Boomerang Ranger build thread - RCCanada - Canada Radio Controlled Hobby Forum
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Old 12-05-2021, 01:45 PM   #1
Wayne22
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Boomerang Ranger build thread


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Suggestion by another member here....

So, why the Ranger? I have been flying a Baby Boomerang for years now - my go-to jet, but I have out grown it. I have a CARF flash, but it had retract issues, and not enough power for our grass field (that is another project..)

A friend put his Elan up for sale, and I thought about it, and thought about it, and thought about it, and, of course, it sold before I made a decision. So I went to the Boomerang site looking to see what a new Elan would cost, and the Ranger immediately caught my eye! After deciding on the colour, I put an order in.

At the same time, I decided to take a technological leap into this century - all of my stuff is old, old tech. First off, was a new, small block kerostart turbine (my first) from xicoy. The Ranger comes with electric retracts and brakes, so that decision was already made, it also comes with a kevlar tank, and a double wall exhaust tube, so it is a pretty good value for the money!

The picture below shows what it will look like, once finished....
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Old 12-05-2021, 02:03 PM   #2
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Re: Boomerang Ranger build thread

The shipment of Rangers was not due until December sometime. With the container ship situation in Los Angeles, I didn't expect it until January 2022! I was pleasantly surprised when it was delivered to me on December 2nd.

Frankly, I personally have had bad luck with u parcel smashers delivering intact airplanes. This one almost kept their record intact!
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Old 12-05-2021, 02:09 PM   #3
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Re: Boomerang Ranger build thread

Cool project….I’ll enjoy following this 👍
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Old 12-05-2021, 02:09 PM   #4
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Re: Boomerang Ranger build thread

Fortunately, Boomerang double boxes the kits, with the inner box being a thick corrugated cardboard about 3/4” thick! The individual parts are wrapped in plastic, then wrapped in bubble wrap, then taped in place. They did an excellent job of packing, and there was no damage to the airframe!
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Old 12-05-2021, 03:03 PM   #5
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Re: Boomerang Ranger build thread

After unpacking, I dry fit everything together, and inspected the glue joints. I found a couple that could use some more hysol...

While that was curing, I sorted out the hardware.it looks pretty good, and the double G10 control horns were impressive. By personal preference, I am going to swap out the hinges.
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Old 12-05-2021, 03:21 PM   #6
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Re: Boomerang Ranger build thread

On to assembly! First was gluing the rudder hinges...this has to be done before the fin is attached to the rear fuselage. I forgot to mention that the fuselage comes in 2 sections, which makes it possible for them to pack it more efficiently in a smaller box. The fin and stab will have to be attached to the rear section before the two halves are joined together.

Back to the rudder, and the first hurdle.....because the rudder is tapered, the rounded leading edge increases in diameter from top to bottom. The hinge point cannot be at the center of the leading edge radius. It took some trial and error to find a sweet spot for the hinge line that allows for decent rudder movement, does not bind, and does not leave a huge gap! The builder needs to take the time to get this right before applying any glue.....it took me maybe half an hour..

With the hinges curing, I attached all the servo brackets to the wing servo hatches...lots of pieces coming together.

Speaking of servos, I settled on Savox for the wing, but the tail section will not accommodate standard size servos......either thin wing servos, or minis are needed. In order to get the torque I need out of these little servos, I am going to have to use high voltage servos throughout....so I had to change my servo selection and reorder HV wing servos, and waiting for them to arrive......
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Old 12-05-2021, 05:10 PM   #7
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Re: Boomerang Ranger build thread

The 2.5 mm push rods look pretty flimsy compared to 2-56 or 4-40 rods in the picture below. Even though, they are short, they will be replaced. Everything else looks good, though.....
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Old 12-05-2021, 06:18 PM   #8
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I assume you mean you are replacing with 4-40 rods as 2-56 is actually smaller than 2.5mm.
2-56 is approximately 2.2mm.
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Old 12-05-2021, 07:32 PM   #9
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Re: Boomerang Ranger build thread

Thats, the plan.....so far.....
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Old 12-06-2021, 12:56 PM   #10
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Re: Boomerang Ranger build thread

Hi Wayne
Did a look at some if the specs and looks like it is pretty heavy at 20 plus pounds for 700 something square inch wing area ; if they claim “real slow landings “.
For the tail on my Redwing Gryphon , I used Mks servos ;light , strong but not cheap.
Think these were the ones , also avail as a side mount :https://thunderboltrc.com/index.php?...oducts_id=2185
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