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May 11, 2018, 10:09 AM
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Ralph A. D'Amelio's Avatar
Build Log

Druine Turbulent


I have decided to do the Durine Turbulent for my summer low wing plane . There are some great plans on Outerzone/UK. The 3 I considered were Gordon Whitehead, Chuck Cunningham and Doc Matthews, the later 2 from good old RCM. I decided on Doc Matthews plan as it is straightforward and lends itself to being built in $S foam board The plan is presented here.

This is really a very simple build. Will show some construction pics as we go along and hope they provided some insight and maybe some inspiration for others.
Last edited by Ralph A. D'Amelio; May 11, 2018 at 10:54 AM.
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May 11, 2018, 10:29 AM
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Ralph A. D'Amelio's Avatar
Some specs

Wing span 60"
Chord 10"
Style KFm-2
Fuse length 39"
Material $S foam
Covering 1 oz FG /WBPU
WT estimated 35-40 oz

BTW all the formers have paper on both sides for added stiffness and strength however, the fuse has paper on the inside and the outer layer of paper will be removed before covering with FG/WBPU.
Last edited by Ralph A. D'Amelio; May 11, 2018 at 10:35 AM.
May 11, 2018, 11:05 AM
EB-66C Team Member
J Morgan's Avatar
Hey Ralph!!!!
Great to see you here. How you been? Looks to be a great build too.

J
Latest blog entry: Me-263/Ju-248
May 11, 2018, 11:22 AM
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Ralph A. D'Amelio's Avatar
Hey J!
I'm doing good as long as my knees hold out!

This is a pretty little airplane. I'm going to work my way up to fly me my favorite in the entire world F-4 Phantom
Last edited by Ralph A. D'Amelio; May 11, 2018 at 11:30 AM.
May 11, 2018, 06:35 PM
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Ralph A. D'Amelio's Avatar
I decided to use a lifting stab per Cunningham design. Should give me good authority on landing.
May 12, 2018, 12:34 PM
old foamie
Hey, you are on the kitchen counter again, does building time get in the road of eating time?
May 12, 2018, 03:45 PM
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Ralph A. D'Amelio's Avatar
Hehe Old Foamie.........Never, that's what tables are for...geez!

BTW it you change last 12 " of wing tips to a taper poly dihedral you got a Jodel Bebe D9. So with a 2nd wing I have two models.......
May 12, 2018, 04:57 PM
EB-66C Team Member
J Morgan's Avatar
Ah yes, I love F-4s too Ralph. Believe it or not, still have that one in my stable.

J
Latest blog entry: Me-263/Ju-248
May 14, 2018, 11:06 AM
Registered User
Ralph A. D'Amelio's Avatar
A little more progress front cowl with removable battery access hatch. Fuse and hatch covered with 1 oz. FG/WBPU .

Leopard 3536/960 from Headsup RC . Its an overkill but all I have laying around 307 watts with a 11/4.7sf @ 27 a but hey that's what a throttle is for!
Will leave lower cowl open until maiden to be able to adjust thrust lines.
Last edited by Ralph A. D'Amelio; May 14, 2018 at 11:18 AM.
May 15, 2018, 06:44 AM
old foamie
Coming along great, as fast as you build do you have a garage full of planes?
May 15, 2018, 11:29 AM
Registered User
Ralph A. D'Amelio's Avatar
A bunch in attic others gone to the great hanger in the sky one way or another.

Some more done: LG install, motor and esc installed as well as rudder elevator servos. I put them behind the back of cockpit since it looks to be nose heavy.
Last edited by Ralph A. D'Amelio; May 15, 2018 at 08:27 PM.
May 15, 2018, 08:33 PM
old foamie
I like your test pilot, any problems, he can fix it.
May 16, 2018, 06:57 AM
Registered User
Tuned in and enjoying the build
May 16, 2018, 01:15 PM
Registered User
Ralph A. D'Amelio's Avatar
Fix-it Felix is my best bud.....supervisors all my building.

Gere Sport how are you. You got me doing Turbulent and Jodel Bebe about 8-10 years ago....thanks.

Got the wing rough out KFm-2 which flew well on big T-28. Looks good as a trike, almost need to do another wing with mains set back and removable nose wheel.
Last edited by Ralph A. D'Amelio; May 16, 2018 at 01:38 PM.
May 16, 2018, 01:37 PM
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Ralph A. D'Amelio's Avatar

KFm-2 AoA setting


KFm experts, is there a need to set a positive AoA for a low wing and how does it effect takeoff if at all?

No takers, OK I'll answer it myself. No, since it is a tail dragger its at a high AoA at rest and provides sufficient lift to raise the tail and lift off with a nudge of back-pressure. Hehehe
Last edited by Ralph A. D'Amelio; May 17, 2018 at 01:49 PM.


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