Anybody else scratch building tonight?

[Shurik-1960]

Tdugar. I really liked this model made by Julius Perdan. I printed out the drawing yesterday and cut it out today. I decided to make this model , but in the process of construction I will do my own , based on previous experience . My goal is to make this model lighter without losing strength. I ask for advice: post a photo of model manufacturing in this topic or create a separate topic on the construction of the F-22 from Julius Peredan.Link to the website : https://paper-replika.com/index.php/rc-foam-project/f-22-raptor-rc-plane-plans . I will order the engine and servomechanisms during the construction process on aliexpress . Sheets of foam with a thickness of 5mm should arrive this week in the parcel.​

 

[akimbo]

I'm scared to death when it comes to painting dtfb I painted my Su-30 and absolutely ruined it so I'm really hesitant

I only had that problem when I put too much at one time. I just do 3 super light coats and fill in any light spots at the end.

 

[tomlogan1]

Tdugar. I really liked this model made by Julius Perdan. I printed out the drawing yesterday and cut it out today. I decided to make this model , but in the process of construction I will do my own , based on previous experience . My goal is to make this model lighter without losing strength. I ask for advice: post a photo of model manufacturing in this topic or create a separate topic on the construction of the F-22 from Julius Peredan.Link to the website : https://paper-replika.com/index.php/rc-foam-project/f-22-raptor-rc-plane-plans . I will order the engine and servomechanisms during the construction process on aliexpress . Sheets of foam with a thickness of 5mm should arrive this week in the parcel.​

Very ambitious plans but a beautiful model. I hope yours turns out as well and would be interested to follow your progress. Good luck.

 

[Shurik-1960]

I printed out the drawings. Thanks to Julius Perdana, I cut out all the details and checked for docking. I bought 2 fishing rods for $ 1 at the Angler store. I put the tops of the rods in the keels. Two layers of foam with a thickness of 3 mm are sanded to a thickness of 4 mm. I will make the stabilizer of the model one - piece . The ailerons will be increased .I ordered two packages of foam with a thickness of 5 mm for $ 20 with delivery. : https://alnado.ru/product-category/penolist-dlya-modelirovaniya/ . The store sells interesting kits for those who do not have time to print and cut. The cost of $ is just ridiculous. If I were in the management of Flitetest, I would buy such kits in bulk for the modelers of the site. Beautiful models and all models really fly after assembly. I have collected about 8 sets for my friends' children. For me, collecting is a pleasure, for children - the joy of flying.

 

[Brian B]

I think I've got my next project lined up. 60" long x 40" WS, XB-70 belly-lander twin pusher with KVm2 wing. Time to lay out plans so I can start cutting. Based more on prototype #2 which added 5 degree dihedral compared to the more commonly seen #1 which was almost flat. Haven't finalized tip angle yet, but probably a little more than this. Maybe I'll try and work out servo adjustment.

 

[Shurik-1960]

KFM2 profile - loses a lot in aerodynamics and strength properties of a wing with a flat-convex profile. I made more than 10 models with a KFM profile (according to the drawings of the authors) and then converted to a flat-convex profile, the models flew like heaven and earth. Make a wing for this model from 3mm foam with a plano-convex profile: the appearance of the model will become more replica and the rigidity of the wing will appear without adding weight. If a high speed is desirable for the model, make the plano-convex profile thinner. I tried the FM2. 3 profile for models flying in a non-motorized form from the slopes - they almost barely flew in the wind from 8m/sec. When modified to a flat convex profile, but thin, it was possible to fly without landing for several hours in a wind of 5 m/sec.A striking example is a Shark with a KFM4 profile : it really did not fly from any modeler. With a thin profile, this model flew...barely.

 

[Brian B]

KFM2 profile - loses a lot in aerodynamics and strength properties of a wing with a flat-convex profile. I made more than 10 models with a KFM profile (according to the drawings of the authors) and then converted to a flat-convex profile, the models flew like heaven and earth. Make a wing for this model from 3mm foam with a plano-convex profile: the appearance of the model will become more replica and the rigidity of the wing will appear without adding weight. If a high speed is desirable for the model, make the plano-convex profile thinner. I tried the FM2. 3 profile for models flying in a non-motorized form from the slopes - they almost barely flew in the wind from 8m/sec. When modified to a flat convex profile, but thin, it was possible to fly without landing for several hours in a wind of 5 m/sec.A striking example is a Shark with a KFM4 profile : it really did not fly from any modeler. With a thin profile, this model flew...barely.

Thanks for the feedback. This would have been my first KFM wing. With all the hype I figured I might try something different.
So you are suggesting a shape like this smaller Balsa profile F/F model? This one had a lot of reflex. Should I consider Ribs on the undercamber side with no spar?

 

[Matthewdupreez]

Thanks for the feedback. This would have been my first KFM wing. With all the hype I figured I might try something different.
So you are suggesting a shape like this smaller Balsa profile F/F model? This one had a lot of reflex. Should I consider Ribs on the undercamber side with no spar?
View attachment 240081

kfm aerofoils fly really well,
i've done 5 custom designs now with kfm aeroils all of which flew fast, smoothly and well
defiantly a winner aerofoil for foamboard

 

[JClaude]

Big Stick is just about done. 1.7m wingspan from heavy UK foamboard. A big 5055 motor (580kv) turning a 15x10 prop on 6s (from two 3s 2200’s in parallel). Weight is I think around 2.5kg rtf - I’ll weigh it tomorrow before the maiden.
View attachment 239937

COOL! It seems that the foam board sheets sold in Europe are heavier, but perhaps also stronger. As an example, I built a FT Edge with these 5mm (2/10 in) thick plates, purchased in Belgium, and the total weight in flight order is close to 1kg (2 lbs). Do you confirm a noticeable weight difference?

 

[shadeyB]

Next project on the build table is looking gorgeous already
last edition to complete my V bomber fleet 😍
powered by twin FMS 64’s running 4s

 

[L Edge]

Thanks for the feedback. This would have been my first KFM wing. With all the hype I figured I might try something different.
So you are suggesting a shape like this smaller Balsa profile F/F model? This one had a lot of reflex. Should I consider Ribs on the undercamber side with no spar?
View attachment 240081

Since the battery will most likely be in the overhang section, make sure it is re-enforced stiff enough that a heavy landing doesn't snap off or bend the front section. I use balsa plank epoxied to material. It also works real well if you have to locate nose gear in overhang section.

 

[Brian B]

Since the battery will most likely be in the overhang section, make sure it is re-enforced stiff enough that a heavy landing doesn't snap off or bend the front section. I use balsa plank epoxied to material. It also works real well if you have to locate nose gear in overhang section.

Forewarned is forearmed. Thanks. It will be a belly lander, enhanced with a curved wire "skid" at the front of the intakes. Hopefully the battery will be just above that point, with just a canard servo in the main fuse. I'll first make the wing tips fixed, with the ability to expand to actuation later if it flys nice.

 

[Shurik-1960]

I continue to assemble the model for 1-2 hours a day. The glue is light, foams and dries for a long time. I check every detail on the spot.There are inconsistencies. I will make the wing with a symmetrical profile made of foam with a thickness of 3mm . In the center of the fuselage there will be a spar from the tip of the fishing rod, In my opinion - the author's design is not rigid enough. The wife, seeing the model, asked : Is this going to be a flying trough? . Now this model will be referred to as the flying trough-22.

 

[The Fopster]

COOL! It seems that the foam board sheets sold in Europe are heavier, but perhaps also stronger. As an example, I built a FT Edge with these 5mm (2/10 in) thick plates, purchased in Belgium, and the total weight in flight order is close to 1kg (2 lbs). Do you confirm a noticeable weight difference?

The foamboard I can get is double the weight of the FT stuff, but also much stronger. I don’t try making FT planes out of it, but in this larger size category (wingspan 1.7m) it works well.

 

[The Fopster]

The foamboard I can get is double the weight of the FT stuff, but also much stronger. I don’t try making FT planes out of it, but in this larger size category (wingspan 1.7m) it works well.

Here’s a 1.7m wingspan made from the heavy stuff (in process of being painted, plus it’s had one heavy crash already!). Built pretty much the same as a normal FT plane but bigger. Seems to work just fine but needs bigger motor, batteries etc.

 

[Timmy]

Next project on the build table is looking gorgeous already
last edition to complete my V bomber fleet 😍
powered by twin FMS 64’s running 4s
View attachment 240088

Jeez look at those jets in the background wowie!
I remember you posting build images of that vulcan like it was yesterday

 

[Shurik-1960]

I continue the assembly.The keel and elevator were glued together from two layers of foam 3mm thick, then ground with a skin to a thickness of 3-4mm. While the total weight of the fuselage is 160 grams.

DSC00005 hosted at ImgBB

Image DSC00005 hosted in ImgBB

ibb.co

DSC00006 hosted at ImgBB

Image DSC00006 hosted in ImgBB

ibb.co

 

[Tdugar]

Tdugar. I really liked this model made by Julius Perdan. I printed out the drawing yesterday and cut it out today. I decided to make this model , but in the process of construction I will do my own , based on previous experience . My goal is to make this model lighter without losing strength. I ask for advice: post a photo of model manufacturing in this topic or create a separate topic on the construction of the F-22 from Julius Peredan.Link to the website : https://paper-replika.com/index.php/rc-foam-project/f-22-raptor-rc-plane-plans . I will order the engine and servomechanisms during the construction process on aliexpress . Sheets of foam with a thickness of 5mm should arrive this week in the parcel.​

I made his SU-30 I love it.

 

[Tdugar]

I continue to assemble the model for 1-2 hours a day. The glue is light, foams and dries for a long time. I check every detail on the spot.There are inconsistencies. I will make the wing with a symmetrical profile made of foam with a thickness of 3mm . In the center of the fuselage there will be a spar from the tip of the fishing rod, In my opinion - the author's design is not rigid enough. The wife, seeing the model, asked : Is this going to be a flying trough? . Now this model will be referred to as the flying trough-22.

You gonna love it.

 

[Tdugar]

Love the F-22! Love the Dallas Cowboys even more!!!!!!!!!!!

Yessssss I appreciate it DC4L