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78'' Extra

SnowDog

SnowDog

Moderator
Congrats Daren! Sounds like quite an adventure and kudos to friends willing to sacrifice a servo to get a good maiden landing!
Love the smiles...that says it all!
 
wedoitall

wedoitall

Member
thats awesome Darren! shes a beautiful plane, glad there was no damage, very glad.

so it takes a gallon or two to breakin these motors. on the 2 and 4 strokes ive messed with before, usually half gallon max and they were broke in. But i hvent messed with plane engines yet
 
cwojcik

cwojcik

70cc twin V2
One indication that break in has neared completion is when the engine stops spitting black crap out of the exhaust when properly tuned, which is normally aluminum debris from the engine wearing in.

The motor runs great though, I think the ring, reeds, and sealing made a difference.
 
dth7

dth7

3DRCF Regional Ambassador
cwojcik said:
One indication that break in has neared completion is when the engine stops spitting black crap out of the exhaust when properly tuned, which is normally aluminum debris from the engine wearing in.

The motor runs great though, I think the ring, reeds, and sealing made a difference.
Click to expand...

Me too! I'm planning to run about 2 gal of pennzoil aircooled through it then Stihl ultra. So far so good.
 
gyro

gyro

GSN Contributor
Congrats on the successful flights! Enjoy and welcome to the wonderful world of Dino fuel! :D
 
dth7

dth7

3DRCF Regional Ambassador
GYRO said:
Congrats on the successful flights! Enjoy and welcome to the wonderful world of Dino fuel! :D
Click to expand...

Just checking my gas can today. 5 flights avg 10 min each. 1/3 gal used. $1.50 for nearly an hour of fun and some thrilling moments. Awesome.
 
wedoitall

wedoitall

Member
the more I see and read about this plane, the more I like it. Looks like if I build one it would cost about the same as a used 50cc'er. one thing I was looking at was the servos. On a plane this size the servos are pretty much stuck with this size? On a 50cc I could use those in a bigger plane?
 
hone

hone

150cc
It uses standard size servos. So you can use the same servos that are used in the 50cc and bigger planes. I'm using HS-7955s.
 
dth7

dth7

3DRCF Regional Ambassador
hone1er said:
It uses standard size servos. So you can use the same servos that are used in the 50cc and bigger planes. I'm using HS-7955s.
Click to expand...

GHoffman can chime in here but he has the 91" extra and tried the same servo on the wings and he did get blow back on ailerons. Not sure what he went with.
I think a better way to look at it is transport and flying sites. If I had a bigger vehicle or trailer and a bigger flying area I would go with a 50cc. This size gives me the best of both worlds transportability of a 60 and performance and damn close presentation of a 50 cc. The older 50 cc's used to be this size or close to it. My two cents.
Headed to a fun fly tomorrow and managed to squeeze the 78, a 60, 48, 2 EDFs and a 43" foamie I want to sell plus a gas can, batteries, field box a couple chairs, umbrella, camera pack and small cooler all in my Outback. Going to have to inhale to close the door!
Can't wait to fly the 78 more. Hey Hone, where were you balancing it. I'm on the wing tube and it seems slightly tail heavy. I added another batt tray forward to check it out.
 
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