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GP Waco?

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Old 11-24-2014, 06:57 PM
  #1251  
Flyrc67
 
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I have been thinking about this plane for a while, but am concerned about getting it in my car. The issue I have is with the fuselage length. Could someone verify the fuselage length with the OS 1.20 four stroke as well as with a DLE20 both using a blunt type spinner. Thanks in advance for the help.
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Old 12-01-2014, 08:28 AM
  #1252  
althepal88
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59 inches
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Old 12-01-2014, 05:38 PM
  #1253  
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Thanks very much for the measurement.
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Old 06-28-2015, 04:31 PM
  #1254  
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Originally Posted by codedlanguage View Post
BTW ... talking about nose heavy issues ... is there anyone using NGH 38cc 4 stroke engine on GP Waco ?
On my Stearman I find its quite useful to have it on the nose heavy side ... i helps me a lot during the flight and on landings.
Hi there ! I know this thread has been around for a long, long time, but I was interested to know if you did try the NGH GF 38 in the Waco? I have one of those engines sitting around and am looking for a home for it. I suspect it would be pretty heavy on the nose, but there is a Youtube video of someone flying just this combination.
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Old 06-28-2015, 06:13 PM
  #1255  
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New Falcon 16x8 prop looks realistic------I put one on my J-3 Cub also........
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Old 06-29-2015, 06:06 AM
  #1256  
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Originally Posted by ALFIEV View Post
Hi there ! I know this thread has been around for a long, long time, but I was interested to know if you did try the NGH GF 38 in the Waco? I have one of those engines sitting around and am looking for a home for it. I suspect it would be pretty heavy on the nose, but there is a Youtube video of someone flying just this combination.
No, NGH 38cc found a home in a ECOM RC Tiger Moth. It seemed to heavy and massive for the Waco. I ended up installing a 26cc RCS SV.
I did not finished the build yet but seems to be a good combination.

PS: There are a couple of videos on youtube showing a NGH38 powered Waco.

George
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Old 06-29-2015, 04:49 PM
  #1257  
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Thanks for the reply George. Yeah, I have seen the Youtube vids. The NGH 38 is an in-betweens size, two underpowered for a 50cc sized model, too big for anything smaller than a 30cc model. Might still try it though, looked o.k in the video.

Alf
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Old 07-02-2015, 12:49 AM
  #1258  
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Looking forward to see some installation pictures !
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Old 07-02-2015, 04:58 AM
  #1259  
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Has anyone else had an issue with the color match of the plastic and fiberglass parts? I just finished mine last night. Early in the assembly I realized the color of the painted parts was about two shades lighter than the monokote. It sucks but I think I'm going to leave it alone.
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Old 07-29-2015, 11:33 AM
  #1260  
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Well, the assembly (note careful avoidance of the word build - yes, I have read this whole thread) is going quite well I think. I am quite enjoying the project, only one small issue so far, two of the blind-nuts had an issue, perhaps glue in them, where the socket head screw wouldn't wind in. Problem is, these are inaccessable, in both cases had to cut structure away to get a pair of curved long-nose pliers onto them to get them out and fit a replacement. Means my brand new model has a repair to the leading edge of the upper wing and a repair to the fuselage adjacent to the cabane strut and I haven't even crashed it....yet!!!!
NGH GF 38 does look big up front, but so far I am happy with the fit. Will post a few pics of the fit of that engine soon.
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Old 07-29-2015, 01:18 PM
  #1261  
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You could have just tried to re-tap the blind nuts.
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Old 07-29-2015, 01:31 PM
  #1262  
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True that......... haven't got a tap for 4-40. Should have held off and ordered one I guess!
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Old 08-08-2015, 08:43 PM
  #1263  
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So, got to maiden my Greatplanes Waco with the NGH GF 38 engine fitted. Went really really well!! Needed some nose-up trim, but everything else was just fine. I was expecting it to be a handful on the take-off roll, but easy application of power and some use of the rudder kept it straight. Climbed out beautifully.

Elevator had plenty of authority as per the high-rate setting, have since dialed in a bit more aileron and rudder travel as I wanted more rudder for ground steering and I felt the aileron was a bit slow (but probably scale!!) at the high-rate settings.

Landing was pretty quick, tail stayed off the ground for a long time when landing and when I fed a little elevator in to sit the tail down she became airborne again!! Will watch for that in future.

Really happy with this model!! I have included a few photos of the engine set-up, codedlanguage showed an interest a few posts back. I did not add any weight anywhere, it is fairly well balanced as is. Perhaps it is a tad nose-heavy, but it climbs out fine and is trimmed out level so I think I can live with it. The 4 stroke sound is awesome!!

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Old 09-09-2015, 04:48 PM
  #1264  
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I just did my maiden flight in my Waco with a DLE 20 on it swinging a 17-6 APC prop ( going to change to a falcon 17x6). On the first take off roll it went hard to the left once the tail wheel left the ground. I had to take it back and check over a few things but could not find anything wrong. On my next take off roll out I kept a little up elevator on and was prepared for the turn to the left, still happened but not as bad. I had a fair amount of expo in for my ailerons which made turning a pain. But other than that I added a few clicks of up elevator and a couple of clicks of right aileron.
Great flying bird, nice handling and good on landings. My only concern is that my DLE 20 was very warm after my second flight and I am not sure why.I have the same opening on the front as in the manual says but did not add anything at the back. I have a small hole for the muffler and another small hole for the ignition cable. Should I add more cooling on the out flow side of the motor?
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Old 09-09-2015, 05:16 PM
  #1265  
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Wolflord - Congratulations for the maiden. As to the cooling, I have 30cc MVVS in my Waco. I discarded the front dummy cylinders and made additional cut behind the cowl (see photos) to allow additional air to get out, as I found the cooling "ring" to be insufficient. This small cut should be enough to resolve your cooling issues even if you keep the dummy cylinders in place (and is hardly visible).
Cheers,
Eran
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Old 09-09-2015, 07:51 PM
  #1266  
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I have a cut-out approx. same position as erans. My cut-out is quite a bit larger as I had to accomodate the carburettor on my NGH GF-38. I have seen a number of posts on this thread showing reasonably large cooling air outlets around this same area. Don't be afraid to open it up some!!
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Old 09-10-2015, 07:59 AM
  #1267  
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ALFIEV..........I have always wanted to know how that 38 would do in the Waco. I am only flying with a G23, but I love the way she flies. erans.............I have a little more cut out for ventilation out. I also don't have the cowl ring to block the hot air out, I use DuBro cowl mounts. After breaking the ring one day (and ruining the cowl) I changed. The only thing that I have done lately is to paint it Apple Red. Just masked off all of the black trim, scuffed her up with a pad, and shot her with some paint from Walmart. Doesn't look too bad (at least from six feet).
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Old 01-10-2016, 12:39 PM
  #1268  
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Anybody not assemble theirs yet? I need tracings of the wing joiners as I just got a scratch and dent from tower and they don't sell these parts. PM if you do,thanks .
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Old 01-11-2016, 06:31 AM
  #1269  
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Wolford,
Nice looking plane and good luck with it. If you haven't resolved your cooling issue by I now I would tell you that the pictures you provided show that you don't have nearly enough outflow cooling. I have also used the formula of 3 times more outflow than inflow and it works pretty well. You might have to baffle the cowl to reduce some inflow and open up the bottom to increase the outflow to get your engine cooled down.
Hope this helps.
paul
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Old 01-11-2016, 08:21 AM
  #1270  
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Try this for cooling info Gas engine cooling and test results although he passed away PE knew his stuff You neeed to have flow not just a bigger opening. Full scale use baffling to force the air over the head and through the cooling fins to keep cool.
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Old 06-20-2016, 07:10 AM
  #1271  
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Well I got to maiden mine this wkend and all is well, a sweet flying airplane and a great replacement to my dearly departed Stearman. No cooling issues yet and the DLE 20 is plenty of power.
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Old 06-20-2016, 03:56 PM
  #1272  
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raptureboy - Congratulations for the maiden.
My WACO did its 200th flight last week. Now in "maintenance" due to another broken metal bracket, this time at the attachment point of cabane strut to the fuselage. I am replacing all with thicker ones (already replaced the eight in the wings due to breakages long time ago).

Eran
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Old 06-21-2016, 11:44 AM
  #1273  
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wow 200 flights. Thats awesome. I bet I came close to that with my PT- 17 before pile driving it into the ground last month. This is going to be my new favorite though.
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Old 02-25-2017, 02:34 PM
  #1274  
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I have been having issue with the wing strut braces braking. I contacted Great Planes but they do not sell them separately or a parts bag separately. Does anyone have any ideas what I can use or if there is anyone that has made some aftermarket ones?
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Old 02-25-2017, 04:03 PM
  #1275  
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I would start with K&S Brass strip (#8240) which is roughly 1/32" x 1/4" x 12". Cut to length with a dremel, round the ends with a disk sander or file (if desired), drill for the bolts, and bend to shape.
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