Scratch Build - Lil' Ripper 3D Foamy

Started by Jatayu, June 30, 2011, 12:39:07 PM

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Jatayu

Hello All ;D ;D

This is a foamy which i completed last week. Actually i started the build last year itself but somehow it went off to the side when
i got busy with college and SAE Aero Design works, so finally i got to complete it last week.Sadly due to this i couldnt take pics
when i was building it so i have only the pics of the final outcome.

This plan is very similar to the RCgroups 'Big Nasty' but i got it from 3DMON Designs with slight modification in the nose and under
the name Lil' Ripper.

Here is the link : http://www.3dmondesigns.com/Lil%27-Ripperplans.php

I used 5mm Depron for most of the construction and some 5mm Balsa in the nose to fix the motor mount.

Specs:

Wingspan - 31"
Length - 32"
AUW ( without electronics) = 250gms (is that a lot?? :headscratch:)
Brushless motor - Emax GT2215/09 from RcDhamaka
Prop - 9*4.7 SF
Esc - HK 40 A
Servos - 3 * Aeolian 9g From RcBazaar
Batt - Turnigy 1000mah

Motor Mount : C28 mount from Rcbazaar, i tried different motor mounts there and found out that this one in particular is an excellent
mount for Grand Turbo series motors {:)} (http://rcbazaar.com/products/178-mounting-seat-for-c28-series-motor.aspx)

Still Have to maiden.But had a short chuck test with 50% throttle to see if i need any reinforcement in the tail etc.

Pics will follow soon. :)



Spektrum Dx6i | Blue Baby |  Fast Cat | TB-20 | Speedy | Lil' Ripper| Little Elley| PT-20 Ryan | Delsoro - SAE Heavy Lifter | Hiller 450v2|2x AXI 2217/2|2x Castle Creations- Thunderbird 54A| 2x Thunderpower RC Lipo 850mAh 65C| 10x Futaba s3114

SAE Aero Design West- 2011
1st Place Highest Payload Lifted
2nd Place Operational Availability

Jatayu

I Know that GT2215 and 40A is an overkill for this plane but its just an initial setup. will change to either a Towerpro combo or a Aeolian C2826- KV1200 brushless motor.
Spektrum Dx6i | Blue Baby |  Fast Cat | TB-20 | Speedy | Lil' Ripper| Little Elley| PT-20 Ryan | Delsoro - SAE Heavy Lifter | Hiller 450v2|2x AXI 2217/2|2x Castle Creations- Thunderbird 54A| 2x Thunderpower RC Lipo 850mAh 65C| 10x Futaba s3114

SAE Aero Design West- 2011
1st Place Highest Payload Lifted
2nd Place Operational Availability

Jatayu

Here are some pics of the build...
Spektrum Dx6i | Blue Baby |  Fast Cat | TB-20 | Speedy | Lil' Ripper| Little Elley| PT-20 Ryan | Delsoro - SAE Heavy Lifter | Hiller 450v2|2x AXI 2217/2|2x Castle Creations- Thunderbird 54A| 2x Thunderpower RC Lipo 850mAh 65C| 10x Futaba s3114

SAE Aero Design West- 2011
1st Place Highest Payload Lifted
2nd Place Operational Availability

Jatayu

Motor mount, main wing and servos..
Spektrum Dx6i | Blue Baby |  Fast Cat | TB-20 | Speedy | Lil' Ripper| Little Elley| PT-20 Ryan | Delsoro - SAE Heavy Lifter | Hiller 450v2|2x AXI 2217/2|2x Castle Creations- Thunderbird 54A| 2x Thunderpower RC Lipo 850mAh 65C| 10x Futaba s3114

SAE Aero Design West- 2011
1st Place Highest Payload Lifted
2nd Place Operational Availability

ashJR7202

nice built...

2215 or 2826 are overkill, both are powerful motors meant for around 39"-44" ws model, and i think little heavy.... for this plane even emax 2812 is good enough if u want more punch then 2822 is just more than enough!!!!

once i tried 2213 on my 30" foamy and on landing motor mount came off, tearing biofoam!!!! so if u really going with ur motor then give lots of support to motor mount!!!
Hanger: Mini Yak-54| 210 Phantom | SU-47| F-15| EuroFighter|Scrappy|SU 27|Eurofighter|Sukhoi PAK FA
Blade MCX| Blade CP PRO
JR XP7202| DX7

Jatayu

Thanx :) Will keep that in mind.

Actually thought of a 2812 but was tempted for more and put in 2215...Maybe i shouldnt have, will change...
Have given enough support i think but i met Sharad (RC) last week and he thinks i need to elongate the support a bit more, will try to fix that up without having to remove a lot of the glued parts...
Spektrum Dx6i | Blue Baby |  Fast Cat | TB-20 | Speedy | Lil' Ripper| Little Elley| PT-20 Ryan | Delsoro - SAE Heavy Lifter | Hiller 450v2|2x AXI 2217/2|2x Castle Creations- Thunderbird 54A| 2x Thunderpower RC Lipo 850mAh 65C| 10x Futaba s3114

SAE Aero Design West- 2011
1st Place Highest Payload Lifted
2nd Place Operational Availability

naatumach

nice.. i dont know anything about an overkill.
But is the model ready to take an over powered motor?
Motto: build, fly, and modify.
Prefers working on designs than electronics.
No pre-made plans. Use blueprints, make calculations, build, fly, troubleshoot, fly again.

Swapnil


naatumach

oh! :P i just thought it had to do with the power to weight ratio and nothing to do with the actual model.
Motto: build, fly, and modify.
Prefers working on designs than electronics.
No pre-made plans. Use blueprints, make calculations, build, fly, troubleshoot, fly again.

Jatayu

I've been reinforcing the model with all kinds of things to handle this motor. but of course even if i dont change the motor , i wont be flying on full throttle. so then i'll just have unneccesary weight on the plane. Maybe i'll change it to 2812 or a towerpro bell from one of the HK combos.
Spektrum Dx6i | Blue Baby |  Fast Cat | TB-20 | Speedy | Lil' Ripper| Little Elley| PT-20 Ryan | Delsoro - SAE Heavy Lifter | Hiller 450v2|2x AXI 2217/2|2x Castle Creations- Thunderbird 54A| 2x Thunderpower RC Lipo 850mAh 65C| 10x Futaba s3114

SAE Aero Design West- 2011
1st Place Highest Payload Lifted
2nd Place Operational Availability