How do you mount a tank in a full fuse?

[Paul Taylor]

OK I called my Tech support guy and he took off early on Friday I guess cause I got VM. The Slacker...

I have been mounting tanks on Profiles for a few years now and I think I have that down. Stole enough ideas from you guys so figure I would do the same with the Akrobat Project.
I have a clunk tank and it fits nicely in place.

I assume I secure it in place so it will not flop around. Do I need to put some foam around it to help keep the fuel from foaming.
LA .46 is the engine. (And I saved 2.3oz buy changing out the muffler!)

Any photos of what you have done?
Thanks guys!

[W.D. Roland]

Good question Paul
I am not happy with any of the methods recently tried.

As a kid just epoxied them in and the world was right.
Apparently the laws of physics have changed some and this is no longer true.

If made accessible and removable as well as adjustable the seem happy as installed.

The Smoothie tank is held tight in place by the hatch.
The Chipmunk tank is held in with 4 screws through solder on tabs at top of tank. the screws go into the motor mounts.
On the Shark there is less room than on the Chip for some reason??
The tank is held in with some balsa sticks super glued across the bottom and a chunk of Styrofoam to keep it positioned for and aft.

All work but not total happy with any so far.
Hope others post there methods as I am out of ideas on this.

So once upon a time on profiles a tank mounted with the tank center line even with the center of the venturi would be just about perfect.
So why is it that my current profile needed the bottom of the tank even with the venturi to get the same upright and inverted RPM? Heck it just an old O.S. .35s.

I suspect Howard or someone has screwed with the laws of physics while I was off playing with R/C toys.

Gravity sucks

David
 

[Tim Wescott]

I don't know how one does this, I just know how I did it.  Wanting to leave things adjustable, I rearranged the hatch a bit on my Nobler, and shoved a rectangular plastic tank in there.  It's retained by stuffing the space underneath it with foam rubber.

It works great, and its lasted for five whole flights now.

[Noel Corney]

Try some velcro, I have a 1" square on one side of an 8 oz tank in my T/P for the PA75 small strip of ply at the rear and a balsa wedge to ofset the front.I had thought it might not work ,but hasn't mooved yet. Have to slide a peice of plastic between the velcro to get the tank out. Scruf up the tank with some coarse sandpaper and use polyurathane glue on the velcro .Noel

[Eric Viglione]

For what it's worth, here's how I do mine...

I glue in side rails made from hard scrap balsa front to back a 1/4" or so below the level of the tank to give me room to shim. You will have to play with the length to get it so you have just enough room to slide the tank in at an angle. (See pic's)

Slide the tank in. Cut out a tank floor shim (or not, up to you. These pic's are from my first Starfire. My second Starfire, I didn't bother with a floor, I just have the cross shims)

Add cross shim's. If you need to shim under the tank, use thinner cross shims. Put a little dab of RTV silicone on the shim joints to hold in place. Go fly it. If you have to adjust tank, peel off the little dot of RTV, re-shim, put back and go fly some more. Pretty simple.

Hope it helps,

EricV

[Brian Hampton]

With plastic clunk tanks I pack them top and bottom with foam and use foam on the sides to angle the back of the tank out as far as possible and I cover the tank compartment with 1mm ply so the tank doesn't fall out when the cowl is removed. I also use RC style engine mounts so there's no engine bearers to obstruct the tank compartment.

(G'day Noel, can I fly your plane? Oops  ).

[Dwayne]

With plastic clunk tanks I pack them top and bottom with foam and use foam on the sides to angle the back of the tank out as far as possible and I cover the tank compartment with 1mm ply so the tank doesn't fall out when the cowl is removed. I also use RC style engine mounts so there's no engine bearers to obstruct the tank compartment.

(G'day Noel, can I fly your plane? Oops  ).

Hi Brian, I don't want to hijack this thread could you please start another showing your set up, I've always wondered about using R/C engine mounts.
Thanks
Dwayne