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Rave 3D 450
Rave 450 - Confidence in the tail gears?
jschenck

rrProfessor

La Vista, NE.

I picked up a used (near new) Rave 450 setup with 4S (-10 NextD Scorpion) and Radix-350's. It has a mini-G running a JR 3500 on the tail. Flew a couple of packs today. Tail felt really soft even though it held fine through some backwards flights.

But I'm gun shy with this heli. I've seen them strip tail gears mid-flight with bad results. It does have the white gears in there now. Will the black 3D gears make a big difference? Is there some other way to really strengthen the transmission assembly so it doesn't flex apart enough to strip gears (assuming that's what's happening when they let go in flight)

This heli auto's like a 600 - really like that part. It does fly "big", digging the 350's.

Team GrandRC

11-07-2011 Over year old.
littleman

Key Veteran

Westland Mi

Yes the black gears make a big difference. What I have done to alleviate tail issues, is to stick with 3s and 350's. I have found as long as your FBL it's even better overall. However, since yours is FB, you may want to stick with the 4s and I certianly would not go above 3200rpm. I run 3s with the 2221-8 motor, radix 350's, and a total-G. I run a governed 3200rpm.
A.J.

Proud member of Teams Castle, Byrons, Futaba & Nick Maxwell Products

11-07-2011 Over year old.
HOMEPAGE  
Wingman77

rrProfessor

Pulaski Tennessee

I have been flying the rave since it came out and I have thousands of flights on it, and the only time I have ever had the tail gears strip in flight was when the front vertical bevel gear support was bent and caused a bad mesh eating away the gears. I have been through many sets of gears landing in tall grass and such but never had any just fail in the air. I recommend looking at the front bevel gears after you fly it and if there is any gear dust around the block you have problems... if not don't worry about it failing it will be fine.

ps a quick pm to Mark will get this moved thread moved.

11-07-2011 Over year old.
HOMEPAGE  
Sky Dancer

Veteran

Bryan, Texas

If you are seeing a soft tail response, I'd first check your gain. What is your gain set for?

Since you picked up a used Rave, I'd also check the TR drive shaft for a split. You should not be able to twist the drive shaft holding the ends with your hands.

The early Raves had a front tail transition mount with a large cutout between the bearings and could bend easily in a crash. The revised mounts have a small cutout between the bearings and is much stronger. (SEE PHOTOS BELOW)

I'm also using the black gears and with the proper gear lash, I don't have any problems with TR gears at all.

That being said, I do like to use a small amount of White Lithium grease on the gears. It helps them run smoother and quieter. The grease probably helps in those extreme cases of very high head speeds coupled with hard flying, primarily because it helps the gears run a little cooler.

Don C

Keep up your rotor speed !

11-08-2011 Over year old.
husafreak

Key Veteran

Livermore, NorCal

I stripped my gears on the fourth flight and auto'd it no damage. Since swapping the gears and setting the mesh correctly (tighter that I thought at first) and keeping them greased I have over a hundred flights no problems. If you fly really well and hard 3D (like AJ!) then I would take his advice but I fly mellow 3D and 4s with HS set at 2900/2700. It flies really well at lower HS and seems really easy on gears and batteries. The extra weight may be good for me as it is smooth and steady even in high winds and at ridiculously high speeds and big air for it's size. If the heli you have shows the barest tiny bit of gear play and it has many flights on it like that than I'd say you are good to go, or at least copy that play with black gears. They both strip the same if not set correctly.

11-09-2011 Over year old.
jschenck

rrProfessor

La Vista, NE.

I took a close look at the front gears this morning - there is noticeable lash when rocking them back and forth so I'll look at it closely this weekend to tighten up the mesh. I couldn't tell if the case is the old style or not - probably is.

Thanks for the pointers here - kind of starting to feel like the crown gear on my Predator. Very nice and efficient but fragile and setup is critical. I'm leaning toward selling it and getting a belt driven heli just so I don't have to worry about gears. Too bad there isn't some way of easily putting the Trex-450 Pro gears on here since they look like they have a lot more meat to them.

Team GrandRC

11-10-2011 Over year old.
lazor 22

Senior Heliman

Wendell, NC

I just got a new-used rave today and I'm having the same confidence issues. I bought it because I like the frame layout and it is hands down the best looking 450 out there. But the tail gears have me worried. It has black gears all the way around and set them using paper to get backlash. They are a brand new set and they give a bit of resistance to turn. That's normal on this heli?

Lincoln; Team Compass, Protek/Amain

12-01-2011 Over year old.
husafreak

Key Veteran

Livermore, NorCal

I wish I could be more helpful but you have to fly the Rave and see how it goes, if you abuse the collective doing vertical climbs/descents and piro's over the landing pad with your finger on the (throttle hold) trigger hopefully you can test the mesh in a relatively safe area. If it holds up then go for it! The Rave is such a nice flying heli and with the gears set up correctly you can fly with confidence. It would be a shame to miss out on a great flying experience due to lack of confidence. Set up correctly you can fly as hard as you like.

12-01-2011 Over year old.
MarshallB

Veteran

Middle Arkansas

I just got a new-used rave today and I'm having the same confidence issues. I bought it because I like the frame layout and it is hands down the best looking 450 out there. But the tail gears have me worried. It has black gears all the way around and set them using paper to get backlash. They are a brand new set and they give a bit of resistance to turn. That's normal on this heli?
I'm not sure I would use the thickness of paper to set the mesh. That may leave the mesh too loose. Those gears are really small and that could cause a problem. If you actually are saying you set the mesh with paper as a gauge and it has some resistance, I would check it over good to see why there is a drag in the system somewhere. There are a few posts in this forum on how to set the mesh properly. Sky Dancer has a very good set of instructions on how to set the mesh properly.


CurtisYoungblood.com
Next-D
Spyder Batteries

12-01-2011 Over year old.
lazor 22

Senior Heliman

Wendell, NC

I mean I put a peice of paper in betweenand set mesh as suggested by AJ/Littleman.

Lincoln; Team Compass, Protek/Amain

12-01-2011 Over year old.
Ejeremy

Veteran

Bourbonnais,IL

Edit

Team Thunder Tiger
Team Radix
VP Powermaster Fuels

12-01-2011 Over year old.
MarshallB

Veteran

Middle Arkansas

I mean I put a peice of paper in betweenand set mesh as suggested by AJ/Littleman.
If you do set the mesh that way, make sure the gears are not way too loose.


CurtisYoungblood.com
Next-D
Spyder Batteries

12-01-2011 Over year old.
lazor 22

Senior Heliman

Wendell, NC

Ok took it apart looks like the back tail mesh is way to tight, and the guy must have glued on the tail box or something because it won't move at all . The rest of the gears run smoothly with each other.

Lincoln; Team Compass, Protek/Amain

12-01-2011 Over year old.
Ejeremy

Veteran

Bourbonnais,IL

Check to make sure the gear for the TT is pushed in all the way.

Also you can loosen the clap screw on the top to move the box back for a better mesh.

Jeremy

Team Thunder Tiger
Team Radix
VP Powermaster Fuels

12-01-2011 Over year old.
husafreak

Key Veteran

Livermore, NorCal

I recommend the least amount of play that you can get, there should be a tiny bit of play, not tight, but no more than the minimum. Grease won't hurt either, I use white Thunder Tiger Plastic Gear Grease, I get it from Readyheli.

12-02-2011 Over year old.
Jgatorman

Veteran

Birmingham, AL

Be very careful with the black gears for if they are to tight the friction will build up heat and melt the black tail gears. Ask me how I know.

12-02-2011 Over year old.
lazor 22

Senior Heliman

Wendell, NC

Well flew it today and had a really bad tail wag. Couldn't get my total g to get up on my computer so i could adjust gain but really wanted to fly it some (and this was at night with some flashlights)so did anyways even though I knew it was a bad idea. But got did the flight no problem and the drivetrain seems to run real smooth now. Hopefully I can get some good flights in tomorrow.

Lincoln; Team Compass, Protek/Amain

12-04-2011 Over year old.
littleman

Key Veteran

Westland Mi

if you had a bad tail wag even in a hover make sure that your TT didnt come pre-broken, By that I mean hold the head and try to turn the tail (gently) and see if it seems to move more then just gear play.
A.J.

Proud member of Teams Castle, Byrons, Futaba & Nick Maxwell Products

12-04-2011 Over year old.
HOMEPAGE  
lazor 22

Senior Heliman

Wendell, NC

It wasn't like a deathwag or anything. Seemed like a gain wag to me. Doing what you said, things seem fine.

Lincoln; Team Compass, Protek/Amain

12-04-2011 Over year old.
husafreak

Key Veteran

Livermore, NorCal

I have found the Total G to be finicky in hooking up to my laptop computer, if it happens I just restart power, cycle the USB connection etc. until it connects...

12-04-2011 Over year old.
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Rave 450 - Confidence in the tail gears?
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