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Post  MauricioB Sun Dec 27, 2020 7:37 am

Well as the title says I will start with the assembly of this beautiful model.
It will have an O.S. .70 4-stroke.
4-stroke engines are another mechanical marvel, beautiful to enjoy ... both their ride and sound are truly spectacular.
I will share here the assembly of the F1 Rocket EVO ... Santa
F1-Rocket EVO by Great Planes. Gpma1010

O.S. .70 4T
F1-Rocket EVO by Great Planes. Dsc07010
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Post  balogh Sun Dec 27, 2020 10:48 am

I have just cleaned up my 2 OS MAX FS 56 alpha engines that have been sitting around in my larger planes that I cannot easily find the airfield for..the castor goo has almost cemented the rocker arms and the arm lifter rods. One needs to use more synt and less castor in the fuel of the 4-strokers.
I am looking forward to following your project Mauricio.
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Post  MauricioB Sun Dec 27, 2020 11:18 am

Dear friend András, thank you again for accompanying us on this virtual trip!
Hopefully one day I can meet you and shake our hands!
Regarding the engine, this is an engine that I bought second hand and I did maintenance on it.
Castor oil is very good, in my experience synthetic is very clean, but the combination of the two is what really works and although some fuels reach 18%, I modify them by taking them to 20% lubricating oil, then, for a 4T 20% is ideal.
Here are the photos of the maintenance of the O.S. .70 4T. what did I do.

F1-Rocket EVO by Great Planes. Dsc06910
F1-Rocket EVO by Great Planes. Dsc06911
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F1-Rocket EVO by Great Planes. Dsc07014
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F1-Rocket EVO by Great Planes. Dsc07030
F1-Rocket EVO by Great Planes. Dsc07031
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Post  balogh Sun Dec 27, 2020 11:31 am

Like always, you did a great job Mauricio..that engine must have sat for long, allowing the internals to corrode..very little soot in the cylinder and on piston top indicates the use if synt oil by the previous owner..my OS had a totally sooted piston top and engine head when I disassembled it for cleaning, thanks to all-castor lubrication. ( I have used home blended COX fuel with 20% castor, and given the much higher compression ratio and combustion temperature in the OS FS than in a COX engine, a great part of castor burns and blackens the engine internals)

Nitro leaves behind water condensed on bearings, leading to corrosion..I am wondering why the steel crankshaft of COX engines do not rust as quick as the ball bearings of 4-strokers?
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Post  davidll1984 Sun Dec 27, 2020 11:47 am

Nice job like new Thumbs Up y tink cox wil rust les du To its smal crank case volume iternal size spi open exaust port welp dry moistur water left inside dry faster than closed engine wit bearing wit lots room for water To stay trap long and make parts rust wit time is wy y place m'y engines exaust port open after use bether dust litle than rust inside
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Post  balogh Sun Dec 27, 2020 11:50 am

Thanks Dave yes your assumption i.e. less volume of condensed water left in contact with the COX crankshaft will cause less corrosion makes sense.
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Post  MauricioB Sun Dec 27, 2020 10:12 pm

RC Plane Well, today I flew my models with 4-stroke engines and they are undoubtedly a pleasure in many respects. Here is a flight video with my Yak 55 M from Great Planes converted to Glow. RC Plane
F1-Rocket EVO by Great Planes. B9d85110
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Post  getback Mon Dec 28, 2020 5:49 am

Nice job on the rebuild came out looking Great !! The Yak 55 M flies gracefully through the paces , enjoyed the vid , Did you run the rebuild surpass 70 ? I have a OS 46-46 ? four stroke i don't remember if it has been run but hope its good inside . Rudolph
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Post  balogh Mon Dec 28, 2020 9:53 am

Great flight Mauricio..I wish I could fly my Denight 50 with one of the OS FS56 engines I have..I love the sound and brute power of that engine. Very stable and low rpm idle too.

My Denight 50 is a bit nose heavy and tends to flip over after landing even if I keep a full elevator up when taxiing. Will change its running gear to a longer than stock so as to make it more stable while taxiing on uneven terrain.
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Post  MauricioB Mon Dec 28, 2020 9:54 am

@getback wrote:Nice job on the rebuild came out looking Great !! The Yak 55 M flies gracefully through the paces , enjoyed the vid , Did you run the rebuild surpass 70 ? I have a OS 46-46 ? four stroke i don't remember if it has been run but hope its good inside . Rudolph
Friend Eric !! .... yes I have started the O.S. .70 4T and it is a beast !! ... beautiful engine ... I will be showing the assembly steps of the model and we will be able to see it work.
Hey, is it possible that your engine is a .48 4T ?? .... it would be nice if you put some photos, it is always nice to see engines.
Well, don't worry, just remove the rear cover and its carburetor and you will be able to see there the state of the rear bearing and crankshaft, if something is not right, you will notice it there immediately! Old Bugger
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Post  MauricioB Mon Dec 28, 2020 8:53 pm

.. and here is a video of the O.S. FS .20 4T.
Another mechanical marvel Very Happy .
I hope you enjoy the video ...
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Post  MauricioB Tue Dec 29, 2020 8:14 am

Well, I start with the modification of the cockpit, because the pilot is relatively to scale in this model, but it turns out that in static I see it located very forward, so I decided to take it a few centimeters further back to give another general aesthetic.
I have also printed a board (since this kit does not bring it), the board is a copy of the Yak 55M board from its Great Planes brother and it really fits perfect.
For this I have built a wooden support and it is hollow, something to lighten everything.
I have also decided to change the background color, since it comes in a gray tone, I like the black color better for this sector, leaving the cabin much more elegant ... here are some images.
F1-Rocket EVO by Great Planes. Dsc04624
F1-Rocket EVO by Great Planes. Dsc04625
F1-Rocket EVO by Great Planes. Dsc04626
F1-Rocket EVO by Great Planes. Dsc04627
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F1-Rocket EVO by Great Planes. Dsc04630
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F1-Rocket EVO by Great Planes. Dsc04632
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F1-Rocket EVO by Great Planes. Dsc04639
F1-Rocket EVO by Great Planes. Dsc04640
F1-Rocket EVO by Great Planes. Dsc04641
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Post  davidll1984 Wed Dec 30, 2020 4:49 am

Good scale upgrades 4stroke sound Good like the vidéo of the yak 55 Thumbs Up
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Post  MauricioB Fri Jan 01, 2021 12:11 pm

Well, I have done a review with the heat iron for all the decorations and monokoteado (draped with monokote) of the model. You have to be very careful when doing this work, since any line may be deflected, the decoration or fabric can be a visible problem.
F1-Rocket EVO by Great Planes. Dsc04642
F1-Rocket EVO by Great Planes. Dsc04643
After this, then I started with the installation of the servos and aileron controls, here are photos...
F1-Rocket EVO by Great Planes. Dsc04644
F1-Rocket EVO by Great Planes. Dsc04645
F1-Rocket EVO by Great Planes. Dsc04646
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F1-Rocket EVO by Great Planes. Dsc04650
F1-Rocket EVO by Great Planes. Dsc04651
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F1-Rocket EVO by Great Planes. Dsc04653
F1-Rocket EVO by Great Planes. Dsc04654
F1-Rocket EVO by Great Planes. Dsc04655
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Post  MauricioB Fri Jan 01, 2021 12:14 pm

With the aileron servos installed on the half wings, then I will continue with the process of gluing the parts together with the stress bayonet.
F1-Rocket EVO by Great Planes. Dsc04656
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Post  nico010 Sat Jan 02, 2021 8:51 am

mauri ... very good job as always.
I would like to ask you how you have cleaned the engine to make it look like new. Looking at the final photos and without having seen the dirty parts, this engine would look like it was right out of the box.
again congratulations on the quality of the work.
a big greeting to you and all the members of the forum in this 2021.
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Post  MauricioB Sat Jan 02, 2021 9:37 am

Thanks nico010
The liquid that I use to clean these engines is automobile coolant containing ethylene glycol, you must be very careful with this product, namely, the vapor that it gives off attacks health and if liquid is spilled on the fire flame, everything can catch fire, for this reason you must be very careful in the procedure.
Steps:
You should heat the coolant in a ventilated place or better in the open air.
You must have control of possible spillage.
You should have a fire extinguisher or a damp cloth to smother the fire in the event of an accident.
Once the coolant reaches the boiling temperature, you must submerge all the parts of your engine for 30 minutes, then extract it and you must brush with a plastic or bronze brush, the dirty parts. You will quickly notice the cleanliness of the parts.
You can repeat the operation in case of doubtfulness.
This liquid does not attack plastics or rubber, so the oring and plastics, if they exist, will not be damaged.
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Post  Levent Suberk Sat Jan 02, 2021 11:04 am

Perfect work, very good craftsmanship as always Very Happy
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Post  MauricioB Sat Jan 02, 2021 11:36 am

Thank you very much dear friend Levent !! Beer Cheers
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Post  MauricioB Sat Jan 02, 2021 11:47 am

ok, I have already put epoxy on the central bayonet and its halves, now it is time for the glue to cure, in the meantime I will continue with the fuselage...
F1-Rocket EVO by Great Planes. Dsc04657
F1-Rocket EVO by Great Planes. Dsc04658
The drawer that holds the motor, from the manual indicates to place the bench directly, but in my experience, I consider it very good to place fiberglass and epoxy, so that nothing detaches or disassembles by the engine running process here is the placement of the fiberglass.
F1-Rocket EVO by Great Planes. Dsc04659
F1-Rocket EVO by Great Planes. Dsc04660
F1-Rocket EVO by Great Planes. Dsc04661
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F1-Rocket EVO by Great Planes. Dsc04663
After gluing the fiber with the resin, plastic adhesive tape is placed to compress the whole assembly so that the fiberglass perfectly copies the structure of the box ...
F1-Rocket EVO by Great Planes. Dsc04664
Now it is time to cure that part of the box that supports the motor ...
F1-Rocket EVO by Great Planes. Dsc04665
Going over the socket joints with epoxy can improve safety, since many of these models arrive poorly in glue, that is, from the factory some parts may notice that there is no glue.
F1-Rocket EVO by Great Planes. Dsc04666


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Post  MauricioB Sun Jan 03, 2021 12:10 am

After the epoxy has cured, I remove the plastic tape and sand the surface to dust some rough edges ... after that process is finished, I apply epoxy again and everything is there without being noticed, that is, an extra invisible and neat reinforcement! Eyebrows
F1-Rocket EVO by Great Planes. Dsc04667
F1-Rocket EVO by Great Planes. Dsc04668
F1-Rocket EVO by Great Planes. Dsc04669
F1-Rocket EVO by Great Planes. Dsc04670
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Post  balogh Sun Jan 03, 2021 1:21 am

Plenty of good tips, Mauricio, with the epoxy reinforcement. Do you also apply it not only on the engine firewall, but on the root of the box that is attached to the fuselage?
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Post  getback Sun Jan 03, 2021 5:30 am

Excellent work Mauricio , i have never seen the way you wrap the epoxy / glass with the black tape i would have thought it would have stuck to it . Very clean and strong too .
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Post  MauricioB Sun Jan 03, 2021 11:50 am

@balogh wrote:Plenty of good tips, Mauricio, with the epoxy reinforcement. Do you also apply it not only on the engine firewall, but on the root of the box that is attached to the fuselage?

A = all these pieces are integral, they cross the F1, therefore it is not necessary to place fiberglass at the intersection or root of the same with the F1, in addition to existing triangular wood indicated with green arrows, which makes the whole set is extremely strong.
The fiberglass is applied in sectors indicated with red color.
F1-Rocket EVO by Great Planes. Dsc04671
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Post  MauricioB Sun Jan 03, 2021 12:01 pm

Now I have placed a piece of monokote in the central sector of the wing, this is to give a better appearance, and prevent fuel from penetrating into the sector over time.
From the original manufacturer's manual they do not indicate to place anything, but if you find something similar, close the sector and you will avoid problems over time!
F1-Rocket EVO by Great Planes. Dsc04711
F1-Rocket EVO by Great Planes. Dsc04712
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F1-Rocket EVO by Great Planes. Dsc04714
F1-Rocket EVO by Great Planes. Dsc04715
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