RCU Forums - View Single Post - Building a Dynaflite Super Decathlon
View Single Post
Old 05-03-2009 | 12:54 AM
  #787  
dumorian
Senior Member
My Feedback: (6)
 
Joined: May 2008
Posts: 482
Likes: 0
Received 0 Likes on 0 Posts
From: Goshen, VA
Default RE: Building a Dynaflite Super Decathlon

All! I got it in the air! And it came home in 5 pieces! 1 fuse, 2 wings and 2 struts!

Today, we started the engine for my first time... it was a used but checked about Brillelli 36cc. It took just a bit of carb adjustment to get it running, but not bad at all. No gas leaks, so that was good. I let it run a nice long time and worked the throttle from time to time just to be certain it was going to be reliable. Not a single blip out of it. Sweet!

I set up some expo as I haven't yet set dual rates, only high rates which are pretty close to max throws and a little over factory specs for the ailerons... but rudder and elevators are pretty close. The ground handling is not the best I've had but not the worst. I only did a bit of ground work and then got in two flights, so I still have some experimentation to do to see what works the best. I do know my tailwheel spring is a bit light for this model... perhaps a bit more might make it more docile. Our grass was mowed a week ago and it was already getting a bit tall. I'm sure that didn't help much either.

Anyway, it seems to have really good power. It handles pretty darned good. I can see that knife edge is going to be easy as an aileron turn pretty much puts it into a knife edge mode. It was a bit late in the afternoon before I got it airborne and it was very cloudy, therefore dim, so I didn't want to tempt losing orientation... I only did a couple of rolls and one very quick stall rudder turn, both of which were very impressive for such a large plane.

My first landing was pretty hot coming in as I didn't know the stall speed. My second landing was still a bit hot but a very nice landing. Still got a floating easy bounce though. I played with flaps up high. They hold promise! I need to mix in some down elevator. But it really putts along up there with full flaps. I never found stall speed as I really didn't want to be dealing with that yet and on such a dark day.

Actually, I'm just extremely relieved to have it home and ready for it's next outing. Perhaps tomorrow if the weatherman will co-operate?

What none of you likely know is that I had a bad transmitter module... it was just weak. I totaled three planes in the process of figuring this out. One Senior Telemaster, one quarter scale Katana and one EF Yak 54 74. So it was like every time I put up a big model... and as I have done almost exclusively electrics... this is my first successful flight of a fuel burner! It's been since last November thinking about this. The hours into the project and I have been getting more apprehensive as this day approached. Finally, appropriately on Kentucky Derby day I managed to get back on my horse and ride it!

I still have a few items to complete. Wheel pants, Ignition and SmartFly switches, Flying wires, and a couple more stickers. A bit more radio programming/tuning. Mostly I just need to get in flights to learn what this bird is capable of.

I have noticed it likes rudder. Aileron turns wind up almost automatically in a KE. I haven't set up any aileron diff. Rudder turns are very flat in comparison. Rolls are a bit of a spiral. Some rudder and perhaps elevator input during a roll might be in order. Otherwise, it wasn't really hard to fly. Mostly I was just entirely too nervous and overly cautious.

Yes! If you can't tell I'm pretty darned excited.

Here's some photos at the field today.
Attached Thumbnails Click image for larger version

Name:	Hf99371.jpg
Views:	100
Size:	99.1 KB
ID:	1191016   Click image for larger version

Name:	Ws56859.jpg
Views:	90
Size:	101.0 KB
ID:	1191017   Click image for larger version

Name:	Dj11730.jpg
Views:	105
Size:	66.8 KB
ID:	1191018   Click image for larger version

Name:	Qj20018.jpg
Views:	93
Size:	30.8 KB
ID:	1191019   Click image for larger version

Name:	Al70558.jpg
Views:	86
Size:	94.0 KB
ID:	1191020