Dynam C-188

[Wayne C Hall]

can some one tell me the length of the stool wing tips , would like to put them on another plane thanks

[Harry]

Hi all, I'm new here and need some assistance with the assembly of my C188 and as I gathered from various posting all over the internet, the instructions says just about nothing. (if you can see them). What is the tube with a marking "FF10" included in the kit? Is the glue to fix the pilot figure in position? ... or is it oil for the wheels or something?

Please help.

[farmflyer]

That is the canopy glue it is made so it dries clear in case you get some off the edge up onto the clear part of the canopy it won't show that much.

[xviper]

Mine should be here in a couple of weeks. I've also got a 4-blade prop for it. I'll be trying the one from the RocHobby Corsair (10.5 x 8 x 4).

[Harry]

Thank you for your response farmflyer. At that point I already glued the pilot in place with the FF10 glue because I shaw the hand in the instruction photo applying the FF10 glue, or looked like it. (Used a magnifying glass to see that!). I then started to doubt whether I used the correct glue. Thus to question.
Must say that the just about non existent chinglish does allow for a lot of confusion. During my surfing on the web I even came across reviews where they say the two tubes of contact glue supplied is actually a two part epoxy. (or is it?)

I'll be using "Foam-Tac" glue. Apparently it is much better than the supplied contact glue. Any comments?

[farmflyer]

I've used some of the contact glues supplied in the kits before without a lot of issues but now only use hot glue or foam-tac. Foam-Tac sets up quicker and I think holds better. On hot glue I use a dual temp gun the low setting is good for things like reglueing seams the tip won't melt the foam as easy.

[Harry]

Regarding my query about the "FF10" Dynam Glue above (post #42): Apparently it is a CA glue "FF"= Foam Friendly and "10" is the 10 minutes drying time.

[Flygirl]

Regarding my query about the "FF10" Dynam Glue above (post #42): Apparently it is a CA glue "FF"= Foam Friendly and "10" is the 10 minutes drying time.

I used CA on my canopy. Worked fine! If I can make a suggestion, put a little scotch tape up under the canopy roof to strengthen the canopy top a little. The first time mine flipped over in long grass it cracked the top. You'll like the plane.... It flies well and has plenty of "oomph" when taking off. Kind of surprised me actually...

[Harry]

If I can make a suggestion, put a little scotch tape up under the canopy roof to strengthen the canopy top a little. The first time mine flipped over in long grass it cracked the top.

Good suggestion flygirl! Unfortunately my canopy is already glued in place. Mine is nearly ready to maiden.

Question: I have one problem now with the flap travel. I realized that a typical 5 channel radio is not necessarily acceptable due to the 5th channel's travel limitation. (all or nothing). (Spektrum 5e). Flap 54° servos would have been a better choice.

What is an acceptable max flap movement? (I have already moved the push rods to get the minimum movement but it still seems to be to much)

[Harry]

Building Tip: Wheels attachment method.

I have read and heard pilot Ryan mention, and warn pilots to fix the wheel nuts with some glue etc.

Herewith my method of attaching wheels to aluminium and carbon fibre landing gear systems. Firstly the axle nut can be tighten properly and the whole setup just looks neater!

[xviper]

Harry, that wheel thing is a great hint.
As for flap travel, I usually like to have as much travel as possible and test it on the first flight up high to see what it does and then reduce as needed (if needed). This should be a "floaty" plane and such planes can deal with a lot of flap. Fast planes like EDFs and pusher props balloon too much with too much flap. As you get into the hobby deeper, you will find a DX5e to be too limiting.

[Flygirl]

That is a good hint Harry....! Gonna swap mine around like that tonight! Sorry I didn't get to you sooner on the canopy top Harry! :-(

Flaps.... Full flaps almost slows it down too much. In the video above at the 1:47 mark I hit full flaps just to see what it would do since it was the maiden and it almost came to a stop in the air. I should have learned from that and not hit full flaps when landing on that flight because I stalled it. It would have been better I think with a takeoff flaps setting. Viper is right, it is a floaty plane so maybe keep a tick of power to keep it floating into the runway?

[Harry]

Harry, that wheel thing is a great hint.
.... you will find a DX5e to be too limiting.

Yes xviper2, you are right. My FMS Cessna 182 flaps works just fine with the 5e radio but FMS used 53° servos. I was hoping for the same here. I bought the 5e while while waiting on Canada immigration for my papers. (still waiting). Anyhow I do have a DX6i for my helis which I fly in mode 2. I fly my planes in mode 1 so I 'll probably go for a new radio like the new DX6.

Building Tip: I can make the flaps work on the 5e by rotating the servo arms forward with +/- 35° to 40°, thus shortening the axial travel of the push rod. This does call for getting the servo arm screw loose and damaging the wing a little bit and cutting open where the servo arm will go into the wing. This also gives the flap going down a huge exponential effect, limiting a sudden possible ballooning. ( This is the way we got exponential in the days before computerized radios.)



However, I do feel like treating myself to a new radio. I miss the exponential feature not available on the 5e.

[Harry]

The COG (CG) Get the balance right!

Did my C188 maiden flight on Sunday morning and .... oh dear! Took off and immediately fought a tail heavy situation. I trimmed it out and realized even more how serious the balancing problem is. Any case, I flew a couple of circles to get the feel but Dusty was very mushy, especially in the turns, all this in spite of my research on the COG (CG) position. I have since checked the balance again on the common believe of where the CG is suppose to be, resulting in adding 21gr (3/4 oz) to the nose. Will recheck the balance again during this week. I have also spring loaded my landing gear which resulted in an additional 7gr to the nose.

The landing gear does bend very easily and I decided to "spring-load" the aluminum gear. I used a 2.3mm (3/32") steel wire which I tried to shape along the aluminum pattern. One should also be careful not to over strengthen the landing gear to much. The landing gear should be the weaker link (Landing gear vs fuselage mounting). ..and yes, I have changed the wheels to 3" Dubro wheels. (lite).

[Hippie 64]

Harry I think my battery is all the way forward . Also I replaced the wheels with some Dave Browns for a little better rolling . The weak point is in the gear mount where it connects to bottom of the fuse . I did some reinforcing on mine .

Bryan

[xviper]

Harry, as much as I love my DX6, I wish I had waited and held out for the new DX8. I ran out of model memory on my old DX8 and got the 6 as I thought I'd just use the 8 for a few of those models I have that required 7 and 8 channels. Now my 8 is starting to get "glitchy" and I'm not sure how much longer it will continue to serve me. It's getting on over 5 years. Had I known about the new 8, I'd have waited and just gotten it and be done with it. It's only an extra $100.00 over the 6. Something to consider.
As for you CG situation, I have read elsewhere that some guys go as big as a 3300mah, 4s battery without any added weight and without any flight problems. In fact, some have even gone as big as 4000mah without and problems. Apparently, this plane can carry the weight easily and without complications to flight. Mine will be here in a couple of days and I plan to go directly to the bigger batteries.
PS. Merritt is a beautiful place. I go through there on my way to Vancouver. I've even stayed there many years ago with friends. It's so mountainous, wherever do you fly? If I lived there, I would get seaplanes and fly off Logan Lake.
Merritt is an odd place to immigrate to. Unless you're retired or in the tourist industry, there isn't much in the way of employment. I believe the mine has long since closed up or at least doesn't employ that many people anymore.

Hippie, do you find the landing gear material is soft? I fly off very rough grass and I was wondering if the stock gear can take it. I think this plane can land very slowly and very softly but those lumps and holes can really be hard on the gear. I fly with a friend who has the Eflite version (Pawnee) and his gear is holding up well on our field. I also have a similar gear from an old Super Dimona, which is a much heavier plane. I'll see is it has more strength.

[Flygirl]

I'll chime in.... I'm flying a 3500 battery all the way forward and the CG is spot on and flies well. The only issue I have had with the landing gear is the screws coming loose that hold it on. As far as power, this plane has plenty. It really zips along if you want it to but I like the scale flight speeds myself.

[Iowa54]

I took an idea from my Tiger Moth for the landing gear. Haven't tried it out yet but, should work out just fine. Drill 2 holes and 2 longer screws for the cowl..

[Lon]

I took an idea from my Tiger Moth for the landing gear. Haven't tried it out yet but, should work out just fine. Drill 2 holes and 2 longer screws for the cowl..

Looking good Iowa54!!! After seeing you fly her on Sunday, and how it performs. She's broke onto the wish list (though you know I'm a warbird guy). You really fly this plane well.

[Iowa54]

Thanks Lon. its a fun plane to fly but, the landing gear needs some help. I'm hoping this simple fix will do that.