Master Series Style P-39 Beta

[czchmate]

I am working on a master series P-39. This is my first Master Series style design. The plane can and has been fully built from the plans that are linked though some changes need to be made. The former skins may come out a few millimeters large. As of now you will need to cut your own battery hatch, though I plan to amend this soon. Tail servos will require custom holes as they are not currently in the plans. I also realized once building the aileron servos will need to be turned on their side as they are too tall to be inserted with the method I put in the plans.

The Build: I did not take pictures during the initial build but the plane is constructed similar to other master series models. As I update the plans I will include build photos. The main difference from other master series builds is that I doubled up the rudder and elevator. I also included a foam spinner. It held up for me but I forgot to put the backplate in the plans. The CG should be slightly forward of the front wing spar.

Flying: The plane flies great. It is not a beginner model. I may need to adjust the motor mount to better counter the torque roll on takeoff. Once in the air, it flies pretty smooth. I recommend having rates set as it is fairly nimble. Also, it stalls like a warbird so be ready for that. The plane carries its speed well so give yourself plenty of room for landing.

Specs:
Wingspan: 40 Inches
Weight: To be determined
Channels: Throttle, Ailerons, Rudder, Elevator, Split Flaps

I am open to feedback as this model is still in Beta but do not be offended if I don't respond or do not incorporate your ideas as I am a fairly busy college student. That is why I am posting it in this mostly finished state.

 

[The Fopster]

I am working on a master series P-39. This is my first Master Series style design. The plane can and has been fully built from the plans that are linked though some changes need to be made. The former skins may come out a few millimeters large. As of now you will need to cut your own battery hatch, though I plan to amend this soon. Tail servos will require custom holes as they are not currently in the plans.

The Build: I did not take pictures during the initial build but the plane is constructed similar to other master series models. As I update the plans I will include build photos. The main difference from other master series builds is that I doubled up the rudder and elevator. I also included a foam spinner. It held up for me but I forgot to put the backplate in the plans. The CG should be slightly forward of the front wing spar.

Flying: The plane flies great. It is not a beginner model. I may need to adjust the motor mount to better counter the torque roll on takeoff. Once in the air, it flies pretty smooth. I recommend having rates set as it is fairly nimble. Also, it stalls like a warbird so be ready for that. The plane carries its speed well so give yourself plenty of room for landing.

Specs:
Wingspan: 40 Inches
Weight: To be determined
Channels: Throttle, Ailerons, Rudder, Elevator, Split Flaps

I am open to feedback as this model is still in Beta but do not be offended if I don't respond or do not incorporate your ideas as I am a fairly busy college student. That is why I am posting it in this mostly finished state.
View attachment 239829

That looks fantastic - brilliant work!

 

[Draftman1]

Awesome!

Another plane to build

 

[danskis]

Great build and we get plans!!! Thanks for sharing.

BTW the plans appear to be incomplete.

 

[czchmate]

Great build and we get plans!!! Thanks for sharing.

BTW the plans appear to be incomplete.

Thank you for catching that. I have re-uploaded the plans and they appear to work now

 

[noso]

awesome design, Im building it now in a 130cm span.

But.. I have a question. Im trying my luck in designing a plane too but I get stuck at transforming the 3d design to 2d cutting template.
I use fusion360 hobby version.
How do you do that? what program do you use?
I really hope you can help me
kind regards
Noël

 

[czchmate]

Here are some build photos to help anyone who wants to attempt this build

 

[czchmate]

awesome design, Im building it now in a 130cm span.

But.. I have a question. Im trying my luck in designing a plane too but I get stuck at transforming the 3d design to 2d cutting template.
I use fusion360 hobby version.
How do you do that? what program do you use?
I really hope you can help me
kind regards
Noël

I use solidworks. I have access to it through my university. Solidworks has a surface tool with an unwrap feature. That's how I get the complex curves to be flat. I know other people can do it with fusion but I personally have not tried fusion. You could check out this YouTube channel:

 

[noso]

I use solidworks. I have access to it through my university. Solidworks has a surface tool with an unwrap feature. That's how I get the complex curves to be flat. I know other people can do it with fusion but I personally have not tried fusion. You could check out this YouTube channel:

thank you for the info..
I ve seen that series on you tube but he uses exactflat and at this moment it seems that program doesnt work anymore.

 

[Justaguyinvegas]

It looks speedy. Most WWII warbirds have huge cowls to contain the huge engines, which only makes unnecessary drag for our models. This plane was mid-engined so it had a much skinnier nose. I may have to build this...

 

[Karthik1130]

I use solidworks. I have access to it through my university. Solidworks has a surface tool with an unwrap feature. That's how I get the complex curves to be flat. I know other people can do it with fusion but I personally have not tried fusion. You could check out this YouTube channel:

I have one doubt, with respect to Solidworks CAD modelling of a foamboard skin which covers all around the set of formers, for example in tail-section, will you model the skin as surface as two halves in solidworks and then individually apply thickness to the two halves and unwrap. If that's the case how do you combine the two unwrapped foamboard skin plans into one single foam skin for the plan. I can't understand the process. Could you explain in detail or if possible could you provide the model file for study?

 

[Houndpup Rc]

I have one doubt, with respect to Solidworks CAD modelling of a foamboard skin which covers all around the set of formers, for example in tail-section, will you model the skin as surface as two halves in solidworks and then individually apply thickness to the two halves and unwrap. If that's the case how do you combine the two unwrapped foamboard skin plans into one single foam skin for the plan. I can't understand the process. Could you explain in detail or if possible could you provide the model file for study?

How I do in Onshape is: I export both halves and then import them into Inkscape as SVG's and put them together there, once both halves are lined up I use the "node tool" to break apart the two lines down the center and that gives me my skin.

 

[Karthik1130]

How I do in Onshape is: I export both halves and then import them into Inkscape as SVG's and put them together there, once both halves are lined up I use the "node tool" to break apart the two lines down the center and that gives me my sk

thanks houndpuprc, could you provide some detailed video tutorials for modelling this kind of master series foamboard builds?it would be really helpful for me.

 

[Houndpup Rc]

thanks houndpuprc, could you provide some detailed video tutorials for modelling this kind of master series foamboard builds?it would be really helpful for me.

No prob! I highly recommend using Onshape, @Mr Man and I both use it and @Mr Man has designed a LOT pf planes in it. I was trying to use FreeCAD but then I decided to give Onshape a try and its sooo much easier! (Yes, it's free!) I don't know of any videos on how to design planes with it (Though @Mr Man or me should do one sometime!) but it has a inbuilt free learning guide and if you have any questions you can ask here: https://forum.flitetest.com/index.php?threads/3d-programs.77716/
Here is the link for Onshape: https://cad.onshape.com/signin

 

[Karthik1130]

No prob! I highly recommend using Onshape, @Mr Man and I both use it and @Mr Man has designed a LOT pf planes in it. I was trying to use FreeCAD but then I decided to give Onshape a try and its sooo much easier! (Yes, it's free!) I don't know of any videos on how to design planes with it (Though @Mr Man or me should do one sometime!) but it has a inbuilt free learning guide and if you have any questions you can ask here: https://forum.flitetest.com/index.php?threads/3d-programs.77716/
Here is the link for Onshape: https://cad.onshape.com/signin

thanks for your kind support,in your opinion what's the most important skill a beginner entering into designing rc plane should develop? I feel like I am poor in 3D spatial visualisation skills in my mind.i feel difficult to come up with build ideas of my own.

 

[Houndpup Rc]

thanks for your kind support,in your opinion what's the most important skill a beginner entering into designing rc plane should develop? I feel like I am poor in 3D spatial visualisation skills in my mind.i feel difficult to come up with build ideas of my own.

I felt that way with my first plane I set out to design...But I would start by looking at other models and how they are put together. once you kinda get a idea on how you want it, it will kinda just fall together....You may have to try a few times to get what you want , but it will come with practice

 

[Mr Man]

No prob! I highly recommend using Onshape, @Mr Man and I both use it and @Mr Man has designed a LOT pf planes in it. I was trying to use FreeCAD but then I decided to give Onshape a try and its sooo much easier! (Yes, it's free!) I don't know of any videos on how to design planes with it (Though @Mr Man or me should do one sometime!) but it has a inbuilt free learning guide and if you have any questions you can ask here: https://forum.flitetest.com/index.php?threads/3d-programs.77716/
Here is the link for Onshape: https://cad.onshape.com/signin

I really ought to….

 

[Houndpup Rc]

I really ought to….

Yeah being that you are the only one who has made proven flying models so far! 😂 (I will stick to the build videos)

 

[Karthik1130]

could someone provide onshape cad data link for any of their completed master series build. it would be really helpful for me!

 

[Mr Man]

could someone provide onshape cad data link for any of their completed master series build. it would be really helpful for me!

I’ll send a PM