Humbrol Tiger Moth

[TheLurker]

Morning,

Polypropylene, recycling code 05, and about 0.5mm thick.

Cheers,
Lurk

[Jmk89]

Morning,

Polypropylene, recycling code 05, and about 0.5mm thick.

Cheers,
Lurk

Many thanks, O Lurk

[cvasec]

I had a friend 3D print some. There is a hole but it really needed drilling out. As good as the original ones.
Ron

[Piecost]

Very good Ron, but they look like some kind fungle growth!

[Prosper]

. . . but they look like some kind fungle growth!

Eeuuugh - never mind AI - that stuff is gonna take over the world

[OZPAF]

 

[Jmk89]

I remembered that I have already done a 3D printing exercise for pinclamps.  I have uploaded an .stl file that will print a dozen pinclamps.  Like Ron's (Cvasec), the hole sometimes needs clearing with a drill (0.7mm seems pretty good for standard T-pins.  Thicker or thinner pins need larger or smaller holes to get the right interference fit).

[Jmk89]

The upload is the the Plans Gallery in the Miscellaneous section.

[Jmk89]

A couple of photos of my 3D printed pinclamps.  The second picture shows the convenient way of storing these until needed on one pin shaft.

[Piecost]

Thanks for the useful pin clamp information. It could do with moving to a more findable location.

Back to the model...

CO2 tank location

I am ready to assemble the fuselage and I am thinking about the CO2 tank location.

I note the following examples shown on plans;

1. Humbrol Tiger Moth 19" span (this model)
    Tank immediately behind motor
    very forward of CG
    Protruding out top of nose
    Tank is vertical
    (See post #3)

2. Stan Cole Tiger Moth 18" span
    Tank in front of cabine struts
    Forward of CG
    Approximately 5 degrees from vertical
    Protruding slightly below fuselage

3. Aerographics Tiger Moth 20" span
    Tank half way between motor and front of cabine struts.
    Far forward of CG
    Vertical & fully enclosed.

My original installation:

4. My original installation
     Tank in front cockpit, at CG
     Protruding out of cockpit
     Vertical
     [See photo]

Proposed installations:

5.  Proposed installation with tank fully enclosed     
    Tank at front cabine strut
     Forward of CG
    Tank is fully enclosed
     Tank is 30 degrees from vertical (is this too much?)
     [See photo]

6. Proposed installation with tank vertical and protruding below the fuselage
Tank at front cabine strut
     Forward of CG
     Bottom of tank is exposed
     Tank is vertical
     [See photo]

Questions:

Is the tank being 30 degrees from vertical too much?
Is there an advantage or disadvantage for the tank being forward of the CG?

Option 6 is my favourite so far. What do you think?