Dynam C-188

[Iowa54]

RE: Dynam C-188

Just put this one together and looking forward to giving her a maiden flight. The flaps worked correctly but, had to adjust most of the control rods. Has anyone put, snow skies on one of these? Might be the only way I'll get this one in the air for awhile..
:D

[Flygirl]

RE: Dynam C-188

I haven't but I'd bet a pair of Dubro skis would work fine! What are you using as a battery Iowa? I used the Admiral 2500 which gave me a perfect CG for flying. Like you, I had to adjust the rods as well as one of the servo horns on the right hand flap. That was way way off. Good luck on the maiden!

[Iowa54]

RE: Dynam C-188

I haven't but I'd bet a pair of Dubro skis would work fine! What are you using as a battery Iowa? I used the Admiral 2500 which gave me a perfect CG for flying. Like you, I had to adjust the rods as well as one of the servo horns on the right hand flap. That was way way off. Good luck on the maiden!

We must have had the same assemblers.... I have several of the 4s 2200 (Admiral) Be a good start between the C-166 and the Waco

[Iowa54]

RE: Dynam C-188

Maidened my C-188 today and it flies great, I didn't have any flaps due to the Y harness not working but, they really weren't needed but, would have been nice to try out. landing will take some practice cause its a floater. With the Pandora I would start backing off the throttle 8-10 ft off the ground and it would land usually fairly close to me but, this one went by me still about 5-6ft off the ground. 4s 2200 all the way in and the CG was perfect.
Temp was about 30 degrees with a 5-8mph wind and it didn't seem to even notice the wind unlike my hands !!
if the weather holds I hope to get out again tomorrow!

[Hippie 64]

RE: Dynam C-188

That's fantastic Iowa !!!! I really enjoy mine.

I know what I said about flaps on most Dynams but I will tell you what I found on mine . It came with 2 y-harnesses , 1 is just a regular harness . The other is a reversing harness . Can't tell the differences in them but they are different .  1 of them will work your flaps , Dynam started adding that y-harness but didn't mark it . It is there , I know you have finished and flying but I wanted to pass that on to you . Great news on your maiden and keep us up on what you find ..



Bryan

[Iowa54]

RE: Dynam C-188

That's fantastic Iowa !!!! I really enjoy mine.

I know what I said about flaps on most Dynams but I will tell you what I found on mine . It came with 2 y-harnesses , 1 is just a regular harness . The other is a reversing harness . Can't tell the differences in them but they are different .  1 of them will work your flaps , Dynam started adding that y-harness but didn't mark it . It is there , I know you have finished and flying but I wanted to pass that on to you . Great news on your maiden and keep us up on what you find ..



Bryan

Actually they did work but, in messing around trying to get things set up one of the pins in the Y harness pulled out and is still in the receiver. Got a long winter coming up to get it fixed.....Thinking about trying it out with
a set of ski's Might be fun....

[Flygirl]

RE: Dynam C-188

Maidened  my C-188  today and it flies great,  I didn't have any flaps due to the Y harness not working  but, they really weren't needed but, would have been nice to try out.   landing will take some practice cause its a floater.  With the Pandora I would start backing off the throttle 8-10 ft off the ground and it would land usually  fairly close to me but, this one went by me still about 5-6ft off the ground.  4s 2200 all the way in and the CG was perfect.
Temp was about 30 degrees with a 5-8mph wind  and it didn't seem to even notice the wind unlike my hands !!
if the weather holds  I hope to get out again tomorrow!

Yippeee!!!!! Glad it went so well!!!!!!!!!!!!

[Iowa54]

RE: Dynam C-188

Motion had a Blue C-188 in the scratch and dent section with the rear wheel turning free. I picked it up and I think its going to be my ski tester. Sounds fun......Shouldn't be to bad to fix if needed. I bet they snapped the control rod off inside the fuselage.

[Flygirl]

RE: Dynam C-188

Motion had a Blue C-188 in the scratch and dent section with the rear wheel turning free.    I picked it up and I think its going to be my ski tester.   Sounds fun......Shouldn't be to bad to fix if needed.  I bet they snapped the control rod off inside the fuselage.

I bet you're right.... :-) Let me know how those skis do okay?? Kinda interested. :)

[Iowa54]

RE: Dynam C-188

[qquote]

I bet you're right.... :-) Let me know how those skis do okay?? Kinda interested. :)
[/quote]

The Blue C-188 from the scratch and dent list came today. Gave it a quick look and from what I can tell its all there but, missing both Y harnesses.
I know they are different but, don't see what ones to order. I contacted Motion and see what they have to say.

[Flygirl]

RE: Dynam C-188

[qquote]

I bet you're right.... :-) Let me know how those skis do okay?? Kinda interested. :)

The Blue C-188  from the scratch and dent list came today.  Gave it a quick look and from what I can tell its all there but, missing both Y harnesses.
 I know they are different  but, don't see what ones to order.  I contacted Motion and see what they have to say.
[/quote]

They will get ya fixed up.... I was missing one also but had one in my tool box of stuff.

[Iowa54]

RE: Dynam C-188

]

They will get ya fixed up.... I was missing one also but had one in my tool box of stuff.
[/quote]

They contacted me back and gave me a part # but, didn't say if both will work for flap and ailerons.
I have one from another plane but I don't think it worked for flaps when I tried it out before. Works for ailerons though..

[Flygirl]

RE: Dynam C-188

Saw this on the description of the plane....

"TECH NOTE: The C-188 comes with two 9g servos pre-installed for the flaps. On some models Dynam has installed two normal direction servos instead of one normal and one reverse. Test your flaps before flight, if your flaps move in the same direction everything is fine and no further action is required. If your flaps move in opposite directions (like ailerons) you will need to do one of the following: 1) replace one flap servo with a reverse 9g servo, 2) mechanically reverse one of the servos (requires soldering) or 3) use a servo reversing cable on one of the servos."

I might have had one with a reversed servo so it didn't matter on mine?
[hr]
Found this on RCGroups as well....

LNLP, sorry for the long winded explanation to follow, but it is the only way I can convey a proper reply to your questions.

Yes, the wire harness came attached to the elevator & rudder servo leads on mine as well, probably all come that way. Just remove it from the elevator and rudder and hook it up your aileron connectors. Plug the other end of the harness into the aileron channel of your receiver, You may need a short extension to make it reach without much pulling and tugging. I used a 6" extension in my case.

As Gabe has stated, separate channels for each flap is preferable, not only because you can reverse the travel direction of one of them, but because you can also center and match the travel of both servos as close to the other as humanly possible.

If you must use a Y harness on the flaps, a stand alone servo reverser will be needed. Although there have been issues with some "amplified" servo reversers and Spektrum radio gear (JR included) in the past, you can buy the EXPERT brand servo reverser sold by Horizon Hobby and its dealers. It comes with a "pot" so that one of the two servos can have its performance "matched" to its mate, and it is not amplified. http://www.horizonhobby.com/products...ard-EXRA320#t1

Heads Up RC also sells a servo reverser that has worked well with Spektrum radios since it is not amplified. It is reasonably priced as well. http://www.headsuphobby.com/Redcon-S...rser-H-145.htm

Then there is the Turnigy servo reverser sold by Hobby King from their US Warehouse, by far the lowest priced of the three reversers. I have used them in the past, but have never used them with other than Futaba and Hitec radio gear. The Turnigy reverser is not amplified either. http://www.hobbyking.com/hobbyking/s...arehouse_.html
qban_flyer is offline Find More Posts by qban_flyer

[Iowa54]

RE: Dynam C-188

Thanks for the reply, I might just take the one out of my Orange one just to see what I need. I do have a 9g reverse servo that a friend gave me awhile back if I need it. Good news was the rear wheel problem was an easy fix. The control rod was out of the horn. Took longer to cut the hole than to fix it.

[Wisconsin John]

RE: Dynam C-188

Well, after doing some more research on line, it appears that the instructions and the other sources I was using are both correct. I know that most CG measurements are taken where the wing meets the fuselage (wing root), but the instructions with the plane show a start point on line with the center of the landing gear. Curious.. However, if I take 90mm from the wing root at the fuse, the CG would go back approximately to where the servo wire channel is cut into the wing. If I use the 65mm as show on the MRC website, again from the wing root area, I come to a spot about 25mm back from what I was calling the "main leading edge" of the wing. The answer is that as long as the plane balances within that range, it should be fine, and using a 2600mAH 4 cell battery, that is exactly what I have, closer to the 65mm measurement than the 90mm measurement, which should be good for the maiden flight.

Now, if only I could figure how to get the flaps to work correctly, without using a servo reverser. I plugged one lead into the Aux port on my 6 channel receiver, the other flap lead is plugged into the port marked for gear. (Specktrum rx). I have tried reversing the channel to make the one servo work with the other, but so far no luck. I will obviously have to read further in my DX9 manual to figure this out. Or, I could just cheat and use the servo reverser I have.  I just wanted to try this separate channel method to see if I could do it. I did set up the programming for the wing as 1 aileron, and 2 flaps, so it should work.

Try going into model setup, then go into mixing. Aux 1 channel is usually assigned to the flaps Then set up your aux 1 in the left box and. The gear in th right box . This should allow both servos to work together with whatever switch you assigned in the flap setup. I use channel B, because it is a three way switch. Go into flap system, where you can have 3 positions. Flaps up, takeoff flaps and landing flaps. You can also setup the servo speed you want. When in flap set, play with the percentages to get the flaps where you want them. You can then go into custom voice setup and assign the voice alerts you want. Hope this helps
Wisconsin John

[hr]
Try going into model setup, then go into mixing. Aux 1 channel is usually assigned to the flaps Then set up your aux 1 in the left box and. The gear in th right box . This should allow both servos to work together with whatever switch you assigned in the flap setup. I use channel B, because it is a three way switch. Go into flap system, where you can have 3 positions. Flaps up, takeoff flaps and landing flaps. You can also setup the servo speed you want. When in flap set, play with the percentages to get the flaps where you want them. You can then go into custom voice setup and assign the voice alerts you want. Hope this helps
Wisconsin John
[hr]
Try going into model setup, then go into mixing. Aux 1 channel is usually assigned to the flaps Then set up your aux 1 in the left box and. The gear in th right box . This should allow both servos to work together (if they don't, reverse one of them). Then assign a switch in flap system setup. I use channel B, because it is a three way switch. Go into flap system, where you can have 3 positions. Flaps up, takeoff flaps and landing flaps. You can also setup the servo speed you want. When in flap set, play with the percentages to get the flaps where you want them. You can then go into custom voice setup and assign the voice alerts you want. Hope this helps
Wisconsin John

[Iowa54]

RE: Dynam C-188

Thanks for the info. It worked out well. Only problem I had was in the timing . Both would drop at the 3 sec rate I had set but,only 1 would retract slowly. The other one would close back fast. Played around with it for an hour or so and just decided I didn't,t need the slow time. With a Y cable this one would need a reverser.
Thanks. Kevin

[Wisconsin John]

RE: Dynam C-188

Glad I could Help.

Check out my Hangar 37 Quick Tips on my You Tube Channel (see attached link). If you like it, please subscribe. I will be doing a lot of these quick tip videos in the near future.
Thanks-John

Hangar 37
https://www.youtube.com/channel/UCdSHL9qqiUlwhDG0wIPOCew/feed?activity_view=3

[Iowa54]

RE: Dynam C-188

OL,Blue went for her maiden today and it went pretty well, Wind was stronger than I would have liked ( 8-15mph) but, all was well. 1st time up I hit the throttle and man she shot almost straight in the air. About a 3ft run out LOL After chasing it all over in the air I got it landed and found out I didn't set any expo or turn down the rates. Could have sworn I did but, lesson learned. Set the expo and rates and flew 5 more batteries thru her and it handled very well. Several others commented how well it flew. Also flew my Waco and it was great in the wind also. 2500's in the C-188 and 2200's in the Waco. The only thing that I need to fix/look at anyay is on the last flight with the C-188 I used the flaps and after landing 1 flap didn't return to normal. bad servo/connection, receiver issue or what I'll check it out. Looks like the weather is closing in for awhile here anyway..All in all and good day flying...........

[Flygirl]

RE: Dynam C-188

OL,Blue  went for her  maiden today and it went pretty well,   Wind was stronger than I would have liked ( 8-15mph) but, all was well.     1st time up   I hit the throttle and man she shot almost straight in the air.   About a 3ft run out LOL     After chasing it all over in the air I got it landed and found out I didn't set any expo or turn down the rates.  Could have sworn I did  but, lesson learned.    Set the expo and rates and flew 5 more batteries thru her and it handled very well.  Several others commented how well it flew.  Also flew my Waco  and it was great in the wind also.   2500's in the C-188 and 2200's in the Waco.   The only thing that I need to fix/look at anyay is on the last flight with the C-188   I used the flaps and after landing 1 flap didn't return to normal.   bad servo/connection, receiver issue or what I'll check it out.  Looks like the weather is closing in for awhile here anyway..All in all and good day  flying...........

Glad to hear it went well Iowa!

[Iowa54]

RE: Dynam C-188

Gave it a quick check out today and looks to be the servo. Swapped it to a different channel and it did the same thing. Full down and no other response. looks like a project in the make.