Frequently Asked Questions

 

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=================== Q U E S T I O N S ==================

 

Q.   What are the CrossFire 320E (“40-Size”) Specifications?


Q.  What are the CrossFire 320E (“60-Size”) Specifications?


Q,  What are the CrossFire 320E (“1/4-Size”) Specifications?


Q.   What are the Shipping Cost:


Q.   Is the CrossFire 320E wing one or two pieces and how is it      attached to the fuselage?


Q.   What is the CrossFire 320E Cowl Material?


Q.  What are the CrossFire 320E fuselage materials and construction techniques?


Q.   How is the CrossFire 320E wing constructed?


Q.  What control rods are installed and what type are they?

 

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1. What are the CrossFire 320E (“40-Size”) Specifications?


The 40-Size is still in prototype and the specifications are
indeterminate at this time; however, listed below are the tentative specifications, which are subject to change:

- Wing Span: ~53-54+” (TBD cm)
- Wing Area: TBD in2 (TBD cm2)
- Wing Chords:
- Root ~15”
- Tip ~9.3”
- MAC TBD”
- Wing Loading: TBD oz/ft2)
- Airfoil: Full Symmetrical
- Length (Spinner tip to tail) ~57” (TBD cm)
- Weight: TBD (Target < 5 lbs)
- Engine: 40 to 46 2-stroke
               60 to 75 4-stroke

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2. What are the CrossFire 320E (“60-Size”) Specifications?


- Wing Span: 64” (162.5 cm)
- Wing Area: 779 in2 (120.7 cm2)
- Wing Chords:
- Root 18” (45.7 cm)
- Tip 11” (27.9 cm)
- MAC 14” (35.5 cm)
- Wing Loading: 23 oz/ft2)
- Airfoil: Full Symmetrical
- Length (Spinner tip to tail) 60-1/8” (152.7 cm)
- Weight: 6.8 to 7.8 lbs
- Engine: 60 to 90 2-stroke
90 to 120 4-stroke

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3. What are the CrossFire 320E (“120-Size”) Specifications?


The 1/4 - Size is still in prototype and the specifications are
indeterminate at this time; however, listed below are the tentative specifications:

- Wing Span: ~85” (215.9 cm)
- Wing Area: 1535 in2 (9,903 cm2)
- Wing Chords:
- Root ~23-15/16”
- Tip ~12-3/4”
- MAC ~18-3/4”
- Wing Loading: < 21 oz/ft2 (target)
- Airfoil: Full Symmetrical
- Length (Spinner tip to tail) ~79-1/8” (200.9 cm)
- Weight: < 13 lbs (Target)
- Engine: 1.6 to 2.2 -- 2-stroke
                2.0 to 2.80 4-stroke

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4. Shipping Cost:


- Shipping is dependant upon the ship to location relative to our shipping point (Laguna Niguel, CA 92677).  The box size is roughtly 51" x 19" x 10.25".  There is an extra carboard carton placed around the "retail" display box for shipping protection.  Shipping insurance is optional and recommended at the customers expense.   Below are some examples to provide a rough cost in your area.


- In California
- Northwest
- Rocky Mountain Area
- Midwest
- North East Coast
- Florida

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5. Is the CrossFire 320E wing one or two pieces and how is it attached to the fuselage?


- 40 Size: (Still in Proto-typing, specs subject to change)


• The wing is a single wing, that is both wing halves are attached, yet is easily transported in a car.
• Mounting is by two ¼” dowel pins in the leading edge to the F3 bulkhead in the fuselage. The trailing edge is attached by two ¼ -20 nylon nylon bolts which go through the wing and into a hardwood block mounted to the fuselage.
• The fuselage wing cradle (socket) is ¼” wide balsa to which the wing’s top surface seats directly next to. The wing top surface is fiberglass coated to add strength.
a. The fuselage wing cradle (socket) is ¼” wide balsa to which the wing’s top surface seats directly next to. The wing top surface is fiberglass coated to add strength

- 60 Size:


• The wing is a single wing, that is both wing halves are attached, yet is easily transported in a car.
• Mounting is by two 5/16” dowel pins in the leading edge to the F3 bulkhead in the fuselage. The trailing edge is attached by two ¼ -20 nylon nylon bolts which go through the wing and into a hardwood block mounted to the fuselage.
a. The assembly manual shows how to add an optional “RTV” rubber bearing between the wing and the fuselage wing-cradle.
• The fuselage wing cradle (socket) is 3/8” wide balsa to which the wing’s top surface seats directly next to. The wing top surface is fiberglass coated to add strength.


- 120 Size: (Still in Proto-typing, Specs are tentative)


• The wing is in two pieces.
• The wing is attached to the fuselage and to each wing half by an aluminum tube-spar and two metal (TBD) guide pins.
• The fuselage wing cradle (socket) is 3/8” wide balsa, re-enforced with a 1/32” ply strip as the seat to which the wing’s top surface seats directly next to. The wing top and bottom surface is fiberglass coated to add strength.

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6. What is the CrossFire 320E Cowl Material?


- The cowl is made from ultra-light fiberglass and epoxy resins. It is light, yet very strong. It is pre-colored to the base color of the fuselage.

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7. What are the CrossFire 320E fuselage materials and construction techniques?


- 40 and 60 Size:


• The fuselage is constructed from light-3-ply, plywood and balsa. The fuse sides are balsa with a 1/16” AC-ply doublers.
• There are lightening holes is the rear part of the fuselage, under the turtle-deck.
• The fuselage is covered with Oracoat © which is the OEM source of Ultracoat ®.
• The turtle-deck, fore-deck and bottom are sheeted with 3/32 to 1/8” balsa depending upon the area covered.
• The is no plastics or foam in the fuselage or wing


- 120 Size: (in Proto-typing, subject to change, 11-15-03)


• The fuselage is constructed from light-3-ply, plywood and balsa. The fuse sides are balsa with a xxx” AC-ply doublers.
• There are no plastics or foam construction in the fuselage or wing.

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8. How is the CrossFire 320E wing constructed?


- 40, 60 & 120 Sizes:


• The wing is built-up form:


1. balsa ribs,
2. hardwood spars,
3. plywood spar boxes,
4. hollowed balsa wing tips
5. Solid (w/lightening holes) ailerons (40 & 60 size), built-up balsa and ply in the 120 size.
6. The wings “D-Tube” is sheeted with 3/32” balsa and each rib is capped with 3/32” balsa.
7. The trailing edge is a mini-D-tube made of 3/32” sheeting and 3/8” trailing-edge.
8. The wings center section is sheeted with 3/32” “harder” balsa and fiberglass coated.
9. The 60 and 120 sizes have balsa secondary spars.
10. Servo ready recesses are provided for concealed wing servo mounts, and a celluloid tube is provided in the 120 size to ‘string’ the servo-extension cable.

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9. What control rods are installed and what type are they?


- Elevator: The elevator servo is tail mounted in a pre-designated area. The control rod is:


• 40-Size: 2-56 threaded wire with metal clevises
• 60 & 120 Size: 4-40 threaded wire, w/ metal clevis


- Rudder: The rudder servo is mounted in the wing cradle area and is a pull-pull system. The pull-pull wires are pre-dressed in the fuselage. Metal clevises with knurled locking-nuts are used. (see web site for pictures)


- Ailerons: The aileron servos are edge-wise mounted in the in each wing panel and are concealed such that only the servo arm is exposed. Control rods are:


• 40-Size: Threaded 2-56 metal, w/ metal clevises.
• 60-120 Size: Threaded 4-40 metal, w/ metal clevises.


- Throttle: Plastic tube with solid-ribbed plastic control rod. The tube is pre-dressed, but allowing for the many different engine type. The user may wish to re-dress the throttle rod.


- Nose Steering: Heavy duty-plastic tube with solid-ribbed plastic control rod. The tube is pre-dressed.

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