 ESC Gryphon Extreme VR 700MX motor (I will switch to the Scorpion LE when I find one) Radix 105mm tail blades Still to get Edge 693 SE Premium Blades Spektrum AR7200BX Beast Receiver combo and satelite receiver as soon as it is available. So it begins
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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12-30-2011, 02:07 PM | #3 (permalink) |
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Spent about a 45 minutes sanding both frame edges. They were surprisingly rough.
Bags 1 and 2 are done. Moving on to Bag #3
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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12-30-2011, 02:20 PM | #4 (permalink) |
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good luck !
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Flying is life , the rest is details !!! |
12-30-2011, 06:42 PM | #5 (permalink) | |
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All of the other Helis (about 10) that I have built with straight cut gears, I have always set some lash in the gears and used the paper method to check mesh. The Avant manual appears to imply that the mesh should be as tight as possible.
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Thanks.
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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12-30-2011, 08:40 PM | #6 (permalink) |
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the manual is right.
follow it to the letter and you won't have any issues. |
12-30-2011, 08:44 PM | #7 (permalink) |
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congrats man, take it slow and enjoy!
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12-30-2011, 09:00 PM | #8 (permalink) |
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I was more worried that I was mis-interpreting the manual
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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12-31-2011, 06:01 AM | #9 (permalink) |
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Hey Jim,
Hope to see some pics soon, Chris
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"Just Fly It" AMA 819728 |
12-31-2011, 07:04 AM | #10 (permalink) |
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I sent you one in a text last night, I'll post some here after I wake up.
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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12-31-2011, 08:38 AM | #11 (permalink) |
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So yesterday, I started the build and took a few pictures along the way. Not as many as I would have liked but I lose track of space and time when I am building a helicopter (As my wife likes to tell me) so I kind of forget to take pictures.
So far the build has been very straight forward. The Tail drive gears were time consuming because of the need to take them apart everytime I swapped shims, and I think I tried every combination. Everything seemed to line up well in the end. Can't remember the shim combination I ended up with but I think it was .2 on both. The parts count looks huge in the bags but really it is low just like Avant says. Nothing is pre-assembled (which is good) so it looks like a lot more parts. The only other thing that I had problems with was the spring/roll pin in the vertical pickup shaft. Even after crimping one end and making sure everything was lined up perfectly, that little bugger was a b#@ch to push in. I had to use my bench vice to push it in after starting it with pliers. Ready for the build. That sure doesn't look like 1800 dollars worth of stuff. What's in the box More of what's in the box That doesn't look like too many parts Until you spread out the bags Sanded Frames ready for assembly Done through Bag #6. I skipped Bag #5, which is the CCPM bar and swash, so that I could put the skids on for a more stable build platform. I think Bag #6 should be before Bag#5 in the manual. I am working on Bag#5 Right now. I can't get over how narrow the frame is.
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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12-31-2011, 09:39 AM | #12 (permalink) |
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Hey Jim.
Looking real nice, That's thin.
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"Just Fly It" AMA 819728 |
12-31-2011, 12:53 PM | #13 (permalink) |
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Thanks Chris...and yes it is. The inside width is about 1/8 of an inch wider than the CC 120 Ice2 is thick.
About 1/2 way through Bag #7, At the end of this bag and Bag #8 (Boom Supports), The tail will be completely assembled and installed. Then comes Bag #9 which is the Head. I am still going to build the fly-barred head even though I am going fly-barless.
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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12-31-2011, 05:55 PM | #14 (permalink) |
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Bag #7 is done and the boom is on
Only two bad things I have to say about the build so far. 1. The tail blade holders and tail control arm design is kind of lame. Split design holders in plastic??? I think I am going to use 30 min epoxy for the balls screwed into plastic since I don't really trust them just screwed in. I am considering using it for the blade grips as well but they went in pretty tight. The other thing is the thread tap in the ccpm portion of the swash was lacking. I had to retap 2 out of three to get the balls to go in. I didn't resize them I just cleaned the threads with a tap and die. I used Red Locktite on the swash balls instead of Blue. Has anyone tried any other tail blade sets. It looks like the Kasama Srimok tail spindle and assembly would fit on the shaft. Might have to get the entire tail sliding assembly as well to make it work. Edit: I happened to find a Kasama/Tsubaki Sprag bearing online so I went ahead and ordered it and also the Kasama tail (What you see below) to give it a try. If it doesn't work, I'll sell it in the for sale section.
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
Last edited by rctazz; 01-01-2012 at 01:02 AM.. |
12-31-2011, 09:29 PM | #15 (permalink) |
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You want to set the main gear-to-pinion mesh a little bit tight at the highest spot on the main gear. The reason why is that the main gear "wears in" a little bit when you run it. You'll see white dust on the frame and the shape of the teeth on the main gear change a little bit to exactly match the pinion. It takes a few flights for this to happen.
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12-31-2011, 11:49 PM | #16 (permalink) |
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Thanks Justin,
I haven't done the final pinion to main gear mesh yet but when I do, I will set it like you said. I have another Question, I have the tail gears set correctly with no play and the transfer gears correctly set with no play but the auto-rotation gear has a little play with the transfer gear and the torque tube has a little slop as well. So the whole train has some slop. Not a lot but some. I don't see a way to fix the torque tube slop because the torque tube ends are larger than the pin that they ride on unless I put sleaving or shrinkwrap over the pins, what about the autorotation gear to transfer gear is there a way to adjust that? I know there is some adjustment on the top bearing block on the vertical shaft but I'm worried about throwing the gear train out of alignment. One more thing, regarding the tail drive gears. I have them set flush with each other, as the manual says, and they are very smooth. Should I add a shim to each to make them tighter as well? I only ask because at one point, I had them flush and pretty tight. The high point of the gears was a little sticky so I went down a mm on each and they run very smooth with no slop. How much will they wear in?
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
Last edited by rctazz; 01-01-2012 at 01:06 AM.. |
01-01-2012, 01:50 AM | #17 (permalink) | |
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Quote:
if you like bling there's nothing wrong with that though |
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01-01-2012, 02:56 AM | #18 (permalink) | |
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Quote:
I have seen a few posts of people wanting metal tail blade holders. I am not dogging the Aurora as I have one, am currently building one...and I am excited about it. But negative feedback is what makes things better. I can't be the only one that thinks the Aurora tail assembly is cheesy for a 90 size heli. I have built lots of Helis mostly Align which are usually considered low on the quality list. But I have never had to re-tap an align bolt hole and aside from replacing the blade grip holder bolts on the 700 tail and adding another bearing on the 700 tail (All based on HF feedback not on personal experience), the quality of Align components has always been top notch in my experience. Other feedback for Avant (And there may be reasons some or all of these questions),
That's all the questions I have so far as I am still in the middle of the build. Before someone deletes or puts this post in limbo, I am obviously not spamming or trolling as I have an Avant Aurora and I am currently building one. I am only affiliated with myself (Jim Cotter) These are legitimate questions and feedback from a person that is an engineer, someone who has built numerous helicopters, and someone who currently owns and is building an Avant Aurora. If you need to see pictures with the current date and maybe this post with the Avant, I will provide them.
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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01-01-2012, 05:46 AM | #19 (permalink) | ||||||||
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As for your previous question about the torque tube slop, you've got to realize that the torque tube is always under tension in one direction so the slop doesn't matter. If you tighten up the torque tube ends by putting paper or something in there, you'll have a hard time removing the tail if need be. If you break your tail boom in a crash, you want to be able to remove the torque tube ends without having to use a long needle nose pliers.
As for your question about adding another shim to the tail gears, you don't want to do this. They don't wear in like the main gear to the pinion. So you want them just touching (but not too tight). It sounds like you've got it right. Addressing your other questions: Quote:
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If you look through the AvantRC forum, you'll see that the Avant factory is working on a set of metal tail grips to offer as an "upgrade" for the Aurora. An aftermarket company named I2 RC is also developing a set of metal tail grips specifically to fit the Aurora. Unfortunately, neither the stock or the aftermarket metal tail grips are currently available. As mentioned earlier, you really don't want the AR bracket made out of metal. You've got to fly the helicopter awhile to figure this out. Hope this helps.
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01-01-2012, 08:51 AM | #20 (permalink) | |
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So basically, based on what you said about threading the 2mm balls into the plastic, I have to buy 3 new parts (44 dollars) and see if I can get the balls to thread into those holes without stripping them. Sweet.
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Jim Trex 250 ---- Trex 450 Pro ---- Trex550 FBL ---- Trex 700E FBL ---- Avant Aurora 90E ---- Goblin 700 Keep it off the Ground....but just barely
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