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Builder's Manual
Thank you for purchasing the Boomer EX2. The Boomer was designed with love and dedication by Mike
Baker to be an easily assembled and fun entry level discus launch glider (DLG).
Specifications:
Wingspan: 33.5"
Wing Area: 318.25 sq. in.
Weight with 2/3 370 NiMH batteries: 5.5-6.5 ounces
Required Equipment
2 Channel radio with elevon mixing
!
Micro receiver
!
2 Micro servos
!
370mAH 2/3 AAA 4cell NiMH or 2 CR2 Lithium Camera Batteries
!
Parts List
2 ea – Foam wing cores
2 ea – 1/8" Balsa elevons
2 ea – Ply control horns
2 ea – Ply launch pads
1 ea – Carbon Fiber tail boom
1 ea – Ply tail boom anchor
2 ea – Wire L-bend pushrod ends
2 ea – Wire Z-bend pushrods
1 ea – Heat shrink tubing
2 ea – Carbon fiber tape
2 ea – Plastic pushrod tubing
2 ea – Tails
1 ea – Packing tape
Items required to complete your Boomer.
Spray adhesive (Most spray adhesives can melt the foam if used in excess so it's wise to experiment on
scrap foam)
220-grit sandpaper
5-minute epoxy
Thin CA
X-acto knife
Boomer EX 2
Mountain Models
465 D Street
P.O. Box 762
Penrose, CO 81240
www.mountainmodels.com
1
Phone: 719.372.6727
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Related Manuals for Mountain Models Boomer EX 2
Summary of Contents for Mountain Models Boomer EX 2
- Page 1 Boomer EX 2 Builder’s Manual Thank you for purchasing the Boomer EX2. The Boomer was designed with love and dedication by Mike Baker to be an easily assembled and fun entry level discus launch glider (DLG). Mountain Models Specifications: Wingspan: 33.5”...
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Page 2: Assembling The Wing
Assembling the wing 1. The first step is to shape the wing tips and clean up any residue from the hot wire cutting. Be careful with the difference between EPP and EPS foam as they are of different consistencies and respond to sandpaper differently. - Page 3 Color and tape 1. If you wish, you can now paint your plane with acrylic or latex paint or good old magic markers. It’s wise to test whatever method you choose to use on scrap foam. Another point worth mentioning is that the Boomer is rather happy inverted so it is wise to be able to differientiate the top of the wing from the bottom so you can orient from the ground, so ensure that you make a high contrast difference top to bottom.
- Page 4 Elevons 1. Align the 1/8 ” balsa elevons to the TE (Trailing Edge) of the wing’s outside edge and ensure that they are 3/8” from the wing center. Adjust as needed so that the tail section will fit. 2. Sand the bottom of the elevon from the bottom of the LE (Leading Edge) to the top of the TE to a point.
- Page 5 Installing radio gear Note: You have the option of installing your gear from the top of the wing or inside. The inside mounted gear is cleaner but the top mounted is easier. 1. Temporarily tape the wings together. 2. Position your battery and receiver on top of the wing opposite each other as far forward as you can comfortably install them.
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Page 6: Installing The Pushrods
Installing the pushrods Note: Ensure that the servos are centered. Plug the servos into the receiver, turn on the transmitter insuring that the trims are centered and plug the battery into the receiver. Adjust the servo control horns so that they are positioned 90 degrees to the servo. 1. - Page 7 5. Slide the slotted end of the carbon fiber rod into the slot in the tail and adhere with epoxy. Don’t use too much, epoxy is heavy. 6. Lightly sand the bottom of the carbon rod in front of the tail. 7.
- Page 8 8. If you wish, you can add micro balloons to the epoxy to save weight. 9. Tape the wing halves together with packing tape down the middle both top and bottom. 10. Turn the wing upside down and place the tail over the bottom of the wing and note the position of the rod.
- Page 9 Flying 1. Check the CG, it’s 4.75” to 5” behind the very front of the wing. Add weight to the nose as needed. Check the lateral CG – wing tip to wing tip. If it’s unbalanced it may cost you. Add weight to the lighter wing, I use a quarter slid into a slot I cut into the wingtip.
- Page 10 Wingtip Guide...