Trex 550 Lower Radio Tray - Use it? - HeliFreak
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Old 09-01-2013, 07:42 PM   #1 (permalink)
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Default Trex 550 Lower Radio Tray - Use it?

Hi all,

Working on a 550 frame and was wondering how many of you use a radio tray in the lower slots of the 550. ? I thought the kit came with 2 trays but all the ones I have seen around people are just running the upper.

Eliminating the lower slots will save time more then weight since the slot are cut with 1/16" end mill.

Thank you for the help.
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Old 09-01-2013, 07:43 PM   #2 (permalink)
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Quote:
Originally Posted by kregan View Post
Hi all,

Working on a 550 frame and was wondering how many of you use a radio tray in the lower slots of the 550. ? I thought the kit came with 2 trays but all the ones I have seen around people are just running the upper.

Eliminating the lower slots will save time more then weight since the slot are cut with 1/16" end mill.

Thank you for the help.
Nice job !!!

How much weigth that ??
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Old 09-01-2013, 09:34 PM   #3 (permalink)
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I have my iKON FBL unit mounted on the shelf just below the tail rotor servo. Receiver is mounted on the bottom shelf, just above the skids. The plates where already there. If they weren't there, I imagine I would've mounted the iKON and receiver on the sides, outside. Long canopy covers up a lot.
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Old 09-01-2013, 11:33 PM   #4 (permalink)
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Thank you,
2.8 ounces is the weight.

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Originally Posted by Nelvick View Post
Nice job !!!

How much weigth that ??
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Old 09-02-2013, 07:53 AM   #5 (permalink)
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That looks awesome!

Although If you're making these to sell I'd say keep the mounting position for the lower gyro tray - I was going to strap my RX battery to it but in the end I put it under the main flight pack for balancing reasons, but if I go 12s in future I'll need to move the RX pack to the rear to help balance it again.

Taking out a standard frame feature like the lower Gyro position will only limit your market and cause issues for people who need it, purchase your frames then find its be omitted.

What a really really like is the fact you've included the option to run a 3rd bearing block under the main gear. That would be a great product to offer! A a quality 3rd bearing block and a reusable frame drilling template (tough material like steel) so anyone could accurately drill their CF frame - the only option today is the Hobbyking bearing block which comes with a rubbish bearing and made from soft alloy, QuickUK used to make a great 600e lower mast block but that is now out of production - and with these you'd have to do your own measurements and likely mess up the install.
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Old 09-02-2013, 03:22 PM   #6 (permalink)
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I wanted to mount the Robird down there but the USB port isn't accessible.
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Old 09-02-2013, 03:25 PM   #7 (permalink)
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Quote:
Originally Posted by Lunar Wolf View Post
T

What a really really like is the fact you've included the option to run a 3rd bearing block under the main gear.
The Xtreme Racing frames for the 550 also have the holes for an extra bearing block.

http://www.xtremercheli.com/T-REX_550.cfm

The reason almost nobody uses one is because a third bearing block would only be useful if someone made a 550 length shaft for it.

Quote:
Originally Posted by Lunar Wolf View Post
A a quality 3rd bearing block and a reusable frame drilling template (tough material like steel) so anyone could accurately drill their CF frame - the only option today is the Hobbyking bearing block which comes with a rubbish bearing and made from soft alloy
Why can't you just buy a set of Align ones? Or buy the Helioption single piece bearing block and use one of your original leftover ones as the third block?

Quote:
That would be a great product to offer! A a quality 3rd bearing block and a reusable frame drilling template (tough material like steel) so anyone could accurately drill their CF frame
No just make the jig plate from lexan or somthing similar with pressed in steel drill bushings and M3 pins that go into the screw holes on the frame to line it up.
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Old 09-03-2013, 12:02 AM   #8 (permalink)
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Thanks for the feedback guys!
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Old 09-03-2013, 12:16 AM   #9 (permalink)
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I have my Vbar sensor on the lower tray
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Old 09-03-2013, 01:44 AM   #10 (permalink)
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Quote:
Originally Posted by Atomic Skull View Post
The reason almost nobody uses one is because a third bearing block would only be useful if someone made a 550 length shaft for it.
H60159

Quote:
Originally Posted by Atomic Skull View Post
Why can't you just buy a set of Align ones? Or buy the Helioption single piece bearing block and use one of your original leftover ones as the third block?
The problem with the upper bearing blocks is the bearing size, you will not find a bearing with the correct 9mm ID and the OD to fit that block. I have those blocks spare since running the KDE parts, i'd use them if I could.

Last edited by Lunar Wolf; 09-06-2013 at 06:44 AM..
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Old 09-05-2013, 09:57 PM   #11 (permalink)
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If you notice I used slots instead of holes for the bearing block mounting spots so both 600 and 550 bearing blocks will fit the frame.
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Old 09-05-2013, 10:36 PM   #12 (permalink)
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Quote:
Originally Posted by kregan View Post
If you notice I used slots instead of holes for the bearing block mounting spots so both 600 and 550 bearing blocks will fit the frame.
That's going to make lining up the 550 blocks a bit more difficult.
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Old 09-06-2013, 07:08 PM   #13 (permalink)
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Quote:
Originally Posted by Atomic Skull View Post
That's going to make lining up the 550 blocks a bit more difficult.

No the slots will not allow for adjustment. The 600 blocks will use the outer part of the slots and the 550 will use the inner part of the slots. No adjustment will be available.
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Old 09-14-2013, 03:24 PM   #14 (permalink)
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Let us know when they are ready. I have one ready for this frame.
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Old 09-15-2013, 12:42 AM   #15 (permalink)
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I have to make a very minor adjustment to the frame around the canopy mounting hole and that's about it.
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Old 09-17-2013, 11:24 PM   #16 (permalink)
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That adjustment made yet?
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Old 09-18-2013, 08:07 PM   #17 (permalink)
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Originally Posted by pc3associate View Post
That adjustment made yet?
All finished! I will have the frames added to the web site tomorrow or Friday and I have already cut a few sets. I need to get some better pictures of the frames and pictures of my competed test frame that shows how I wired it for a nice clean look.

I am really happy with this frame. While it will accept both the 550 and 600 bearing blocks it is about .49 inches shorter then a 600 frame so I will be drawing the same frame style for the older Trex 600e and clones like the HK600. The 600e kit will be exactly the same layout but use the 600e lower frame tray of course be a bit taller.

I will post more on my CNC Effects facebook page soon.
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Old 09-19-2013, 03:26 PM   #18 (permalink)
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Here are a few pictures of the frames. The bare frames are finished but the frames pictured with electronics are straight off the machine with no finish work so they are a little rough.

That is a 12s setup for my aging A123 cells. Still pumping strong after all this time... I have pictures of the cells being made in the A123 forum, its been years! LOL. Since I also fly 2 meter pattern planes the 10s 5000 packs should work in place of the A123's if they ever die.
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Old 09-20-2013, 09:52 PM   #19 (permalink)
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Ordered one first thing this morning. Let us know when the 600 frame is available and I will hit that order button as well.
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Old 09-21-2013, 02:02 AM   #20 (permalink)
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What is the head height with the 600E mainshaft and the third bearing block compared to the standard 550 shaft?
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