TomCrump

A strong .46 is more than adequate for the LT-40.. Even with it, proper throttle management is a must.

I wouldn't suggest anything larger.

Flight Risk

My Feedback: (1)

If you want to play with an Evolution 10cc or similar, this would be a good plane to do it with. It certainly wouldn't be overpowered. It may take some modification to get the spark unit in. Though you could probably use a smaller tank and get the same run times as glow. And the goo on the plane would be much less.

Jersy Hank

E T I have a 60 size Supra out runner on mine, should run on 6 cells, I run on 3 cell 6600 m a at 35 amps with 15x8 prop. Get 30-40 min. flites. Also this plane is20 years old, fellow that built it passed on, his son gave it to me. The old fellow crashed it many many times, rebuilt it with 1/4 ply door skins to make it crash proof Must be in 12-14 lb. range now. Still a floater! Also no need for ailerons flys great as is. Good Luck Harold.

flyingagin

Kadets are forgiving of wight especially the bigger Kadets.

Ken

flyingagin

Does any one have a guess as to the typical wight of a Kadet JR?
I am guessing about 3 lbs with full size sport servos, nicads and a .25 engine.
Does that sound about in the neighborhood?

I am build new wings for my JR. A standard flat bottomed wing and a symetrical wing. But they are 2 piece wings theat join with spade joiners. I can make joiners to any dihedral I want this way. The joiners are 1/4" maple.

I just made and tested one joiner to 22.5 lbs hanging off the end. If my typical wight estimates of a JR are correct that is a 15g load.

Ken

skylark-flier

Original SIG paperwork says 4.75 lbs

flyingagin

Thanks Dave
Porky little thing ain't it. jeez

Well the test I did on the sample maple joiner today, was to had water to a bucket hanging from the end of the joiner. I added axactly 23.7 lbs to one joiner. There will be two joiners, one each side. So at 4.75 lbs that means I loaded the joiner to 10 G's. I think that is enough.

Hey Dave I am going to link that pic to my build and update my data

Ken

Ken

flyingagin

Oh Hey Dave do you think a 10 G load factor is sufficient? Ya think a JR can actually maneuver that hard if you push it to the limit?

ETpilot

Thanks for the replies ref engine. I will go with my OS .55 on the LT-40. Later I can test out the gas engine on this model or build a low wing sport plane for the gas engine.

skylark-flier

Ken, 10g is just fine for Odo - no problem at all. I should have thought and posted that notice on Odo's thread too. My bad.

Yes, I'm sure the Jr can put her wing to the test but I have serious doubts that she's capable of breaking it unless you put some kind of super-powered engine up front. Then, any plane can break her wings. I just restored/rebuilt/recreated a Goldberg Eaglet this past winter. That plane was originally built with some kind of rather funky ply, measures 3/32" thick, maybe a slight bit less actually. I had to recreate everything forward of the rear wing attachment dowel and rebuild nearly all the rest. New fuse ply is 3/32" birch and she's tough as a tank. She's flying on a .29 and with control deflection of 45 degrees I have detected ZERO stress on the wings. If she can do that, Odo can do that.

What I started with, and ready for flight:

flyingagin

Thanks Dave. I figured you would have a fair idea
Was the "some kind of rather funky ply" luan (door skin and floor underlay ply). I have use it one time for fuse sides on a good size plane. Also for last time. Stuff almost explodes when stressed.

Hey I put a .40 on a JR once. That was rather entertaining. But a ST .34 is just the right amount of overpower. Not to much at all, but a heck of a steep sustained climb rate. Exact replacement mounting width and holes for a Os .25.

Here is Odo's fuse

Ken

spaceworm

I still have an Eaglet 50 NIB from that era. I will get it out of storage and see how "funky" that lite ply is after all these years. My formative years were with an Eagle 63, again from it's era, with a K&B 40. Still have the engine, plane long gone.

Flew to destruction (my fault, not its') a Kadet Jr. with an OS FP 25. Flew great and got me back into RC after a long hiatus.

Have a Kougar NIB, a Sig 1/4 scale J3 flying with a Zenoah G23, a Sig Spacewalker with a Saito FA-130T, and a MK I Kadet, waiting only for a fuse recover. I will fly it with a Saito FA-56. Today has been the first (for me) flyable day since last fall; snow piles finally melted away!!

Bets regards, Richard

Pork Chop

My Feedback: (5)

I had a Tower .46 on my LT-40 and it flew like a banshee! As TomCrump said, throttle management will be a must. I have a AX 55 on my Kaos and It is quite a performer!

gva1956

Here is my Senior Kadet running a power 32 and flys on either a 4s or 3s.

FlyerInOKC

My Feedback: (6)

My LT-40 does fine with a Super Tigre .40 at half throttle.

Dave, your Eaglet reminds me of an old plywood Cub I had back in the mid 70s with an OS .20 or .25 up front. I couldn't tell you who made the kit but I wish I knew. I discovered the new repeater ATT installed with its beam cutting across our old flying field on the maiden flight. A number of planes were loss before the field was abandoned several weeks later. I went into the weeds straight down at full throttle and broke the nose in to about 3 or 4 pieces per side as far back as the instrument panel. Dug the engine out with a tire iron and cleaned it up. The Cub flew with the same engine after the rebuild. OS sure new how to build an engine or I got real lucky one.

TomCrump

Nice Kadet Senior !


I'm getting a second hand Kadet Senior Sport ready to fly. I made some repairs today, and then installed some servos extensions and the servos.

I used natural Solartex to cover the repaired fin. It, and the repaired cowl will be painted white.

Power ? Like you, a 32. Mine will be on 4s.

Pork Chop

My Feedback: (5)

Nice Senior gva1956. Seniors look awesome with transparent covering.

Pork Chop

My Feedback: (5)

I love me OS motors too they are built so well. I have 2 Tower .46 that I wish were still in production they have been very strong and reliable performers. Anyone else have the same experience?

TomCrump

A friend had an LT-40, powered by a Tower .46. The thing was so fast that it developed flutter.

The resulting crash was so spectacular, that it is still be talked about, 4 years later.

acdii

FG-11 wil fly it for an hour.

Hydro Junkie

Richard, it's nice to know the 25FP has enough grunt to fly a Jr as I'm scratch building one from plans and that's what's going into it. I've installed a MA 9X6 on mine. I have decided to change the wing on mine, going with 6" more on the span, no dihedral and three bay wide ailerons. If things go right, I'm looking at putting twin floats on it as well, hence the longer wing

BigTeeEldorado

Howdy Folks, Just checking in and Love to see that the brotherhood is still growing.

I've been working on too many projects around here and only one is aviation related (the scratch built p38 sport using Kadet components) and not getting any of them completed. You all know the story!

Anyway when I read the float comment, I thought I would ask if anyone else out there has run into a ban on float flying in a national park? Our only real location to float fly is in the Lake Mead National Park and it has been banned for some reason leaving us with no float flying spot. (not a lot of water in the desert!) Lots of rumor pointing fingers at quad flyers etc. but irregardless I'm wondering if this might be a local, regional or national ban.

Tony

Flight Risk

My Feedback: (1)

I think there has been a lot of concern about flying in Natl' Parks since the idiot crashed his quad into a hot pot at Yellowstone. But I haven't heard if there's a nationwide ban.

flyingagin

Hydro Junkie, I have always used a OS. 25 BB engine. They have plenty of umph for the job. Flies a JR very well indeed. I think a .19 would fly one OK, just not a lot of umph. I have flown my JR on a ST .34 (exact bolt in). I was flying off of grass and need a little more getty up go. Had to watch out for the torque roll when low and slow. Punch the throttle once like that and never made that mistake again. Dang thing rolled almost 60 degrees and that only @ 6 foot altitude.
I have tried a 40 in the nose, but took that out fast, only one flight with it.

To me a 25 is perfect, and maybe a 34 on floats for a little more get go. Once I put my Odo on floats it will likely get my ST .34
I have not had the chance to work on for a few days, But I think I beat the main hurdle that I had more in my mind than any where else (spade joiner strength). Last hurdle will be joiner pockets.
Hope to start the flat bottom wings next week. Symmetrical wings will be after that.

Ken

skylark-flier

Hey Tony!! I probably have this about half-right, but my info is that RC in all Natl Pks is banned with the exception of a few places that are already established as official RC flying sites. I have Shenandoah Natl Pk on one side of me (4 miles away) and George Washington Natl Forest on the other (9 miles away) - we used to fly sailplanes from Shenandoah but they closed us out last summer for just that reason - the dude that dropped a quad into Yellowstone.