Flight Risk

My Feedback: (1)

One thing you need to watch on an LT40 or most any plane, is if you convert a rubber band on wing to a bolt on, the attachment areas especially needs to be beefed up. I had bought a plane from someone who had converted it to bolt on wing, and after landing noticed the only thing holding the wing on in the rear was the covering. I'm sure if I had flown it another minute it would have landed as a pile of sticks. I've since pulled the covering back and beefed it up good.

acdii

Mine was built from the start as a bolt down. the front uses dual pins anchored to the leading edge with 1/4 plywood and lots of epoxy. The F3 is beefed up a lot to handle the force of the wing lift.

acdii

This is with the tail level.

soarrich

My Feedback: (98)

You would be happier with a electric motor.

Flight Risk

My Feedback: (1)

I agree that a electric motor would make more practical sense, but it's also fun to be impractical and make some greasy smoke and noise.
However, I'm wondering is a power 25 motor refers to the size of electric motor.

acdii

Power 25 is about the size used on a Kadet LT25. The Eflite power series are equivalent to 2 strokes of same displacement. So a .25 2 stroke glow is about the same as a Power 25. Building one with my daughter with a power 25 setup with 40 amp ESC.

soarrich

My Feedback: (98)

I think you're right, he seems to be referring to an electrical setup. I had just seen a glider with a greasy in the nose and that image was stuck in my mine. I was a sailplane purist for a long time, but now I only want one with a electric motor. I have two winches that I haven't used in years free to anyone that wants to come pick them up.

SrTelemaster150

When they start powering large aircraft with electric motors I might try a scale version powered by electrons. To me flying electric is like kissing a girl through a screen door. It just ain't the same.

The sound of a 4-stoke is the best part of the experience. It's a whole lot simpler in the long run. Gas it up, turn on the switch & flip the prop. I can fly all day if I have the fuel.
https://www.youtube.com/watch?v=xE8Y3dYSb1w

acdii

I feel the same way, however, certain planes are perfect candidates for electric. The Twin Otter is a Turboprop, so putting twin Power 25 electric in it gave the plane a realistic sound as it flew by. Anything in RL that is turbine powered would be good scale electric planes.

TomCrump

The Kadet Senior Sport and the Rascal 72 E/G both fly exceedingly well on electric power

My Kadet Senior Sport, with a Power 52 on 4 S, flies similarly to my old, 91 4 stroke powered version.

While I still prefer glow/gas, I have to admit that the ease and convenience of electric power has a strong attraction.

acdii

At least with Poppers, you know when the engine is running. Too easy to get too low and dead stick without knowing it with electric. The other thing I am leery about is the instant on feature of electrics. You must have a hold switch programmed and remember to use it. Other than that, it is a lot cleaner at the end of flying. I finally got an ammo can to store my Lipos in , especially the big 8000 mah monsters for my Twin Otter.


On another note, my Biper Cub is looking more like a Biplane now than a Cub, finished the wing struts, well, got them built and glued, still have to shape them and trim the aluminum brackets.

bobsrc

You need a 10-6, 10-7, or 10-8 three blade. The landing gear on the Extra arfs made in the last couple of years have more clearance than the earlier versions.

trainermaster80

My Feedback: (5)

ACDII HELLO! thanks for the photo's of the extra. later landing gear larger than early extra lg answeres my question. b' building the wing on my dynaflite super decathlon now.
since i liked the extra i may look at another in 2015. thanks
TRAINERMASTER80

FlyerInOKC

My Feedback: (6)

Acdii, nice looking Bipe!!!

skylark-flier

It certainly IS looking good. I, for one, am looking forward to a flight report.

Pork Chop

My Feedback: (5)

Sorry for any confusion and lack of info guys, yes the power 25 is an Eflight motor!

bobsrc

Yes the whole video was done at Sig Mfg. The airplane being built is one of the prototypes of the Four Star 20 and those are my hands doing the building. Bob Nelson #97

acdii

A bit bummed. landed my SE wrong yesterday. That damned )S 70 quit at the top of a loop again at half tank, and it was downwind of the runway, not enough speed to make it back with a line of trees in the way, so rather than go through the trees I let the wind push it behind the trees, where I lost sight of it. Landed on its nose and broke the prop along with the left of the fuse and bent the wing tube. Going to find me a Saito 62(or whatever it is this size) and replace the OS. SInce I have to replace the FW, makes it easy to swap out engines with a new mount. Also gives me a chance to fuel proof the inside better.

I was a bit surprised when I saw the plane sitting on it gear intact, and thought, wow nice landing, only to find the prop busted and the hole in the ground 3 feet away, then saw the wings splayed out. It WILL fly again! If I knew what is causing the OS to quit at half tank inverted, I would have had it ready to fly already.

TomCrump

Most likely, it's a tank position problem.

Where is the tank mounted in relationship to the carb ?

I ran my OS .70 Surpass inverted, upright, and side mounted with no problems. This is what leads me to believe that something else is going on.

acdii

I had posted another thread to get specific on the issue and got the answer. With the tank sitting so low, inch and quarter below the spray bar, and have it run good, it is overly rich when inverted, so the engine floods and flames out from too much fuel. When the tank is full it doesnt affect it as much, but when it drops to half tank, thats when it affects it.

Going to get a Saito 62B for it provided the spraybar is lower than the 70, if so, then it will have all the power I need and want. This plane is a blast to fly, I scared myself yesterday doing a high speed pass, I got a little too close, about 10 feet in front of me and realized just how fast this plane is. I also did a very nice harrier landing with it, and all at low rates. With the smaller lighter engine I wont have any problems with hovering or knife edges either, the OS is too heavy to do either of those, it pulls the nose around.

spaceworm

[QUOTE=acdii;12099415]...
Going to get a Saito 62B for it provided the spraybar is lower than the 70, ...QUOTE]

Well as I said I would, I measured my FA-56. The dimension from the mounting surface of the lugs to the center of the needle valve/spray bar is....wait for it.... here it comes............drum roll...: 0.875 inches. You would think it would be metric, but my English machinists scale does not speak metric. So, convert it if you wish.

My go-to source for Saito data is: http://saito-engines.info/index.html, but even that source does not have the mount to spray bar C/L dim.

Good luck.

Sincerely, Richard

acdii

[QUOTE=spaceworm;12100026]TYVM! That works fine for me, only reason I used metric is for a more precise measurement quickly. My ruler has the metric side on the bottom which made reading the inch side difficult. I can dig out my calipers to check your reading to the OS now.

Volcanxxx

Sig lt25, ultimate profile, astro hog, hog bipe

Volcanxxx

Lt25, astrohog, ultimate profile bipe, hogbipe

spaceworm

Sincerely, RichardKadet Brotherhood #96; Mk 1 Kadet, Kadet Junior,
Kougar, 1/4 Cub, 1/4 Spacewalker II