and i did. here some spec on the original jet which if any of u who are interested can browse it further here.
Sukhoi Su-37 Super Flanker Park Jet by jetset44 (steve schumate) - rcgroups.
Wing area: 290 sq in
Span: 30.0”
Length: 36.3”
Weight RTF: 22 to 28 oz
Wing loading: 11 to 14 oz/sq ft
Motor: Two Littlescreamers Park Jet (LSPJ)
Battery: Thunder Power 2100 mAh 11.1V Prolite
Prop: APC 6x4 regular and pusher (counter-rotating props)
Current: 36 amps total
Watts: 350 watts total
Power loading: 220 watts/lb
Speed control: Two Castle Creations Thunderbird 18 or Phoenix 25 ESCs
Receiver: Berg 7P
Flight controls: Stabilators (tailerons), rudder (optional), thrust vectoring (optional)
* Canard or no canard – The plans show all the modifications required to convert this Su-37 to one of the original non-canard Su-27 or Su-30 variants. All that's required is to delete the canard, install a modified strake and modify the vertical tail. The changes required to do this are shown in red on the plans.
* Twin motors or single motor – This design can be easily adapted for a single centerline motor, which could be done with or without thrust vectoring (in this case it would be single-axis or pitch only). Note the upcoming Littlescreamers Super Park Jet Special motor would be an excellent motor for a single-motor version. The changes required to do this are also shown on the plans.
* With or without thrust vectoring – The TV system provides amazing maneuverability on this model but also adds quite a bit of weight, cost and complexity. For those that want a simpler version, this model can be built without the TV system and will still be a great-flying park jet. Another option would be to simplify the TV system by slaving the TV and stabilators together mechanically to eliminate the need for one pair of servos and a lot of complex transmitter programming. I'll describe the TV system in more detail in the next post.
* Flight controls – There are a wide range of flight control options on this model. To actuate everything (stabilators, flaperons, rudders, canard, thrust vectoring, throttles) would require 9 channels and up to 8 servos! But on the other hand, this model could be flown just fine using tailerons only—3 channels and 2 servos. The setup on my model is in the middle, with tailerons, rudder, thrust vectoring, and twin throttles, for 7 channels and 5 servos. I'll describe the flight controls and mixes required in more detail in a subsequent post.
my version of sukhoi su-37 super flanker park jet.
the original plan is intended for 6mm depron. however i end up buying a 5mm from my nearest art store and that all they have. for starters, i decided to go for the 28" span version. with single motor w/o thrust vectoring, stabilators and flaperons. as that what i saw fit my current 7cap. end up using 4 servos, one for each control surface.
so far, just finished painting it to my choice of color scheme.
however not yet planning on maiden flight, as still waiting for the proper power plant. i prep her with apex 450 2500kv blm with apc 6x4 and supersimple 40a esc from slumberjerrc. the problem is, i dont have the bty that can support the amp that requires by this motor. at least i think i would need 2200mah 20c to make it work. since i've got no more budget for the build this month, got to wait for the maiden flight.
Build record
since i dont have access to any 36" printer, so i need to print the tiled plan on a4 paper and put it togather.
here is how it came out after all the taping. i taped a layer of clear packing tape on the plan to make it harder when i cut all the tamplates so it can be used again if im planning to.
tamplates ready for tracing on to depron. all parts fits on 1 3x4 depron and 1 2x3 depron with some extras.
dry fits all the parts. i love how it came out to be just like solving a jigsaw puzzle.
spars epoxied into place. same as the motor mount. got to improvise on some aspect.
underside of my 30% finished su. im using uhu por to put togather most of the parts.
nose con and canopy shaped from laminated pieces. used 3m 77 super for the job. canard and ailerons fitted.
finished fitting all the parts. those white spots are spakles, used to cover holes. smoth up with sand paper.
i used white emulsion paint as the primer. helps in covering the small holes.
all electronics fitted. u can see the controls in there. need some mixing to make it works.
finished. front.
finished. back.
finished. top.
update 1/10/09 :
seems like i did it again. i maidened my sukhoi with apex 450 2500kv blm with apc 6x4 and a 2200mAh 25C. auw end up 950g, and yet i still decided to maiden it. got 2sec of flight time. land on its belly with some minor damage. the night before i tested for thrust and roughly im getting about 750g of thrust on that setting at 22A. so, lesson learned. dont fly under power. should fix landing gear for my next maiden. maybe try a lower kv blm.
update 1/15/09:
well, after an hour a day of work, i manage to put it all togather. this time with landing gears fixed. scheduled remaiden on this weekend with 2000kv apc 7x4 after i check the amp draw. hope this will do. if it gonna crash, at least let me get the video of its flying first :)
update 1/17/09 :
schedule remaiden postponed due to windy condition. maybe next week will try again. don't wanna crash it because of the wind.
update 1/28/09 :
still dont have a chance for remaiden. hope i can make it this saturday morning. with nowdays windy condition, its hard to make a maiden flight. if i still cant make it to fly, i might call it to be grounded and save it just for display. weight really matters in assuring a successfull build. looks like i learned it the hard way. on the other thoughts, this is my first depron build, so mistakes are eminent. im thinking of building a smaller version of it, maybe 80% of the original plan. if so, i'll try to make it as light as i can. one more thing, i'll make sure it fly first before putting on the paint. :)
update 2/1/09 :
today i said to myself, i got to make her fly today. this is how she look before.
with two failed take off attemp due to landing gear failure,i decide to hand launch it. know what, she made it. she finally flies. it makes me the happiest man on earth today. but i got into a little mishap at the end of the flight, pilot error. she landed on a tree. this is how she look after.
im thinking of building a new one from scratch. because dont wanna add more weight by glueing it back togather.
here's my setup by the time she has a successful remaiden:
span : 28"
auw : 850"
motor : APEX 2000kv + APC 7x5
battery : 11.1v 2200mAh 25C
thanx for supporting guys by reading, commenting my post.
update 2/4/09 :
answering to hang tuah question. im using pelaka poster color for the paint. i get myself yellow, black n white for this color scheme. mix black n white to get gray in different tone. rm3.80 ... soooo cheap n still looks good. just apply it right away without thining it with water.
before painting, i used some light putty to filled any visible hole. then sand it flat.
put a light coat of clear spray on top of the paint. make sure u dont hit unpainted area, as it would melt the foam.
thanx hang tuah for bringing it up.
updated 2/7/09:
today went to bmnf for my 20" span su-37 maiden flight. yeah its small compare to previous 28". i scale down the plan as im thinking it will be lighter and wont post any weight problem. but on second though, by scaling the plan, im also scaling the wing area. so now im facing an aircraft with wingloading of somewhere between 20 - 22 oz/sqft.
update 2/10/09:
manage to upload vid of this baby flying on its 5th flight.
as predicted, this baby isnt as its brother 28" which is much more a floater. with high wing loading shes having high stall speed as well, making it hard to make a soft landing. you know what it means for a deprn build.
i use totally hot glue for this build and m3 77 for laminating. no more painting for this baby, as i just wanna enjoy flying n crashing it.
i made some changes to the setup for saving weight. instead of using 4 servos, im just using 3. a for elevator and 2 for ailerons. as i wanna be able to set flaperons on my radio. i even try air breaks and some mixing.
for this baby to fly, need extensive dial in of dualrates and expos.
for the flying spec pls refer to the videos.
as u can see i enforce the motor mount with coro. its work.
planning on 26" for a truely keeper of mine.
update 2/15/09:
yesterday, i manage to totally grounded my 20" sukhoi. soon will start on my 26" span. seems like the problems comes from all the hot glues that i used to cover my sukhoi (yes, i covered most of the surface with it. my point - to make it stronger).
one of my friend said to me. "thats what happens when you know you can make another one."
yeah make another one, its just in the matter of money that i have to spend. :)
well guys. wait for my new 26" span. soon but not soon enough. gotta make some thinking first.
No comments :
Post a Comment
pls leave your email or other means of contact info.