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AKM SU-27 Flanker-Does Look Good

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AKM SU-27 Flanker-Does Look Good

Old 04-29-2005, 02:40 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

Rossi's are built to last... they are not light.

However, his DF engine is rear exhaust and will require a pipe of some sort... that pipe will be further backwards than a muffler on a side exhaust engine. So it might not end up so bad after all.
But if you need tail weight with your Evo, than he will need the same with the Rossi IMO.
Old 05-02-2005, 07:55 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

Thanks for the info on the canopy, I was sure you probably sprayed it from the inside but I didn't want to screw mine up experimenting. I never thought about vent holes great idea, I am for sure going to make mine black, now if I could just get time to cover it.
Old 05-03-2005, 07:35 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

My wife is taking the Rossi to work so she can weight it. I will let you know how much more it is than a JETT and the Evo. I don't think that the Tuned pip will make that big of a difference since they are SO Light now days.
Old 05-03-2005, 09:25 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

I am still wondering if anyone has installed the OLEO's for the SpingAir retracts? I am wondering how they fit, both width and length.
Old 05-03-2005, 09:59 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

Oleos might be tough on this bird. The gear geometry is not "square" like a pattern ship or P-51 - retracts at an odd angle - so you would require some custom strut/axil assemblies. Maybe someone has constructed something like this already ?
Old 05-03-2005, 08:02 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

At the angle the main retracts are mounted, won't the wheels just end up a little canted in the wheel wells...? The same thing would happen with wire struts, wouldn't it?
Old 05-03-2005, 08:10 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

Save the Weight.... Just use the 3/16" wires. especially if you fly off grass. My wires now have a comfortable bend aft from the friction imposed by the grass. You want the strut to flex and absorb the shock of landing.... the oleos will not do that! If the strut does not bend the the gear mount will take all the load and will shear off easier!

Just my opinion!

Rich
Old 05-04-2005, 08:33 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

Good post Rich. I agree with that. Wires usually have worked better for me on grass. As long as the wires are made from good music wire, and not the soft coat hanger type stuff common with 'eastern' products

Rude...... the geometry is kinda weird. Retracted position is somewhat of a fall-out of the extend position. The main issue is that the axil is not 90deg to the extended gear leg. I am not sure if spring air or robart have struts where the axil camber can be adjusted or changed - most I have used or seen were fixed at 90 deg. (although, there are some r/c jet landing gear with geometry that might work well)

Hopefully Alex's kits will eventually garner enough market share where spring air might make special retract/strut package for the plane.
Old 05-04-2005, 10:07 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

Thanks Bob, I did not think about the axle position. That would appear to be a potential problem. Difinately would require larger openings and more oil inside the retract area. I think i will just stay with the wires for now. I fly off of pavement, a nice 60' x 500' runway. However there is the occasional rough grass landing, oops.
Old 05-05-2005, 09:51 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

The weight of the Jett 90L is 24.6 oz. Does this include muffler?

The weight of my Rossi 90 is 29.2 oz/not including tuned pipe.

Hopefully the engine will not be two heavy.

Is a 12" prop to big for this model?
Old 05-05-2005, 11:08 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

I have and will use a 14x6 MAS K series prop on mine for the test flight with lots of ground clearance.
Old 05-05-2005, 11:20 AM
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Default RE: AKM SU-27 Flanker-Does Look Good


ORIGINAL: magnumeng

The weight of the Jett 90L is 24.6 oz. Does this include muffler?

The weight of my Rossi 90 is 29.2 oz/not including tuned pipe.

Hopefully the engine will not be two heavy.

Is a 12" prop to big for this model?

Just checked on this... sometimes we get some weight creep. I know the muffler weighs a few grams more than the did a few years ago. I have to do an increimental update on the web site to make sure I account for everything.

SJ-90L ABC with muffler and spinner nut, ready to install, is 26.1 oz.
With the 2.25" spinner installed, it weighs 27.7 oz.
The AAC version is one ounce ligher at just about 25 oz. (the 24.6 was for AAC configuration, so thats still fairly accurate)
The engine alone should be right at 20oz.

An OS 91FX with muffler is 26.2 ounces for comparison

The surprise here was the BSE-90L - just weighed in a a porkin 28 oz. Ouch! The first prototype was only 26.8. A few little design improvements add up over time. EEhh.. no matter

A 12x6 prop is perfect for the SU-27. Ask Rich for the the link to his flight video.

The Jett 90L can run with pretty much any size prop from 10x9 up to 13x6, as long as you hit the rpm target window. The baseline prop is an APC 12x6.

You should be able to use your Rossi 90 in there. It will just take some serious pre-planning and addition of some weight in the aft-end during construction to accomodate the added weight up front.

I hope this is helpful.
Old 05-05-2005, 07:12 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

Be careful Bob, you may accidently create new termonology. "Weight Creep" Thats a good one! Some poor slob is having problems balancing his plane. You might have "weight creep."

Yeh I 'm still here.
Old 05-05-2005, 09:09 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

I intended to build an 8 pound plane... it ended up at 10 pounds... "weight creep"

The SJ90 L"X" should be lighter though... since the muffler is shorter and the exhaust port is taller...
Old 05-05-2005, 10:20 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

Your Flanker final weight is 10 Lbs Rudeboy?
Old 05-05-2005, 11:53 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

Snoop,

How is the glass job? Are you glad you did it? What is your final weight? I am debating on how to cover my Flanker. I would really like to glass it using the same method you used. I figure it will last forever and look great. I have done many motorcycle glass repairs, I raced for years. Was it difficult? Post some pictures.
Old 05-06-2005, 07:47 AM
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Default RE: AKM SU-27 Flanker-Does Look Good


ORIGINAL: Rudeboy

I intended to build an 8 pound plane... it ended up at 10 pounds... "weight creep"

The SJ90 L"X" should be lighter though... since the muffler is shorter and the exhaust port is taller...
Yeah ... you are right. The 90LX muffler is probably 1/4oz lighter or so - its about 1" shorter.
Old 05-06-2005, 08:29 AM
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Default RE: AKM SU-27 Flanker-Does Look Good


ORIGINAL: Blade47

Your Flanker final weight is 10 Lbs Rudeboy?
My Flanker isn't finished yet, it was just a general statement in reply to to the weight creep thing.
I just bought a heli... it may take a while before the Flanker gets airborne...
Old 05-06-2005, 08:43 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

Oh....lol...was thinking after .... geezs what did he put on that thing ..mini guns ... lol
Old 05-08-2005, 08:54 AM
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Default RE: AKM SU-27 Flanker-Does Look Good

Well they both made it to the field this weekend to have there new Evos ran up ..oh... what a sweet engine may get a chance today put them both into the air for a test flight.

For the ones that would like to read about the Evo engine here is a thread that others/me are posting running information on.

http://www.rcuniverse.com/forum/m_28...tm.htm#2806624

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Old 05-08-2005, 04:37 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

You have a SWEET view at your field... what is your elevation?

Rich
Old 05-08-2005, 07:26 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

We are at 2350' and it great view for sure ... I did get to test fly the MIG today and have had a beer to many to give a report BUT..... IT was GREAT for sure .....more beer now ...report later..... .... NEXT weekend the SU for sure ...[8D]
Old 05-08-2005, 09:29 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

nice.... dont drink and fly!![sm=thumbup.gif]
Old 05-09-2005, 01:41 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

After building my wings, I attached them to the fuse and have noticed a small gap at the leading edge of one wing and the trailing edge of the other. About an 1/8 of an inch. It appears that I may have miss aligned the holes for the aluminum rod ever so slightly. I was surprised because I really thought I had everything perfect. I have checked on the plans and it does appear that the rod is out of alignment. Also my rod is a little bent, it wobbles when roled. Has anyone had this problem and how did you fix it? Alex suggested building another W1 and shaping to adjust for the gap. SHould I just bend the rod slightly to remove the gap?
Old 05-09-2005, 01:53 PM
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Default RE: AKM SU-27 Flanker-Does Look Good

I would try a straight rod first ...you can buy the aluminum tubing from your hardware store.... with a know-en straight rod try your wings again to see what you have.. I don't think I would want to bend the rod to match the wing as you would have to mark it well so that it would fit into place each time you put the wing back on.. It may be best to redo both W1's

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