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Old Apr 05, 2011, 10:10 PM
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Dynam T-28 Trojan

Welcome to the Dynam T-28 Trojan warbird thread! This is a place to discuss all things about this plane including initial setup, modifications, known issues/fixes, and our product experiences (good or bad). I will try to keep this as up to date as I can going forward, so if you would like me to add anything just send me a PM and I will add it to this page.

General Information

Stock Specifications
  • Wingspan 1270mm
  • Fuselage length 1000mm
  • Wing loading 50g/dm2
  • Flying weight 1350g
  • Servo 9g4 (x6 with flaps)
  • Battery 11.1V 2200mAh 20C Li-Po
  • ESC 30A
  • Motor KV850
  • Prop 11x7x3

Dynam T-28 Website Links

Red Version - http://dynam-rc.cn/Products_view_9.html

Grey Version - http://dynam-rc.cn/Products_view_108.html

Owner's Manual Part #1 - http://dynam-rc.cn/uploadfiles/dlm/DY8940-manual-01.pdf

Owner's Manual Part #2 - http://dynam-rc.cn/uploadfiles/dlm/DY8940-manual-02.pdf

Stock Motor - http://dynam-rc.cn/Products_view_120.html

Stock 30A ESC - http://dynam-rc.cn/Products_view_48.html

Stock Prop - http://dynam-rc.cn/Products_view_99.html

Stock Servo - http://dynam-rc.cn/Products_view_36.html

Nose Retract Landing Gear - http://dynam-rc.cn/Products_view_57.html

Main Retract Landing Gear - http://dynam-rc.cn/Products_view_107.html

Other Related T-28 Web Links

The Real "710 T-28 Trojan" or "Fennec" - http://www.rcgroups.com/forums/showp...postcount=7288

Commonly Asked Questions

1.) How do I hook up the LED lights?
Answer - The supplied LED lights are disappointingly dim. It is recommended to replace the LED's with aftermarket ones either hook them up with required resistors to a power source or better yet, to get an aftermarket lighting kit (see links further below).

2.) What size of battery can I fit in this plane? Answer - Although the recommended 2200mah battery is fine, consensus is that a 3000 to 3300mah (3s or 4s) battery is a good balance between flight time and weight. Beyond 4000mah is pushing it.

3.) Why aren't my retracts working? Answer - these retracts can sometimes hang due to poor servo plug connectors or kinked wire connections. Another common issue is that the retracts don't like the cold weather. When the temps drop below 40-45 degrees F, they stop working.

4.) Are there any weak links with this plane? Answer - the nose gear is prone to bending on hard landings and even over time on good landings. Many of users in this thread are either adding an aftermarket oleo strut to the landing gear stem, replacing the landing gear stem with a similar sized motor shaft, replacing the entire landing stem with an aftermarket spring stem (Dubro 1/2A), or replacing the entire nose retract/landing gear assembly with an aftermarket unit.

5.) The plane doesn't seem to have much power, is this normal? On a 3s battery with stock power system/prop, it is lacking power. To increase performance on 3s, it is recommended to replace the prop with a two blade MAS 12x6 prop or an APC 12x8 prop. This will give you a nice increase in performance while not having to change anything else. On a 4s battery, it is required to replace the ESC with a 40A or higher continuous rated unit. The stock prop works well on a 4s battery, but the MAS 11x7x3 and MAS 11x8x3 are also user favorites.

6.) What is the supplied glue and should I use it? Answer - the supplied bigger white tubes are rubber cement and the smaller tube is canopy glue. You can use them as required in the directions, but you can also use epoxy, gorilla glue, etc to ensure more holding power.

7.) I want to add flaps, what do I need? Answer - Two 9g servos, two linkage quick connects, servo Y-adapter (if only using 1 channel), and servo extensions as required to reach your receiver. One of the servos will need to be reversed. You can reverse the servo yourself by cracking open the servo and reversing the leads on the motor and the pots, install a servo reverser, or plug the flap servos into separate receiver channels and reverse accordingly. See links below for flap

8.) My plane wants to balloon when power is applied, how do I fix this? Answer - the thrust angle is commonly not enough on this model. By simply adding small 3mm washers to the back of the motor mount or between the mount and the motor, you can increase the thrust angle which should be slightly down and towards the right wing. A good example of this performed along with an illustration from the real plane can be found here... http://www.rcgroups.com/forums/showp...postcount=6169

9.) Is cooling an issue with this plane? Answer - it is generally recommended to add some vent holes to the front cowling and also an exit hole towards the bottom rear of the plane. If you do a search within the thread for just the attachments, there are many good examples (pictures) that can be located for illustration.

10.) Where should I place the battery and receiver? Answer - refer to post #140 http://www.rcgroups.com/forums/showp...&postcount=140

11.) How can a prevent my canopy ejecting during flight? Answer - add a latching mechanism or more rare earth magnets.

12.) How do I access the motor and ESC? Answer - remove the prop and simply pull the cowl off (held on by magnets) to access the motor. To access the ESC, remove the 4 screws that hold the motor mount to the firewall and simply pull the motor/mount and ESC out together.

13.) My landing gear mains droop when retracted. How can I keep them tight on the wheel wells? Answer - Add some magnets to hold them in place (cobieg) - http://www.rcgroups.com/forums/showp...postcount=6735


Thread Links and Popular Add on Products

Build Videos (jim12) - http://www.rcgroups.com/forums/showp...postcount=3618

Nose Gear Oleo Strut Mod (spyro37) - http://www.rcgroups.com/forums/showp...postcount=1672

Flap Mod Video (jim12) - http://www.rcgroups.com/forums/showp...postcount=1351

Flap Mod Pictures (kman24) - http://www.rcgroups.com/forums/showp...&postcount=403

Popular Servo Regulator for Reversing and Controlling the Speed of Flap Servos - http://www.hobbyking.com/hobbyking/s...Regulator.html

How To Reverse a Servo for Flaps (cheap way) - http://www.rcgroups.com/forums/showp...&postcount=321

Popular Lighting Kit - http://hobbyking.com/hobbyking/store...ng_System.html (Please note that you will need some extension wires to extend the lights to the absolute tips of the wings). Here is another source for the same kit under different brand/package - http://www.hobbypartz.com/41p-flight-led-system.html Here is a picture of the kit installed - http://static.rcgroups.net/forums/at...0-IMAG0370.jpg

Alternative Retracts that Work in Colder Conditions and with Airtronic Radios (rrobbins) - http://www.rcgroups.com/forums/showp...postcount=1307

http://www.hobbypartz.com/pz-15090-retract.html

Fuselage Replacement/Turnigy Retracts Install (SweetieinSF) - http://www.rcgroups.com/forums/showp...postcount=6091

Custom Nose Gear Door (Grantham Kid) - video http://www.rcgroups.com/forums/showp...postcount=8218 and pics http://www.rcgroups.com/forums/showp...postcount=8230

Micro Switch for Landing Lights (Fei Hu) - http://www.rcgroups.com/forums/showp...postcount=4797

More to come...

KMan
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Last edited by kman24; Sep 16, 2014 at 12:08 PM. Reason: updates
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Old Apr 05, 2011, 10:31 PM
Checking CG is for NERDS!
Smokescreen38's Avatar
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Looks pretty good..but is "Dynam" Chinese for "Parkzone?"
First the Meteor/Habu....now this!

Apparently the quality is decent though.
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Old Apr 05, 2011, 10:39 PM
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I just got Dynams C-47 Skytrain or as they call it the Skystrain lol. Good looking kit. It goes together fast and simple. And if this Trojan is made out of EPO it should be sturdy too.
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Old Apr 05, 2011, 10:45 PM
Checking CG is for NERDS!
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Skystrain?! Too funny!
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Old Apr 05, 2011, 10:57 PM
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Up until a year or so ago, all of Dynams products seemed a little "off". But, they have really come around with their recent products. I bought their SR-22 plane back in December and have been impressed with it so far. Yeah, they do lack some originality, but they do have some nice touches like their flap systems.
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Old Apr 06, 2011, 12:08 AM
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Looks like Nitroplanes is going to start stocking the Dynam P-51 soon.

http://www.rcgroups.com/forums/showt...ght=dynam+p+51

Hopefully, this the T-28 follows soon after and they offer it in an ARF version. I am surprised that they didn't offer this plane first since there are only a bajillion Mustangs out there
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Old Apr 06, 2011, 05:00 AM
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Looks pretty good.
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Old Apr 25, 2011, 11:10 PM
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Doesn't look as nice and detailed as the Airfield/FMS T-28 that just got released, but I am sure it will be priced accordingly. Looks like in this video that it comes with the retracts, too

New Dynam 1200mm T-28 Flight Preview (2 min 11 sec)
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Old Apr 26, 2011, 11:30 AM
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Looks like Dynam is trying to keep up with Airfield/FMS
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Last edited by Melnic; Sep 29, 2011 at 09:43 AM.
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Old Apr 27, 2011, 12:30 AM
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I'd say they are doing a pretty good job of it too. I have my Dynam C-47 almost complete. I just need to have cooperative weather to do my taxi tests before I close up the tail. Having totaled my Parkzone T-28 I wouldn't mind replacing it with either this Trojan or the P51, or Cessna 310. Man I'm starting to be a convert from the wonderful world of Horizon Hobby. I can't wait to fly my Airfield F-16 and Skytrain. Bring on the sunshine and clear skies I want to fly!
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Old Apr 27, 2011, 07:55 AM
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We just ordered our first stock of the Trojan from Dynam.. Both colors and will come with all the servos installed except the flap servo (we will supply that in the box) and the electronic Retracts installed.. All you need to add is your rx and battery.. The mustang is next..

Rob
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Old Apr 27, 2011, 08:52 AM
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Quote:
Originally Posted by rorrock View Post
We just ordered our first stock of the Trojan from Dynam.. Both colors and will come with all the servos installed except the flap servo (we will supply that in the box) and the electronic Retracts installed.. All you need to add is your rx and battery.. The mustang is next..

Rob
So, the electric retracts don't come with this plane from the factory? They have to be purchased separately and installed?

TIA - KMan
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Old Apr 27, 2011, 08:56 AM
Rc Fan From Belgium
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I will go for the fms / airfield trojan then as it comes fully equipped.
Might be a tad more expensive but its a better looking plane anyway then the one from Dynam.
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Old Apr 27, 2011, 03:08 PM
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Kman,
They are coming installed at the factory..

Rob
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Old Apr 27, 2011, 07:39 PM
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Quote:
Originally Posted by rorrock View Post
Kman,
They are coming installed at the factory..

Rob
Cool, thanks for the clarification

KMan
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