Gyro on top=bad

[kgfly]

Main shaft is the shaft driven by the motor via the main gear. It has the head assembly on it whic is what the blades hang off. The gyro sense axis for a Futaba 401 runs vertically though the label so it has to be mounted with the label facing the sky or the ground. Other gyros have it 90deg around so they have to be mounted with their labels facing to the front, back or side.

[heliboy88]

Thanks a lot kgfly! Really appreciate your infos.
Happy flying!!

[Detroit]

I have the 450S. It looks like I can mount the gyro underneath with no problem at all as it is a solid flat surface all around where the tail boom goes through. Can I mount it without the plate? If not then I will get one.

[Finless]

YOu can but it will hang over a bit as the curve of the frames will not let it sit far enough back. Try it and see and if you feel it is not secure enough talk to Rick about a plate for the SA.

Bob

[Detroit]

Thanks Finless. I was at the field this morning. I think we left about 9:30 or 9:40. It was nice. I didn't have my bird as I don't have it done yet. Next weekend I will finish it. I still need the gyro and tail servo to complete it. Andy and Jay and a couple others offered to help me get it set up. A great bunch of guys out there. Looking forward to flying with all of you and learning also. Have a great New Year. I am going to stop out at the field tomorrow and see if anyone is flying.

[jurassic5]

I'm just getting a TREX SE.

I like this one :

http://www.microheli.com/mhshop/prod...roducts_id=337

Would you buy it instead of Rick's one ?

Happy new year,

Cédric

[Finless]

I still would get Ricks.... This puts the gyro lower and if you put your RX on the bottom rear it is very close to the RX which Futaba says you shouldnt.
Also this look more easily damaged in a crash as the gyro is much lower and kind of sticking out.

Just my opinion.

Bob

[Pinecone]

And I have heard of a couple of problems with the MH one, one came with different length arms. Several have bent.

And MH is not know for good customer service.

[jurassic5]

I confirm this Pinecone, a friend of mine ordered directly to MH.

Weak customer service.

[jwz]

Hi. My first post.
I'm gonna order a Trex 450se in the near future, maybe next week.
Then all the excess parts has to be ordered when I can afford it.
After reading this, I know that I have to mount the gyro under the boom.
If it was a little easier I would order Ricks mounting plate, but I live in Greenland, and I dont like the idea of shipping it all the way up here.
Can you pm me with instructions on how to make a homemade one before i get the heli? (I can make one myself when the heli comes i guess, but would rather spend time on it now, and then assemble the kit when i get that.)
I am NOT going to make mounting plates for others or to sell.

[Finless]

Please PM Rick user name rdlohr about that. I dont make them.

Bob

[rdlohr]

Shipped to Greenland is $19. No biggie, I ship all over the world.

Rick

[Martianpc]

What about putting the gyro sideways instead of top or bottom, wouldnt this work just as well? here is a pic i got from some other post on here https://www.helifreak.com/download.php?id=20835

[kgfly]

That looks OK but you have to be sure to maintain the correct orientation of the gyro sense axis. Those Align/Telebee gyros have to be oriented with the label perpendicular to the ground. Others, such as the GY240/GY401/L2100T/JR500 have to be oriented with the label parallel to the ground.

Also being held tightly to the boom block with a cable-tie like that could lead to too much vibration coupling into the gyro so don't over-tighten it.

In that photo the gyro is on the "safe" side of the boom but the rudder servo is still over on the exposed side, at risk of being hit by the main rotor. You would want them both on the left side of the boom to be protected from boom-strike damage.

[Martianpc]

ahhh, ok, I have a gy401 so i guess thats a no go, oh well, thanks anyway

[CatchmyCorsair]

Hi guys,

How does this gyro mount secure into the boom clamp? Are there some screws or is it glued with Shoe Goop? I saw one on a club member's heli and he said it was secured with a screw. I always thought it was glued.

Thanks.

[rdlohr]

There are many options to securing it. Here is an excerpt from my instructions...

There are 4 main approaches to mounting the Inverted Gyro Mount:
1) Glue the Inverted Gyro Mount in place. (SA, SE, XL & SuperFrame mounts)
Use Plumbers Goop to secure. Adhere to as many surfaces as possible to give the best grip. Avoid getting goop on the boom since you will want to adjust it periodically.

2) Screw it into the boom block through the bottom of the Inverted Gyro Mount. (SE mount only)
This method requires you to drill one hole through the boom block, and then tap the hole with a 3mm .50 pitch tap. Press the block into place and use it as a template to drill a #40 hole. Only drill through the first layer of metal which is only a few mm thick. Carefully tap the hole with a 3 mm .50 pitch tap. Use loctite on screw when installing. Make it snug but do not over tighten or you could break the bond between the inner block and the top block. You don’t want to strip the hole or damage the Inverted Gyro Mount.
I will drill the countersunk hole in the Inverted Gyro Mount and provide a 3mm stainless steel mounting screw if requested when ordering.

3) Screw into the Inverted Gyro Mount from both sides through the frame. (SE & SuperFrame mounts )
This method requires you drill a hole through your frames on each side. Screws will go through your frames into the small block on the Inverted Gyro Mount. Drill the frames first. Locate the new holes directly between the two existing holes. Use a bit that matches the other holes in the frame.
Press the mount into place, and then use the frame holes to drill smaller holes into the small block on the mount. Use a bit sized appropriately for your screws. Drill very slowly making sure to keep the drill perpendicular to the frame. Drill a separate hole for each side, rather than one hole clear through the block.

4) Stick on the Inverted Gyro Mount with double sided tape. (All mounts )
Use a thin 1/16”heavy duty double sided mounting tape like Scotch® Exterior Mounting Tape. Don’t use the 1/8” spongy type that comes with your gyro because it will make the gyro response a bit mushy.


Most people glue it with goop I think.
Rick

[Hunchman23]

I was actaully just about to mount my GY401 on my Trex450s cf the other night when I realized it wouldent fit under the frame unless I sanded the frame slightly. Of corse I dident wanna ruin the frame at all so I recalled having some carbon fiber cloth, and resin left over from a previous project and decided to make a plate similar to the plexy glass plate everyone else has. It came out awesome if I say so myself used 5 sheets of carbon fiber and about 6oz of resin. Best part is it matches the frame, although no one will ever see it lol. Ill update pictures later.

[rdlohr]

Just bumping this for all the new members that haven't protected their gyros yet...

Rick

[MuchMore]

Originally Posted by rdlohr

Shipped to Greenland is $19. No biggie, I ship all over the world.

Rick

Hi Rick...

Have you ever shipped to South Africa? Any idea on pricing if you have? Also, how much are your mounts for the SE?

thanx