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Konrad
Very Strong User
OK,
The ones I'm using are at the bottom end of the budget servo I'd use on the Mefisto. I'm not about to rip them out.
Electrically they are fine. Assuming the wire (lead and pot) were good to start with. There is insufficient strain relief at the case exit. So not good if the leads are meant to move around. The gear train is definitely second tier! Backlash is at about the limit for this speed of model. I get some double centering depending on which way the servo is rotating. These were $10 servos and shouldn't be thought of as being in the same class as the KST $50 servo.
I think the Blue Bird $25 servo is just about perfect for the Blejzyk models, if the 10mm thickness isn't an issue.
The top drive flaps were no more difficult than the bottom drive. I think they help with lower drag and keep the linkage out of the weeds on landing
Konrad
Very Strong User
That is true. The way I did the top drive I didn't need to violate the rear spar. Do make sure you have enough clearance with those nice surface pockets, regardless of the surface drive.
ORRich
Very Strong User
All good Hank - thanks!
Konrad
Very Strong User
Konrad is not banded but he is not actively monitoring this forum. I often don't stop by unless somebody drives me here.
As to the question. I love my Mefisto. The only thing I'd change is adding extra carbon around the inside of the wing fillet, and/or make the wing opening a lot smaller. I'd seal the flap and aileron pockets to try to control warpage as a result of moisture changes. While I like my ballast tube as a fuselage stiffener, I'd size it for about 200 to 250 grams. While I do fly the Mefisto with my full weight 9 slugs (450g ?), the Mefisto really isn't a high wind ship. When the winds are in the 40 MPH plus range the wings can go into flutter. And this is with all the glass work going out to the 1/3 span.
So the take away is if I did another I'd follow Wayne's advice and focus the build for a moderate lift ship. The wing really can't hold up to high speed flight, so don't fly her fast.
Strong points are that it is a good light to moderate lift ship. Do add glass fiber across the V-tail mounting.
Love the skewed fuselage servo mounting, really love the 100° V tail and top drive flaps.
I don't like my dye job. I also don't like the servos I used.
All the best,
Konrad
As to the question. I love my Mefisto. The only thing I'd change is adding extra carbon around the inside of the wing fillet, and/or make the wing opening a lot smaller. I'd seal the flap and aileron pockets to try to control warpage as a result of moisture changes. While I like my ballast tube as a fuselage stiffener, I'd size it for about 200 to 250 grams. While I do fly the Mefisto with my full weight 9 slugs (450g ?), the Mefisto really isn't a high wind ship. When the winds are in the 40 MPH plus range the wings can go into flutter. And this is with all the glass work going out to the 1/3 span.
So the take away is if I did another I'd follow Wayne's advice and focus the build for a moderate lift ship. The wing really can't hold up to high speed flight, so don't fly her fast.
Strong points are that it is a good light to moderate lift ship. Do add glass fiber across the V-tail mounting.
Love the skewed fuselage servo mounting, really love the 100° V tail and top drive flaps.
I don't like my dye job. I also don't like the servos I used.
All the best,
Konrad
Last edited:
Just a short thank you to Konrad for sharing a tip for my Mefisto build - which will be focused
on minimum pack size. The V-tail had me puzzled, but Konrad sent me a drawing of the following solution
(still in initial stages of building):
I'm really hoping that will work. The V has turned out at least 100 degrees (unintentionally), so we'll see where that leads!
More pictures and a build log (in Dutch) will appear at
on minimum pack size. The V-tail had me puzzled, but Konrad sent me a drawing of the following solution
(still in initial stages of building):
I'm really hoping that will work. The V has turned out at least 100 degrees (unintentionally), so we'll see where that leads!
More pictures and a build log (in Dutch) will appear at
Blejzyk Mefisto
Onlangs via rc-netwerk een bouwdoos van een Blejzyk Mefisto op de kop getikt. Ik ben al langere tijd op zoek naar een beschaafde maat zwever die geschikt is voor (nederlandse) hellingen en indien mogelijk ook mee kan op vakantie met de zeilboot. Voor dat laatste heb ik al 2 jaar een Lidl...
www.modelbouwforum.nl
Konrad
Very Strong User
Looks great! I'd think that narrowing each stab span a bit (8mm) but leaving the elevator stock length will allow the control horns to align with the rear of the fuselage making it easier to connect with the stock bowden tubes.
Have I said I really like what you have done here!
After you get the nesting stabs to fit I'd glass the nest to the end of the stab with 2 or 4 layers of 0.5 or 0.7 oz per sqr foot glass, maybe 30mm past the seam .
I love my 100° +-2° V tail. I'm sure you will also. (I don't like 110° V-tails)
Have I said I really like what you have done here!
After you get the nesting stabs to fit I'd glass the nest to the end of the stab with 2 or 4 layers of 0.5 or 0.7 oz per sqr foot glass, maybe 30mm past the seam .
I love my 100° +-2° V tail. I'm sure you will also. (I don't like 110° V-tails)
Konrad
Very Strong User
I read that you wanted a glider nose fuselage. Aloft and Blejzyk have seperated noses for sale.
alofthobbies.com
Blejzyk
Artur Blejzyk, the owner of Blejzyk RC Models creates a wide range of flying artwork. The fiberglass work is excellent, and the wings are simply beautiful and efficient works of art. Artur manages to make some of the best looking wings in the industry, and the end result is amazing gliders that...
