Finally got my Depron delivered and looked for the model I would produce. Looking through various online references the Tomhe line of models struck me as good looking and simple. That's quite a compliment from me as I generally do not like profile models.
The F-16 stood out ... and that is what I produced. Boy is it big !!
Modifications ... when gluede up - I felt the frame was too flexible in 6mm Depron so added following :
2cm wide long strips 6mm either side of fuselage above and below wing form .. running from rear of cockpit line to tail.
Rear of cockpit to nose complete same shape fuselage section 6mm added either side to strengthen front section.
Bamboo skewers laid into the foam 3cm in from LE of main wing from centre to near tip.
Bamboo skewers laid into foam just inboard of ailerons from centre to near tip. This gives each wing a definite stiffening V of bamboo.
Fixed tail plane horizontal had a bamboo skewer passed through fuselage and set into foam each side.
Ailerons cut out and hinged.
Photos to follow ...
Controls will be interlinked aileron / tail feathers giving dual Tailerons / Elevons ....
LiPo .. will be 2 x 1300 3S 25C LiPo's connected via Y lead so one can be attached either side of centre to balance out weight.
Sounds like a winner ! I've built 5 profile foamies now(F4J Phantom II, F-15(RIP) F-22(x2) Convair Sea Dart) and to this day, including all ARF'S. my F-22 is still my best flyer in the squadron. My warm up plane.
A couple of observations just out of curiosity. Why the twin battery set up ? Just for lateral balance? I know on my F-22 and all of my other profile foamies, I strap a 2200mah 3S 25C thin Zippy off to one side of the fuse along the intake. Never a problem but going to twin battery setup is interesting indeed
The other observation that pops out of the page is the prop size. 8 x 6 ? Are you saying the 1800KV is simply capable of swinging this prop or are you actually planning on using one? I would have two concerns but maybe I'm off base: 1). prop strike on arm during hand launch and 2). Prop breakage on belly landing
Maybe you're on to something. I've only used 6x4's with my 2200kv motors
The reviews I've read have a range of props from 6x4 up to 9x5 on this beats ... yes its a beast of a size !! The Fuse length is (memory now !) about 1.4m .... it is huge !
I have a 70mm EDF F16 and this thing is about same size ... but a lot lighter of course.
I have loads of 8x6 handy - as my Cessna uses them. I like to keep to a common size in as much as possible so it keeps my wallet happy !
The twin battery set-up is as per plan .. I can also think that splitting the pack like that reduces the break-away forces on that depron profile fuse. A single pack is a lot of weight to carry. The small packs are also left over from my 50mm T45 use .. but now I run bigger better packs in that - so they are redundant stock.
I'm game for anything here as it's first depron profile pusher I ever made myself.
The motor is rated for up to 10" prop - so the 8x6 is fine on the 3S.
Finally - I have a catapult launcher for it - so no hands involved at all.
I do decals, but I've never done a set of Thunderbirds. Too labor intensive. But I do think some guys have done some over on RCG. There is a Decals thread stickied in the Scale forum I think. Try in there.
On way home ... write up reports and then it's back to the important stuff - flying / building !
One thing I want ... is a true outline / scale line drawing of an F16 - so I can fashion outline tail feathers. This is not only for this model - but also for the reconstruction project I have of a 70mm EDF F16.
I'm sure the birds in your hangar feel neglected and miss you. Let us know how the F-16 build goes. I'm going to build one also now that I have a couple Grayson V-2's available. Doing my reycling duty to save the environment. But I have some depron going into the landfill !
Pretty much have the T-45 and F-16 dialed in. Looking at the new 50mm Katana but before I get that one, I might go ahead and get the Rare Bear .
Looking very RAF... No surprise there! LOL I'm using mainly 2200's w/30 amp esc and a 2550 w/50 amp esc on my foamie "prop in the slot" PJ's and have found the MAS 6x4e gives me the best performance in terms of speed. 3S 30C 11.1 V 2200mah .
Hope to have F-16 parts cut out this week or next as I have an extra GH-V2 and 30 amp esc become available due to the early retirement of my Convair Sea Dart.
Can't wait to hear your flight report. That baby should scream!
I plan to use my smaller 3S packs from the 50mm T45 I have .. now that I fly zippy compacts instead - they sit idle. It also allows me to split the battery load into two ... have a small pack either side of the fuselage spine. Gives me greater flexibility on CoG as well.
The 2 850mAh 20C 3S will then give me effectively 1700mAh and because they are parellel - the 20C rating will not restrict amp demand.
I also have 1300mAh 25C packs ....
I need to go raiding old airframes for links and control rods !! The linked ailerons / elevators system is from the F16 I'm rebuilding.
I like your idea on balancing the plane with the smaller 850mah twin packs. I know on my F-22, it's trimmed very well but it sure rolls to the left slower than it rolls to the right. Extra thin Zippy resides in port side intake. I too have a couple of " hangar queens" that get stripped for parts. Hopefully, my friend with the CNC cut out my F-16 parts using the new MPF hybrid foam. Club meeting tonight.
My modification to 4 servos ... has tipped her quite a way back on weight .. so batterys need to be too far fwd for the 800mah's ... but the 1300 mahs are fine.
The set-up and wiring is for purists devils kitchen !!
The motor wires have been extended using solid core copper wire for each to minimise voltage drop over 45cms ! to the ESC. This keeps battery to ESC leads at factory lengths.
The servos ... being split elevators / split ailerons ... it's a pain to program up, so it's going to be Y leads .. I have a choice - to link elevator servos together ... aileron servos together .. as a conventional set-up, or link each sides servos together ie left aileron + left elevator .. right aileron + right elevator. Then I can play games with elevons / ailervators etc.
My feeling is to link each side separately - then I get more combinations of movement ... and I can create differential if needed.