U-2 with Retract, tailwheel, flaps and rudder mods!! - RC Groups
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This thread is privately moderated by tking2097, who may elect to delete unwanted replies.
Feb 19, 2011, 01:05 AM
'Sky' King
tking2097's Avatar

U-2 with Retract, tailwheel, flaps and rudder mods!!

I have always had a weakness for the U-2 Dragon Lady, and once I saw Phase 3 U-2 flight video, I knew I had to have one in my hangar! There was just one problem, the Phase 3 version is a belly-lander. After doing a bit of homework, I developed a Strut kit with double axles to mount in an E-Flite 10 - 15 nose retract, or the NitroPlanes retract for the Phase 3 U-2 kit.

My completed U-2 with the Strut mod and added tailwheel (3/4" Sullivan from LHS) can be seen in the first picture.

In the second picture, you can see the kit parts, the assembled strut assembly, and finally the completed strut with wheels. The strut is made from T-6061 aluminum, and all hardware is stainless steel. As you can see, the kit is simple and easy to assemble!

Wheels - The kit provides for the use of 1.5" or 1.75" sized thin wheels. Due to the rough surface of the field where I typically fly, I chose to install two 1.75" wheels (Dave Brown Products Lite Flite Wheels). Wheels too large to fit the axles appear too large for the U-2 and will not fit in the space inside the fuselage.

Note that the 2 screws used to form the double wheel axles were test fitted with the intended wheels, then assembled using Blue Thread-lock compound. The use of Blue thread-lock provides for a secure capture of the screws, yet allows the screws to be removed at a later time if required.
Since space inside the Phase 3 U-2 is limited, a bit of ingenuity to get everything to fit. For example, I chose to mount the ESC on the bottom of the fuselage, just ahead of the fan, in order to free up space for the retract, retract servo, and an optional rudder servo.

I made up a couple of extra retract kits while I was at it. Feel free to contact me about obtaining one for your U-2 project if you like.

The U-2 with added flaps, rudder and retractable nose gear is ready! All that is needed now is some good weather for a maiden flight plan!!
Last edited by tking2097; Feb 24, 2011 at 10:30 AM. Reason: edit caption.
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Feb 01, 2012, 12:28 PM
Apprentice 15e

Just ordered Phase-3 U2

I just barely made it under the wire at hobby people's Jan sale... the U2's were on big time sale.. RTF $144, and I-bind for $124. I called them to check if they will have RTF in stock, by the time I was on the phone, the price for I-bind went from $124 to original $199!! But the person at Hobby People, still gave me for $124!!

I hear they're going to discontinue RTF version of Phase-3 U2!

BTW, I am already considering variety of mods, as you have done. And your page provides exact info, I need!

Thanks for taking time to post this.
May 22, 2012, 05:01 PM
Registered User
Alpha10's Avatar
I'd love to get more info on your rudder mod. It would be great to have on this plane for more scale turns/landings.
May 31, 2012, 08:14 PM
SAC-17th Bombardment Wing (H)
Bigbear001's Avatar

U-2 on its Way


I was looking for another EDF glider to replace my Syncro that is now 75 feet up in a pine tree :-( I have constructed a potato cannon and will try to get some of the electronics back, enough about that! Do you have a list of items/material/parts that you used to make the retracts, flaps and rudder for the U-2. I would like to do the same with mine when I get it in a few days. If you have items for sale I might go that route but like to tinker.

I also do only electric warbirds and gliders. Have/had a Great Planes Syncro EDF, a Electric Senorita, working on a Royal P-38 kit that will have 1500 w motors and gathering material to make my version of a B-52.

Would like to hear about the parts. Also, what ESC and batteries have you used in your U-2?


Jun 10, 2015, 04:38 PM
Registered User
Just joined, about two days ago, and I have an U-2 on its way. I got it from Amazon. I plan on doing the same mods I see on this site, but a little more. I am going to install carbon fiber (6mm flat) in the body area, wings and uprights. I have done this to my other plans I have. If there any more additional images with detailed instructions I would love to get hold of them. Great flying...

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