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HomeAircraftFixed-WingMain Discussion › The official plank thread.
01-12-2011 08:56 AM  7 years agoPost 1621
Spitfire1

rrElite Veteran

Perth Australia

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This is the f16 version, almost the same, better demonstrates the flying performance, specialy the high alpha slow flight.

Actual flight starts at 3.20 minutes in.

Watch at YouTube

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01-12-2011 01:07 PM  7 years agoPost 1622
tzclark

rrNovice

Chilliwack British Columbia

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I know that's a extra, I forgot to delete that from a previous post in the quick gallery. The kit I just picked up is still a pile of twigs that needs to be whittled.

I would rather be in a boat, with a drink on the rocks, then in the drink, with a boat on the rocks!

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01-12-2011 02:55 PM  7 years agoPost 1623
koppter

rrApprentice

Virginia

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in that case, i'm just jealous. the laser has always been one of my favorite airplanes, classic in history and still a respectable flyer.
the lanier kit uses a lot of luan ply, which is very heavy. might consider replacing with lite ply and even routing some lightening holes.

http://www.icasfoundation.org/hall_fame/1998/leo_inverted.jpg

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01-13-2011 01:33 AM  7 years agoPost 1624
jwhitacre

rrKey Veteran

Tarentum,PA- US

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Ok I'm planning on using an eflite g110 gyro on my Cub Bee Sport. The purpose is to make life easier on our not so flat grass field Should I use 2 pieces of gyro tape under it to minimize vibrations? I've only used cheap gyros on sailplanes and electric planes, not on a nitro.

Depleting the world of parts, one crash at a time!!

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01-13-2011 02:05 AM  7 years agoPost 1625
airboss

rrElite Veteran

OC ,california

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the cheap gyros work fine in planes. be carefull of HH mode.

Urukay HPS3 KSE 700 HPS3

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01-13-2011 03:02 AM  7 years agoPost 1626
tzclark

rrNovice

Chilliwack British Columbia

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koppter, I will start assembling this weekend, thats a good looking laser! I have seen the site showing how to lighten the fuse, so ill go ahead and do that, there is a site that i cant seem to find again showing how to reinforce the tail without using the supports.

I am not really a fan of the looks of the laser but I really enjoy the building. I was thinking of doing the breitling cap scheme. ill post my progress.

I would rather be in a boat, with a drink on the rocks, then in the drink, with a boat on the rocks!

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01-13-2011 03:48 AM  7 years agoPost 1627
jwhitacre

rrKey Veteran

Tarentum,PA- US

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the cheap gyros work fine in planes. be carefull of HH mode.
Cool, good to know. I have only used them in rate mode, I would imagine hh mode would make turns difficult.

Depleting the world of parts, one crash at a time!!

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01-13-2011 06:35 AM  7 years agoPost 1628
koppter

rrApprentice

Virginia

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tz...it's kinda sacrilege not to build it without the tail wires as they are part of the full scale design and have a certain "look" that is gone with today's composite aerobats. i haven't seen the site you describe, but it would probably entail sheeting the stab, and using hardwood for a additional spar in the stab, or balsa with a cf reinforcement. Probably not too hard to do. I would be interested in seeing build pix.

http://farm4.static.flickr.com/3238/2973880498_5d07e1f3fa.jpg

Paul

i would rather have a bottle in front of me, than a frontal lobotomy.

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01-14-2011 01:41 AM  7 years agoPost 1629
tryan02

rrProfessor

Canton, Missouri

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Spitfire I hate you and your EDF fetish you know this really bothers weak minded people?

Much like myself I ordered me one of these from hobby king $93.
Could be the biggest waste of a $100 dollar bill but there is really only one way to tell


Watch at YouTube

No Really I am the club President!!!

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01-14-2011 03:06 AM  7 years agoPost 1630
Spitfire1

rrElite Veteran

Perth Australia

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There good cheap fun eh!

Should grab one of there $7.95 receivers to go in it.

Check the fan doesent rub inside the fan houseing, the foam hatch if screwed on too tight can press against the housing, I kept backing the screws off until it was nearly completely free, if it slightly rubs it will be OK and wear in after the first couple of runs.

(its good practice to run the fan at 1/4 throttle for a minute or so before going to full stick to wear the fan in, maybe 40 seconds at half throttle, then a few quik jabs of full throttle.)

Its also a good idea to remove the fan and check for loctite, but I havent bothered Il just takes me chances on this one.

Be careful with CG, I found there so small even haveing the deans plugs infront of the lipo or behind can cause the plane to be tail heavy or nose heavy (by an unflyable amount)

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01-14-2011 03:50 AM  7 years agoPost 1631
tryan02

rrProfessor

Canton, Missouri

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I read the sabre jet is always tailheavy I was just gonna mark CG and go to the local hobby store and try batts till I get one that works. unfortunately I have 3 800mah 20c just sitting around I may add a bit of weight to them just so I can use them.

So are you saying CG needs to be dead on? I always lean towards nose heavy I like them to fall nose down when the power drops not tail down. Especially for hand launching a little nose down is usually better than nose up.

Any way this will fill my jet fetish I have been dealing with for over a year now.

No Really I am the club President!!!

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01-14-2011 04:23 AM  7 years agoPost 1632
Spitfire1

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Perth Australia

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I notice alot of plane guys do tend to lean towards nose heavy for safety, I think with such a small jet maybe good to get it as close as possible without being tail heavy, I would not delibrately make it slightly nose heavy.

I think you can play around with the CG a bit if you want, but its just that first maiden flight is scary enough without any more added problems, from what Ive been reading these little jets are surpriseingly easy to fly, even good for a first edf.

Everything seems to be working OK so far with my one, I spooled the fan up to 100% for a minute or so and it seems fine, when I moved it by hand it did slightly rub the fanshroud, but cant hear any bad noise when its running, Im not going to change anything not even the servos.

Ive been reading the forums and Ive yet to hear anyone complaining about burnt out motors or explodeing fans e.t.c on there second flight, which is unusual for these things, also surpriseingly its a little outrunner motor not an in runner, I dont know what KV.

I would suggest just unscrewing the foam fan cover before you fly and haveing a quik look over the fan to make sure its not loose or anything obviously wrong, I think it may be have a bit of glue to hold it in the plane so I did not want to try and yank it out damageing the foam, if I hear any odd noises after the first flight Il pull it out and check everything for loctite.

In my experience with these kind of things so far its not good to launch at full throttle, half to 3/4 throttle and just be ready to give it full if needed, and maybe throw it 20 - 30 degrees upward, Ive found at full throttle they tend to dip on launch, if there anything like the little f35 I had which I suspect they are, full throttle has quite a kick, there more powerful and fast than you expect for a little toy so be ready for a white knuckle thrill ride.

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01-14-2011 06:15 AM  7 years agoPost 1633
Spitfire1

rrElite Veteran

Perth Australia

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Dont know if you noticed but they also have replacement airframes in the replacement section for $18.95

http://www.hobbycity.com/hobbycity/...idProduct=12864

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01-14-2011 10:20 PM  7 years agoPost 1634
tryan02

rrProfessor

Canton, Missouri

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Dont know if you noticed but they also have replacement airframes in the replacement section for $18.95
Thats what made them so appealing if it dont work I can replace everything bigger motor and use a little 4S pack. For pennies on the dollar compared to the Eflite EDF planes.

If it dont work out but it looks like it should. My second plan was to order the $20 shell and put good stuff in it.

I still dont understand the Full throttle dip though? doesnt make sense to a old planker like myself. I will go throw my shop vac and see how it reacts.

Oh as for the nose heavy prop plane it only makes sense the nose drops ever so slightly when you kill the throttle keeping forward speed. and desensitizes the tail ever so slightly for smooth tail control instead of eratic tail snaps. Unless you want a hot 3D plane then do just the opposite.

No Really I am the club President!!!

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01-14-2011 10:36 PM  7 years agoPost 1635
tryan02

rrProfessor

Canton, Missouri

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Oh and for the receiver well I am a Futaba man no little $7 HK spektrum RX for me. I am gonna put a $100 RX in a $59 dollar plane.

But I know people who are using the el cheapo RX and they are working flawlessly. So Far.

No Really I am the club President!!!

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01-15-2011 12:40 AM  7 years agoPost 1636
tryan02

rrProfessor

Canton, Missouri

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OK I am pretty skilled at hand launching prop foamies is an EDF really any different? Well specifically the little 50mm 1 pound EDF I was assuming it would be about like launching a parkzone trojan looks like the thrust to weight is pretty good on these guy's.

Toss it forward flat then fly it out?

Watch at YouTube

No Really I am the club President!!!

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01-15-2011 03:21 AM  7 years agoPost 1637
Spitfire1

rrElite Veteran

Perth Australia

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That inverted launch was impressive.

I dont think the edf should be any different to the other planes.

I dont know what the go is with launching at full throttle, Ive heard lots of other people bring it up so its not just me, may last small edf would dive on launch at full throttle, even if you did a very slow low level pass at 1/4 throttle and hit full throttle to fast it would lurch downward, I havent been able to fly this one yet but it looks very similar to my last little one that was a freewing f35.

My guess is it has something to do with these smaller jets haveing close to a 1:1 power to weight ratio (sometimes more) that kicks the ass when you dump to much throttle all at once from a dead start, Ive also read they have slight downthrust, but Im not realy sure, just have to see how these little ones go, hopefuly there easier to launch.

The way the weather is here its likely you will have flown yours before I fly my one, maybe today the wind will stop hopefuly but unlikely.

It seems to me the most important thing is to make sure you keep the wings level when it leaves your hand.

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01-15-2011 03:56 AM  7 years agoPost 1638
Spitfire1

rrElite Veteran

Perth Australia

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Strangely my 50 size su26 I recently found out its slightly noseheavy yet I was able to hover that fine (due to battery limitations I cant get any more weight backwards), I have delibrately made other my 50 size MX2 considerably tail heavy in the hope it would be easier to hover but so far it just dont feel right, I think it may be a pschycological thing.

I was hovering my su26 fine before I new it was nose heavy, but since getting access to a proper balanceing machine and finding out its actualy nose heavy Ive been worried about hovering it, I havent had chance to fly it since I was made aware it was nose heavy, so will be interesting next time I fly it if I can still hover OK, nothing has changed since I last flew it and I was able to hover it OK then, and it also seemed to harrier OK even though I now know it is slightly nose heavy.

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01-15-2011 02:50 PM  7 years agoPost 1639
tryan02

rrProfessor

Canton, Missouri

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I have never taken CG too seriously other than a fingertip on each wing and let the nose dip forward and call it good. And on a good day I can hover my Taylorcraft if it doesnt run out of power hard to lift a 15lb plane with a 26cc gas engine.
The way the weather is here its likely you will have flown yours before I fly my one, maybe today the wind will stop hopefuly but unlikely.
I doubt it winter here bud or as I think you guy's say mate?

20 or -7 degree's for a high and a foot of snow on the runways.

No Really I am the club President!!!

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01-15-2011 04:49 PM  7 years agoPost 1640
koppter

rrApprentice

Virginia

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spit, what do you mean "slightly nose heavy?" how are you determining CG?

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 113 pages [ <<    <     80      81     ( 82 )     83      84     NEXT    >> ] 100515 views POST REPLY
HomeAircraftFixed-WingMain Discussion › The official plank thread.
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