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МЕ-262 1/4 fokkerc

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МЕ-262 1/4 fokkerc

Old 03-19-2021, 08:45 AM
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fokke
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Default МЕ-262 1/4 fokkerc

Hi guys , I start new project jet model for me in 1/4 scale.
The model is for two jet turbines any of them 100N

I start with the fuselage and this is my progres so far













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Old 03-19-2021, 11:44 AM
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Great project, I wish you every luck with it.

I had lunch with Eric Brown a few years ago,, Britain's greatest pilot, he had flown them ALL inc. the 262.

Asking Eric which was the best of WW 2 ? Mosquito, Spitfire, Mustang, Lancaster ?

No, he said, the Me 262. Jet engines, ( albet with short life and difficult handling) swept wings giving v high speed, and superb manouverability, a superb aircraft in many respects.

Look forward to your progress.
Old 03-19-2021, 12:53 PM
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fokke
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WOW , so interesting story ! Yes I think Ta-152 and Me 262 are best fighters for WW2 , The Ta -152 I made it , now I make this one.Thanks for the wishes
Old 03-19-2021, 06:34 PM
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Looking good.

Regards,
Old 03-19-2021, 06:41 PM
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In Eric Browns book he said the German HE 162 was his favorite flyer.
Old 03-21-2021, 07:54 AM
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fokke
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The tails is ready ! I have to write , that the construction of the model tail is like on the original , all ribs and stringers and their position !





Old 03-27-2021, 09:31 AM
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fokke
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I start with the wings , flaps , aileron



Old 04-02-2021, 06:02 AM
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Wing update




Old 04-16-2021, 08:41 AM
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Hy buys , we work in the model , almost ready is the engine area





Old 04-16-2021, 02:21 PM
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I would consider moving the engine aft into the tailcone

Reasons:
1. Thrust/efficency gain. EDF produce most thrust from ingested air. Straight jets mainly from expelled gasses. The less thrust tubes ect that there is in the way, the more efficiency you will reach (less friction losses). No need to route hot gases through areas where it should be cool.
2. Safety: less structural damage during startup or engine fires as flames directly exit airframe
3. Weight: not cg critical. Moving engines aft as far as feasible decreases weight of thrust tubes carried along
4. Engine exposure: engines sitting low to the ground. High risk of ingestion of FOD. Moving engines aft and adding obstacles adds safety to engine damage, as ingested obstacles will be deflected or loose path along the way.
5. Scale appearance: at 1/4 scale a 100N class turbine sitting in the intake looks weird.....

just my thoughts on the subject. In my avonds f15 i placed the engines right in the nozzles.....if the suckers want to spit fire (no pun intended) feel free
Old 04-16-2021, 02:25 PM
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Engines need to stay at the front. Otherwise you will be adding a lot of nose weight.
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Old 04-16-2021, 04:15 PM
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Originally Posted by NZjet View Post
Engines need to stay at the front. Otherwise you will be adding a lot of nose weight.
The full scale engine is about 3.8m long (sorry for metric). At 1/4 its just short of 95cm scale engine length. Presuming an average distance to exhaust/intake at around 10cm and an average engine length of about 25cm, will give about 50cm mounting range for cg of engine. Looking at the wing geometry the cg should be about mid-engine.....we are talking leverage of +/-25cm (under 1 foot) for a weight shift of (total for 2 engines) under 2kg (4.5lbs).
Fuselage geometry indicates weight can be mounted about 1m in front of cg.....estimating 250g per thrust tube indicates 500g of thrust tube weight total


Basic leverage math:
removing thrust tubes and mounting engines aft will require addition of 125g of lead in the nose. Yes. BUT you can remove 500g of thrust tubes. Overall you will gain 375g weight. Now by smartly rearranging your equipment you can eliminate the lead, fly lighter and have more thrust available......while gaining all the other advantages for free....

Last edited by Miniflyer; 04-16-2021 at 04:27 PM.
Old 04-16-2021, 11:49 PM
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fokke
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Originally Posted by Miniflyer View Post
The full scale engine is about 3.8m long (sorry for metric). At 1/4 its just short of 95cm scale engine length. Presuming an average distance to exhaust/intake at around 10cm and an average engine length of about 25cm, will give about 50cm mounting range for cg of engine. Looking at the wing geometry the cg should be about mid-engine.....we are talking leverage of +/-25cm (under 1 foot) for a weight shift of (total for 2 engines) under 2kg (4.5lbs).
Fuselage geometry indicates weight can be mounted about 1m in front of cg.....estimating 250g per thrust tube indicates 500g of thrust tube weight total


Basic leverage math:
removing thrust tubes and mounting engines aft will require addition of 125g of lead in the nose. Yes. BUT you can remove 500g of thrust tubes. Overall you will gain 375g weight. Now by smartly rearranging your equipment you can eliminate the lead, fly lighter and have more thrust available......while gaining all the other advantages for free....
Yes you are right , but the front position of the turbine is much much comfortable also in any cases I will have carbone fiber tubes in the wing , because the wing will be by three pieces in any cases .
The CG is also + in my desition.
Thank you very much for your very interesting and constructive posts !
Another one , Any builder who want to move the turbine back is free to make it , in the engine area have much space to move the jet where you want
Old 04-23-2021, 05:42 AM
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fokke
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Hi guys, here is our progress on ME-262 1/4 scale wing .








Old 04-23-2021, 07:02 AM
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Exceptional!! Cannot wait to see this airborne.
Old 04-23-2021, 09:15 AM
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Vincent
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Iíll take one !! I have 2 P100ís sitting on the shelf
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Old 08-24-2021, 03:57 AM
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fokke
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I am glad to introduce you the latest model in our garage - the legendary Messerschmitt ME-262 in 1/4 scale! The kit includes laser poplar plywood parts, balsa parts, PETG printed details and a lexan canopy. Of course, you will get a detailed, fine printed parts!

https://www.fokkerc.com/product/mess...6OJie2TWRuqs2o









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Old 08-24-2021, 08:12 AM
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yeahbaby
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Any progress with build?

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