Blejzyk FIRST 2-meter Polyhedral Build

[Konrad]

There is no structural strength in bonding the foam core. Per the manual you are to under cut the foam adjacent to the veneer skin. This is to allow an adhesive (epoxy) bead to form. This bead is what binds the stress skins of the panels to each other.

Mefisto build (BLEJZYK)

Depends on construction. Keep the loops tight, and make that last twist just right, and putting it on and off will be tighter than your current plastic clip. Did I mention it should be music wire. Edit: the sample in the post is actually quite tight. I had to use a pair of needle nose pliers to...

forum.alofthobbies.com

All the best,
Konrad

 

[George Eliot]

Thanks Konrad

There is no structural strength in bonding the foam core. Per the manual you are to under cut the foam adjacent to the veneer skin. This is to allow an adhesive (epoxy) bead to form. This bead is what binds the stress skins of the panels to each other.

[URL unfurl="tr

Thank You
will look in to that
the First 2M building guide says nothing about poly tips
seems to be guide to building the First + two piece wing

mac

 

[George Eliot]

The KS HD 47MG is a pretty tiny servo for a plane this size, but if the goal is to keep her light, I suspect you will be fine.

thank you
what size servo should i be using with this plane
is there a chart or guide to figuring out what size servo should be using with what size plane

yours truly
mac

 

[Konrad]

At this size (weight and speed) of aircraft, servo selection is more of an art than a science. The HD-47mg will work and work well at 7.4V. But it really is too light and the gears are a bit delicate for this application. Since you will be needing to add nose weight, saving on servo weight gains you nothing. As this set up uses pushrods (snakes) their weight will place a large stress on the gears when the nose hits anything. The delicate gears even though they are metal might not survive well.

KS HD47MG Servo - 1.2Kg (16.66 oz in), .10/sec - High Voltage

High voltage (4.8 to 7.4V) digital servo with a coreless motor and tiny weight with reliable metal gears and good specs makes this a very nice servo that could sell for a lot higher price at some other store.

alofthobbies.com

For your glider the ubiquitous 9 gram servo would work. But as you need nose weight I’d look for the added durability that the 17 gram to 24 gram class of servo with its larger gear train.

Power HD 1711MG Digital Metal Gear Servo - 3 kg, .13/sec

The HD-1711MG servo is a great economical servo for every day use.

alofthobbies.com

Emax ES09MD Servo - 2.6Kg (36.11 oz in), .08-sec - 14.8 Grams

The Emax ES09MD digital servo features a full set of Metal Gears high quality Noble pot, and plenty of performance for 450 Heli swash plates and other applications.

alofthobbies.com

All the best,
Konrad

 

[George Eliot]

thanks Konrad

enjoying this bit of learning, was ordering larger servos thought heck while am at it ordered a Blejzyk UMI kit

yours truly
mac

At this size (weight and speed) of aircraft, servo selection is more of an art than a science. The HD-47mg will work and work well at 7.4V. But it really is too light and the gears are a bit delicate for this application. Since you will be needing to add nose weight, saving on servo weight gains you nothing. As this set up uses pushrods (snakes) their weight will place a large stress on the gears when the nose hits anything. The delicate gears even though they are metal might not survive well.

KS HD47MG Servo - 1.2Kg (16.66 oz in), .10/sec - High Voltage

High voltage (4.8 to 7.4V) digital servo with a coreless motor and tiny weight with reliable metal gears and good specs makes this a very nice servo that could sell for a lot higher price at some other store.

alofthobbies.com

For your glider the ubiquitous 9 gram servo would work. But as you need nose weight I’d look for the added durability that the 17 gram to 24 gram class of servo with its larger gear train.

Power HD 1711MG Digital Metal Gear Servo - 3 kg, .13/sec

The HD-1711MG servo is a great economical servo for every day use.

alofthobbies.com

Emax ES09MD Servo - 2.6Kg (36.11 oz in), .08-sec - 14.8 Grams

The Emax ES09MD digital servo features a full set of Metal Gears high quality Noble pot, and plenty of performance for 450 Heli swash plates and other applications.

alofthobbies.com

All the best,
Konrad