The Intern 66 is our first entry into larger E-models. Under development for some time. Years of teaching experience was used to evolve the traditional trainer beyond yesterday's standards. As one of my clubs instructors for over a decade, I've developed a real joy for teaching RC and a good knowledge of what works best. Additionally, one of my favorite forms of flying is to take a trainer and thoroughly wring it out showing how exciting and aerobatic this kind of model can be. For the Intern 66 project, I wanted the perfect trainer that was also capable of outpacing any trainer I ever flew in the aerobatic department. This kit is the successful result of our efforts to arrive at such a goal.
Power me with any Power system in the 300 to 700 watt range turning 10-13" props and pitch speeds at 60mph or less.
The "US Army" model pictured foreground is setup 5 degree dihedral with GWS outrunner #007, 983 KV, 3S 3200 pack and weighs 3.33lbs. (52oz). Any of the props below would be good depending on the power level you seek. This model feels like a perfect trainer in flight (except I have my throws a little higher than you'd use for instructing) and is capable of barnstorming aerobatics enough to satisfy anybody. In fact, it will just hold a knife edge with minimal mixing. I fly it currently with a 12-8 APC-E prop and it has unlimited vertical early in the pack. However, I like it best for it's reasonably powerful yet "on the wing" aerobatic capability. She is really sweet! For a student, use this setup with 11-5.5 or 11-7 until they are ready to handle more power. The power "IS" in the prop you know. For styling, I couldn't help myself, the tundra tire look just seems to really set off this decal set.
The Navy Trainer shown background is setup 1 degree dihedral, GWS 008 Outrunner 842 KV, 4S 3000 pack. Weight 3.5lbs (56oz.). This is my brutal stump pulling setup. I fly it currently with a 12-6 prop. As you might imagine from the spec's below it's near pattern like, only slightly heavier and vertical is no problem here. More power than I was originally planning for this kit. We put it together to test the lower dihedral and a power system that I thought nobody would ever want to exceed. Note, with 1 degree dihedral, yaw is pure like a pattern ship, Ailerons must be employed to execute a roll or turn. This is truly brute powerful and outside of where I think most people will like this model best, however I present it here for your consideration along with all probable props you might use here.
(Note pitch speeds higher than 54mph are NOT reccomended, this is a "tractor", not a "racer".) Over time, consumers have been slowly trained to accept heavier and heavier trainers in the ho-hum 40 size ARF trainer market. The normal range is 5lbs (for a light weight one) and 7lbs near the top of the range with 5.5 t0 6 lbs being more normal. Our Intern 66 smashes today's bloated trainers and sets a new weight standard far superior to even yesterdays finest hand built kits. I've often helped modelers trying to convert 40 size models with 3S power systems. This is usually a big error because the watts per pound you need to get good performance is nearly impossible to obtain in most cases. Here the model is so exceptionally low in weight that you can easily make the "common mistake" a super successful combination here. Never fear, even my lowest wattage setup above will outperform the average glow trainer. I've not listed any slouch setups here.
I am confident in saying this is probably the lightest weight 40 size trainer ever kitted and offered for sale in the history of our sport. It's so light weight perhaps using the word "probably" is being way too cautious but I wish not to offend any excellent accomplishments unknown to me. All in all I feel this is some of the best work I have ever done. You'll really enjoy this build and you'll have a unique and extra special model as a reward.
The Sig Kadet LT-40 has become the R/C trainer of choice at many club fields. Not long after it's introduction, we started getting requests for a smaller version of the same airplane. So here it is - a compact version of the LT-40 - the new Sig Kadet LT-25. When price shopping this kit, be sure you understand our super low flat rate shipping means total cost to your door is probably the lowest on the planet.
"The R/C Trainer That's All Laser Cut", As you would expect, the new LT-25 inherits all the same gentle flying characteristics of the other legendary Sig Kadets. It has the same light wing loading, which allows it to fly slow enough to give the student pilot time to think and react. It has the same "hands off" stability on all axis. If the student pilot gets disorientated, simply let go of the sticks and the LT-25 will recover and return to level flight within seconds.
Wingspan 63 in 1600 mm Wing Area 724 sq in / 46.71 sq dm Weight 4 - 4 1/4 lb 1814 - 1928g Wing Loading 12 - 13 oz/sq.ft. 3662 - 3967 g/sq-m Radio Required 4-Channel Recommended Engines .25 - .32 cubic in (4.1 - 5.2 cubic cm) 2-Stroke .20 - .26 cubic in (3.3 - 4.3 cubic cm) 4-stroke
Special notes about electric from Dave: This model makes an excellent electric conversion and is perhaps the most popular one of all time. Super light weight, large as or even larger than most 40 size trainers. The only lighter weight 40 size trainer on the market is the Radical RC Intern 66.
Setup and Performance Chart
Pitch Speed MPH
Est. Top Speed
Estimates based on manufacturers provided constants using E-Calc. High Quality 2100-3000mah used as trial cell in calculations. Presumed model weight of 76oz. @3 cells (added oz for higher cell counts). Actual performance may vary depending on components used, accuracy of data as provided by manufacturer, quality of battery, ESC, and many other factors.
SKU Number: SIGRC74
NASA wants to go back to the moon. Radical RC's Wicked Wing beat them to it! Check out our original designs! Radical RC Verti-Go 125, Verti-Go 3D, E-Hornet, Mini Stick, Micro Stick, Micro Bipe, Micro Low Stick, Quick Wing 12mm, Quick Wing 20mm, Quick Wing Twin 20mm Double Trouble, Das Mini Low Stick, Das Mini Bipe, Mini Hunter, Mini Intern Trainer, Stick 600,
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Pictured to left is one of Garrett's competition ships, to right .... Dave, Here is a picture of my second plane. This is a 3W Extra 330 40%. The plane is flying great. Thanks so much for all your support in this hobby. I really like using your products. My friends as well are very happy with the equipment & fast-friendly service that is coming out of your company. Let's keep in touch. -Garrett Morrison