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General control line discussion => Open Forum => Topic started by: Phillip Kenney on March 14, 2016, 11:48:44 AM

Title: Guillows Profile Trainer 3
Post by: Phillip Kenney on March 14, 2016, 11:48:44 AM

Downloaded the plans over the weekend and rummaged through the balsa box and found I am short two 3/16 x 3" sheets to build the plane. The fuse calls for 3/4" balsa but I have 1/2" I can reinforce with some 1/8 lite ply and I have the 1/2" for the wings.
The question is, would a Fox .25BB be adequate power for this plane if the desired performance level is flying in circles to overcome dizziness? Plans show up to a .35 but that .35 would be a 60 year old design so I'm thinking the fox .25 may be at least equivalent the engine shown.

Title: Re: Guillows Profile Trainer 3
Post by: badbill on March 14, 2016, 11:57:11 AM

I learned how to fly CL on one of those in 1969. It had a .19, McCoy I think, and had plenty of power. Where'ed you find the plans?

Title: Re: Guillows Profile Trainer 3
Post by: Dave_Trible on March 14, 2016, 12:43:56 PM

I have the Trainer II and find its almost over powered with an Enya .19 on 60' lines.  I have to run it rich and use a flat pitch prop.  Your larger one should be quite well powered with the .25.  This is even more so if you fly from a smooth surface where you can get a long takeoff run.  Grass would require more power to get it going.  The II that the Topeka club uses has a Fox.19 and is launched in an idle.  It rolls pretty much a half lap or more to get lift off speed.  Once up its slow and perfect to train on.

Dave

Title: Re: Guillows Profile Trainer 3
Post by: TigreST on March 14, 2016, 01:26:47 PM

Flew one of these that was given to my brother and I, back in the mid 1970's.  We had a Testors Series 21-.35 on the nose.  What a beast  ;D.  "Pull your arm off." is what we used to say.  That was on 70' lines too as I recall.  Now this assumes we are talking of the big one.  There was some chat about that plane here:

http://stunthanger.com/smf/stunt-design/'airfoils'-are-they-really-important/msg440294/

Title: Re:
Post by: James Holford on March 14, 2016, 03:57:29 PM

My dad still has his!

Title: Re: Guillows Profile Trainer 3
Post by: Phillip Kenney on March 14, 2016, 04:39:31 PM

To Badbill: I really have no clue where I found the actual plans. On set was 4/5 size and finally I found one that printed out full size, 36" wingspan which I presume is correct.
Not sure on the rules about posting plans here but send me a message and I'll send you the file I had taken to the copy shop.

Flying field will most likely be a grass field. My preference for training is not to fly over hard surfaces.

Title: Re: Guillows Profile Trainer 3
Post by: Tom Niebuhr on March 14, 2016, 04:53:50 PM

Any .25 t0 .35 will work. Too much power is not good for a beginner

Title: Re: Guillows Profile Trainer 3
Post by: Motorman on March 14, 2016, 05:05:36 PM

With a Fox 25BB you'd have to put the prop on backwards.


MM

Title: Re: Guillows Profile Trainer 3
Post by: George Albo on March 14, 2016, 05:14:51 PM

Quote from: badbill on March 14, 2016, 11:57:11 AM

I learned how to fly CL on one of those in 1969. It had a .19, McCoy I think, and had plenty of power. Where'ed you find the plans?

 http://www.hippocketaeronautics.com/hpa_plans/details.php?image_id=3550&sessionid=de53e7f35124c4626d45735ca2e1eb82

Title: Re: Guillows Profile Trainer 3
Post by: Phillip Kenney on March 14, 2016, 05:48:10 PM

Thanks for posting the link. I would have found where I got it, eventually...

Title: Re: Guillows Profile Trainer 3
Post by: Brent Williams on March 15, 2016, 01:43:41 AM

Interesting plane.  Looks like a robust trainer to get folks through the rough initial flight/crash phase! 

http://postimg.org/image/a968tcs8l/full/ (large photo size)

(http://s18.postimg.org/vitv478jd/Guillows_Profile_Basic_Trainer_3.jpg)