Scale World Models 1/3 Super Cub Project
- Thread starter Bartman
- Start date
Bartman
Defender of the Noob!
Engine photos.
The firewall is a double layer of plywood and I reinforced mine with aluminum angle on both sides due to how I plan to use the airplane and because the plane was designed for a Zenoah GT-80 and I've got a BME-102 on it. Also, the firewall is built with zero right or down thrust so if you want to add any you'll have to shim your mount yourself.
There are two lines etched into the firewall which define the center of thrust but if you plan to use right or down thrust then you've got to offset your mount from those lines appropriately.
I haven't mounted the cowl yet, but will do so after the first couple of flights have been completed.
To make the maple/wood spacers behind the engine I bolted a few big fender washers to each hole of the engine's backplate and then used a router to follow the contour of the backing plate and washers, it worked pretty well but took a few tries to get the right router bit that wouldn't knock the ears off as I went around each time. Once I had the stack of spacers done and glued together I pegged the stack to a 4x4 and cut about 2 degrees of right thrust using my chop saw.
The hole in the center of the stack could have been bigger to make the spacer lighter but the BME-102 is already a lot lighter than the GT-80 so I figured a little extra weight wouldn't hurt.
Since there isn't an engine box hanging off the firewall, it's hard to say how a servo could be mounted without it being behind the firewall. THe fuel tank goes right behind the firewall so the only real option is to put the throttle servo back in the cabin which is what I did.
World Models supplies a 50 oz (1.5 liters) fuel tank which ought to be fine for the 102cc engine. The stopper design for the tank is a little funky but in the spirit of doing a complete review I've gone ahead and assembled/installed it! It'll get fuel for the first time later today so I'm hoping it works great! I'll post a few more later this afternoon.
Here are the pics;
The firewall is a double layer of plywood and I reinforced mine with aluminum angle on both sides due to how I plan to use the airplane and because the plane was designed for a Zenoah GT-80 and I've got a BME-102 on it. Also, the firewall is built with zero right or down thrust so if you want to add any you'll have to shim your mount yourself.
There are two lines etched into the firewall which define the center of thrust but if you plan to use right or down thrust then you've got to offset your mount from those lines appropriately.
I haven't mounted the cowl yet, but will do so after the first couple of flights have been completed.
To make the maple/wood spacers behind the engine I bolted a few big fender washers to each hole of the engine's backplate and then used a router to follow the contour of the backing plate and washers, it worked pretty well but took a few tries to get the right router bit that wouldn't knock the ears off as I went around each time. Once I had the stack of spacers done and glued together I pegged the stack to a 4x4 and cut about 2 degrees of right thrust using my chop saw.
The hole in the center of the stack could have been bigger to make the spacer lighter but the BME-102 is already a lot lighter than the GT-80 so I figured a little extra weight wouldn't hurt.
Since there isn't an engine box hanging off the firewall, it's hard to say how a servo could be mounted without it being behind the firewall. THe fuel tank goes right behind the firewall so the only real option is to put the throttle servo back in the cabin which is what I did.
World Models supplies a 50 oz (1.5 liters) fuel tank which ought to be fine for the 102cc engine. The stopper design for the tank is a little funky but in the spirit of doing a complete review I've gone ahead and assembled/installed it! It'll get fuel for the first time later today so I'm hoping it works great! I'll post a few more later this afternoon.
Here are the pics;
Bartman
Defender of the Noob!
Brought it outside to run it and the throttle linkage came loose at the carburetor. And it's tail heavy! I need a bigger engine! lol
But that old BME-102 that I was trying to sell for so long sucked fuel through a dry line and started on about the third flip after I opened the choke! Woo hoo!
But that old BME-102 that I was trying to sell for so long sucked fuel through a dry line and started on about the third flip after I opened the choke! Woo hoo!
Bartman
Defender of the Noob!
Thanks!Those Du-Bro Tundras look GREAT on it! Your stand off for the 102........Very nicely done.
PR Bushwheels
http://www.prbushwheels.com/
I actually bought the 8.75" tires even though the larger ones would be more technically correct for a 1/3 scale plane. The guys at PR thought the 8.75" ones would handle the weight OK but they wouldn't make any promises! A "Test Pilot" they called me!
And I paid retail
But they're good guys so I'll throw 'em a plug anyway!
Pa18
New to GSN!
Hi, Some more 8". hdttp://www.espritmodel.com/wheels-large-tundra-140---200mm.aspx
49dimes
Damn I'm hungry
Sorry for mistaking them as Du-Bros. The Largest Du-Bro "tundra" is 7" But not yet shown on their website. They do have a treaded lightweight 8" at a whopping $46.00 each.....Ouch! A pair of 6" Tundra's is only $36.00. And their nice and fat and inflatable. Not quite positive but the 7" T's I think are selling for 35 each. Go figure?
. Go figure?