Thingiverse
![Estes Ramjet Oversized! by Aslansmonkey](/previews/8255956.jpg)
Estes Ramjet Oversized! by Aslansmonkey
by Thingiverse
Last crawled date: 3 years, 1 month ago
Previously I'd release a "Fat Ramjet" model based on ellipticaloptician's designs but that rocket crashed. In inspecting the wreckage I determined I could do better, so here is the redesign of the parts.
There are two versions of the base and the mid parts, one sized for Estes Maxi Rods (3/16" in diameter) and one sized for regular launch rods. If you decide to do the double scale model I STRONGLY recommend you use the maxi rod size.
To make the double scale version, you will need two BT-80 tubes at 10.5 inches long each, and one 20" BT-55 center tube. I had to use a coupler to make my center tube because the stock size for BT-55s is 18 inches.
You will want to cut a section of the centering ring out of the top piece and the one side of the middle piece that lines up with the launch lugs, otherwise the rod will rub on the rings.
I provided nose cones for both the double scale model and the fat short version. Both nose cones use the "Goblin" nosecone bases from here (https://www.thingiverse.com/thing:3073567). I used the "tight" base and put an eyebolt through the hole in the bottom. Epoxy a nut on the inside of the base to run the eyebolt to and you can then add washers to the nose cone to get the proper stability level.
Note that the "Fat Ramjet" version, being a short fat rocket, requires a LOT of weight in the nose to be stable. I made it as a challenge, but I don't recommend it. It'll maybe get a hundred feet or so out of an C6-5, but should fly high enough on a 24mm C or D. Having said that, I've not flown mine yet.
Ellipticaloptician's original designs, that these are based on, are sized for standard Estes D sized motors. While these should fly on a D, I would recommend using this adapter (https://www.thingiverse.com/thing:3071923) to fly them on larger Aerotech engines. I will also be publishing an adapter to allow you to use an Estes E in these designs, it should be noted that this adapter will extend downward from the bottom of the rocket 25mm, moving the center of gravity backwards. This may result in a loss of stability.
The Fat Ramjet required a lot of weight in the nose to reach stability in a swing test. I used 5 fender washers. I've not checked the double scale ramjet yet but in preliminary tests prior to painting, it seem to be stable as is. Being such a large rocket, however, it's hard to be sure from a swing test. The double scale is actually lighter than the Fat Ramjet, however, due to the weight that needed to be added to the Fat Ramjet.
This design should supercede my original Fat Ramjet design found here (https://www.thingiverse.com/thing:3062627), though that design can certainly still be used.
5/4/2019 Edit: Added a mid section that is also a coupler so you can just shorten two BT-55's from their original size to get it to fit. This coupler includes a loop to attach a shock cord to. I also added a version of the double scale fin rotated to the position I used when printing. This both fits on my printer better and aligns the "grain" of the print in a stronger position.
5/6/2019 Edit: ok, the rotated fin for the 2x doesn't print on my MS because it's unsupported. It keeps falling over part way into the print. So I added a new one that has a cross piece. This is intended to be printed with supports with the idea that the supports will stabilize the fin as it prints. The supports and tab can then be removed.
5/8/2019 Edit: I redesigned ellipticaloptician's original motor can to accept E-motors instead of D motors and created a 2x Ramjet base to use this new can. This is part of my project to rebuild the rocket after the original's "Core Sample" last year.
NOTE: You will have to scale the decals to fit.
FLIGHT REPORT:
Flew the Double Scale Ramjet on an E12-5 today using my E engine adapter. Everything looked good until the nose cone and chute separated at apogee. The body came down ballistically and made a nice loud "Thunk" upon hitting the earth, where it took a core sample. I know the rocket works, but sadly, mine is not reparable. Be sure you use good shock cord. The kevlar I used was apparently not up to the task.
There are two versions of the base and the mid parts, one sized for Estes Maxi Rods (3/16" in diameter) and one sized for regular launch rods. If you decide to do the double scale model I STRONGLY recommend you use the maxi rod size.
To make the double scale version, you will need two BT-80 tubes at 10.5 inches long each, and one 20" BT-55 center tube. I had to use a coupler to make my center tube because the stock size for BT-55s is 18 inches.
You will want to cut a section of the centering ring out of the top piece and the one side of the middle piece that lines up with the launch lugs, otherwise the rod will rub on the rings.
I provided nose cones for both the double scale model and the fat short version. Both nose cones use the "Goblin" nosecone bases from here (https://www.thingiverse.com/thing:3073567). I used the "tight" base and put an eyebolt through the hole in the bottom. Epoxy a nut on the inside of the base to run the eyebolt to and you can then add washers to the nose cone to get the proper stability level.
Note that the "Fat Ramjet" version, being a short fat rocket, requires a LOT of weight in the nose to be stable. I made it as a challenge, but I don't recommend it. It'll maybe get a hundred feet or so out of an C6-5, but should fly high enough on a 24mm C or D. Having said that, I've not flown mine yet.
Ellipticaloptician's original designs, that these are based on, are sized for standard Estes D sized motors. While these should fly on a D, I would recommend using this adapter (https://www.thingiverse.com/thing:3071923) to fly them on larger Aerotech engines. I will also be publishing an adapter to allow you to use an Estes E in these designs, it should be noted that this adapter will extend downward from the bottom of the rocket 25mm, moving the center of gravity backwards. This may result in a loss of stability.
The Fat Ramjet required a lot of weight in the nose to reach stability in a swing test. I used 5 fender washers. I've not checked the double scale ramjet yet but in preliminary tests prior to painting, it seem to be stable as is. Being such a large rocket, however, it's hard to be sure from a swing test. The double scale is actually lighter than the Fat Ramjet, however, due to the weight that needed to be added to the Fat Ramjet.
This design should supercede my original Fat Ramjet design found here (https://www.thingiverse.com/thing:3062627), though that design can certainly still be used.
5/4/2019 Edit: Added a mid section that is also a coupler so you can just shorten two BT-55's from their original size to get it to fit. This coupler includes a loop to attach a shock cord to. I also added a version of the double scale fin rotated to the position I used when printing. This both fits on my printer better and aligns the "grain" of the print in a stronger position.
5/6/2019 Edit: ok, the rotated fin for the 2x doesn't print on my MS because it's unsupported. It keeps falling over part way into the print. So I added a new one that has a cross piece. This is intended to be printed with supports with the idea that the supports will stabilize the fin as it prints. The supports and tab can then be removed.
5/8/2019 Edit: I redesigned ellipticaloptician's original motor can to accept E-motors instead of D motors and created a 2x Ramjet base to use this new can. This is part of my project to rebuild the rocket after the original's "Core Sample" last year.
NOTE: You will have to scale the decals to fit.
FLIGHT REPORT:
Flew the Double Scale Ramjet on an E12-5 today using my E engine adapter. Everything looked good until the nose cone and chute separated at apogee. The body came down ballistically and made a nice loud "Thunk" upon hitting the earth, where it took a core sample. I know the rocket works, but sadly, mine is not reparable. Be sure you use good shock cord. The kevlar I used was apparently not up to the task.
Similar models
thingiverse
free
![Mini Model Rocket by ryandgarrison](/t/8803785.jpg)
Mini Model Rocket by ryandgarrison
... use a 13 mm diameter estes rocket motor (1/2a or a).
make sure to add about 5-6 grams of weight to the nose cone for stability!!
thingiverse
free
![Model Rocket Nose Cones by Aslansmonkey](/t/8269152.jpg)
Model Rocket Nose Cones by Aslansmonkey
... was loose in the nose. hence the "tight" versions. just be prepared for the tight versions to possibly be too tight.
thingiverse
free
![Model Rocket Motor can by Aslansmonkey](/t/8266988.jpg)
Model Rocket Motor can by Aslansmonkey
...added extended motor cans that fit estes e size motors. also added an adapter if you want to use a d motor in one of those cans.
thingiverse
free
![Customizable Rocket Nose Cone Coupler by artdavis](/t/8710770.jpg)
Customizable Rocket Nose Cone Coupler by artdavis
...hangelog:
2017-05-07: file creation
2017-06-08: added fillet/chamfer feature to bottom of coupler for easier body tube insertion.
thingiverse
free
![Fat Ram Jet Rocket by Aslansmonkey](/t/8272872.jpg)
Fat Ram Jet Rocket by Aslansmonkey
... and survived the fall. i'll print a new nosecone for it and get a better shock cord. but the flight was nice and straight.
thingiverse
free
![BT-50 Nose Cone with Adjustable Weight by Antyos](/t/8681556.jpg)
BT-50 Nose Cone with Adjustable Weight by Antyos
.../4 20 nuts in it. you should be able to make your own cove with m20 threads that will fit on the base. i hope you find it useful!
thingiverse
free
![Mach 1 Rocketry BT-60 Nose Cone Bulkhead](/t/4673675.jpg)
Mach 1 Rocketry BT-60 Nose Cone Bulkhead
...try. just add an eyebolt and glue into the nose cone.
you can check out mach 1's website at...https://www.mach1rocketry.com/
thingiverse
free
![1/10 Scale Nike Smoke Model Rocket by mech-G](/t/8656709.jpg)
1/10 Scale Nike Smoke Model Rocket by mech-G
... double-perimeter fins can add weight to the rear of the rocket, so pay attention to the cg/cp relationship to ensure stability.
thingiverse
free
!["Tartarus" Model Rocket by HellforgeActual](/t/8069908.jpg)
"Tartarus" Model Rocket by HellforgeActual
...e is present or near any official government buildings/facilities.
|always check your local laws and regulations before a launch|
thingiverse
free
![Customizable Rocket Fin Alignment Jig by artdavis](/t/8711355.jpg)
Customizable Rocket Fin Alignment Jig by artdavis
...meters (ref: http://www.estesrockets.com/):
inner diameters:
bt-5: 13.2mm
bt-20: 18.0mm
bt-50: 24.1mm
bt-55: 32.6mm
bt-60: 40.5mm
Ramjet
thingiverse
free
![Roger Ramjet by karolyish](/t/8636221.jpg)
Roger Ramjet by karolyish
...roger ramjet by karolyish
thingiverse
screws for you
at these speeds who needs a tailfin.
thingiverse
free
![Semi Detection Ramjet by karolyish](/t/8636223.jpg)
Semi Detection Ramjet by karolyish
...semi detection ramjet by karolyish
thingiverse
dear, can you feel that?
thingiverse
free
![WFS ER Dirge and Ramjet G1 style Weapons by Perceptors75](/t/8177824.jpg)
WFS ER Dirge and Ramjet G1 style Weapons by Perceptors75
...ceptors75
thingiverse
g1 conehead style weapons with weapon effects ports on front and back of weapons. obj. and stl. included.
thingiverse
free
![ER Ramjet & Dirge Weapons by Shedrey](/t/8188703.jpg)
ER Ramjet & Dirge Weapons by Shedrey
...#39;s weapons, which scales better with the existing seeker guns, and i've added large and small weapon variations for dirge!
thingiverse
free
![Ramjet Calibration Cube](/t/4870246.jpg)
Ramjet Calibration Cube
...9;t delay, get printing your ramjetx calibration cube today and wow your friends!
ramjetx.
... self indulged name drop counter: 4
thingiverse
free
![2 planes by theemptyqueue](/t/8686598.jpg)
2 planes by theemptyqueue
...2 planes by theemptyqueue thingiverse a glider and ramjet are contained...
thingiverse
free
![Single Stage To Orbit by michaelchen0220](/t/8654964.jpg)
Single Stage To Orbit by michaelchen0220
...to orbit by michaelchen0220 thingiverse this ship has two ramjet engines and a toroidal aerospike...
thingiverse
free
![Pre-Discord Legion Ramjet Troposphere Quest-Squadron by Mekol1](/t/8148397.jpg)
Pre-Discord Legion Ramjet Troposphere Quest-Squadron by Mekol1
...f super soldiers are the troposphere quest-squadrons. they are solely responsible for finding stuff.
please do consider donating
thingiverse
free
![I-153DM by themindseye](/t/8576351.jpg)
I-153DM by themindseye
...flew an i-153 (no. 6034) equipped with two dm-2 ramjet. later on 3 october, loginov flew the same i-153...
Aslansmonkey
thingiverse
free
![Boo Mount by Aslansmonkey](/t/8539840.jpg)
Boo Mount by Aslansmonkey
...ly but then i thought "why not make a mount so i can stick it to the wall". so i did.
it now decorates my garage wall.
thingiverse
free
![Radial Engine Spinner by Aslansmonkey](/t/8054422.jpg)
Radial Engine Spinner by Aslansmonkey
...on many radial engine planes from the wwii era and looks good on my p-47. it should also work on the corsair or wild cat planes.
thingiverse
free
![8mm Light Bar by Aslansmonkey](/t/8708362.jpg)
8mm Light Bar by Aslansmonkey
...my sculptr delta, i remixed the wanhao one for the sculptr.
this light bar is probably usable on any printer using 8mm round bar.
thingiverse
free
![Claymore Hitch Plug XXL by Aslansmonkey](/t/8661017.jpg)
Claymore Hitch Plug XXL by Aslansmonkey
...ted that one so i gave it to him.
i wanted to make another one for my f-150, but it just needed to be bigger! hence, this remix!
thingiverse
free
![Extruder LED Strip Mount for Monoprice Maker Select V2 by Aslansmonkey](/t/8708001.jpg)
Extruder LED Strip Mount for Monoprice Maker Select V2 by Aslansmonkey
...rice maker select v2 by aslansmonkey
thingiverse
remixed the original to fit the screw spacing on the monoprice maker select v2.
thingiverse
free
![2015 Dalek Split by Aslansmonkey](/t/8583118.jpg)
2015 Dalek Split by Aslansmonkey
...t fits up to 125% this way on my monoprice maker select v2.
now if i could just print a full size one i could rule the universe!!
thingiverse
free
![Stanley GR25 Glue Gun Stand by Aslansmonkey](/t/8162798.jpg)
Stanley GR25 Glue Gun Stand by Aslansmonkey
...es pivot but doesn't lock in place. on mine it's snug enough that it doesn't freely rotate however, so this is fine.
thingiverse
free
![FLSun Effector with built in fan adapter by Aslansmonkey](/t/8670300.jpg)
FLSun Effector with built in fan adapter by Aslansmonkey
...nted to use the 40mm fan mod. but it occurred to me i could just combine that fan modification with the base effector, so i did.
thingiverse
free
![Delta Effector with integraded fan shroud by Aslansmonkey](/t/8710560.jpg)
Delta Effector with integraded fan shroud by Aslansmonkey
...ified the 40mm version to have an integrated fan shroud flush with the bottom of the effector. this is working well on my flsun.
thingiverse
free
![Model Rocket Display Bases (With Motor Clip notch) by Aslansmonkey](/t/8270904.jpg)
Model Rocket Display Bases (With Motor Clip notch) by Aslansmonkey
...ch for the engine hooks. so i modified it. enjoy!
11/19/2019 edit: i needed a 24mm stand for a dynastar snarky, so i made one.
Oversized
thingiverse
free
![Oversized key by BubaLettow](/t/8644743.jpg)
Oversized key by BubaLettow
...ized key by bubalettow
thingiverse
an oversized key, easy to print used for a theater production but could be used for anything.
thingiverse
free
![Overseer token holder by maboulton](/t/8701135.jpg)
Overseer token holder by maboulton
...overseer token holder by maboulton
thingiverse
token holder for the overseer board game
thingiverse
free
![Oversize Hook for Shower Rings by msadler2](/t/8349275.jpg)
Oversize Hook for Shower Rings by msadler2
...oversize hook for shower rings by msadler2 thingiverse an oversized hook to use with your shower curtain...
thingiverse
free
![Halloween Cookie Cutters - Oversized by Scribbless](/t/8095948.jpg)
Halloween Cookie Cutters - Oversized by Scribbless
... by scribbless
thingiverse
these are oversized cookie cutters i created for a friend. they are large, so pay attention to that.
thingiverse
free
![Oversized Egg Feet Holder by hassallthehoff](/t/9038588.jpg)
Oversized Egg Feet Holder by hassallthehoff
...oversized egg feet holder by hassallthehoff
thingiverse
a pair of oversized novelty egg cup shoes, to hold your egg this easter
thingiverse
free
![Oversized Magic The Gathering Card Holder by jmyers808](/t/8887789.jpg)
Oversized Magic The Gathering Card Holder by jmyers808
...oversized magic the gathering card holder by jmyers808
thingiverse
this is a holder for oversize magic the gathering cards
thingiverse
free
![GoPro Oversized Thumbwheel V1.3 by IntenseDef](/t/8557003.jpg)
GoPro Oversized Thumbwheel V1.3 by IntenseDef
...bwheel v1.3 by intensedef
thingiverse
gopro oversized thumbwheel v1.3
revised to v1.3 - stronger, drilled out, larger dia. wheel
thingiverse
free
![Pelton oversized transport by lebois43](/t/8592615.jpg)
Pelton oversized transport by lebois43
...pelton oversized transport by lebois43
thingiverse
support for pelton turbine
thingiverse
free
![2 piece oversized throwing knife by nunthok3D](/t/8944431.jpg)
2 piece oversized throwing knife by nunthok3D
...2 piece oversized throwing knife by nunthok3d
thingiverse
easy printing 2 piece oversized kunai throwing knife
thingiverse
free
![Oversized Pepperbox gun by Snorri](/t/8826702.jpg)
Oversized Pepperbox gun by Snorri
...for a regular size), the barrel moves, just add a m5 screw between the 2 body halves before glueing, and a bolt inside the canon.
Estes
thingiverse
free
![Estes Protox body by rafal](/t/8951536.jpg)
Estes Protox body by rafal
...estes protox body by rafal
thingiverse
body replacement for estes protox
support de remplacement pour estes protox
thingiverse
free
![Estes PNC-20ED by robnee](/t/8986191.jpg)
Estes PNC-20ED by robnee
...estes pnc-20ed by robnee
thingiverse
estes pnc-20ed nose cone for estes nomad and saros vintage rockets.
thingiverse
free
![Estes Proto X_quard_01 by Summer1119](/t/8991865.jpg)
Estes Proto X_quard_01 by Summer1119
...estes proto x_quard_01 by summer1119
thingiverse
estes proto x_quard_01
thingiverse
free
![Estes PFU-54ED by robnee](/t/8986038.jpg)
Estes PFU-54ED by robnee
...estes pfu-54ed by robnee
thingiverse
estes plastic fin unit it 2 parts for vintage estes kits nomad, saros etc
thingiverse
free
![Estes PNC-5BA by robnee](/t/8987716.jpg)
Estes PNC-5BA by robnee
...estes pnc-5ba by robnee
thingiverse
estes pnc-5ba nose cone
thingiverse
free
![Estes Rocket by Ilslaoaycd](/t/8754222.jpg)
Estes Rocket by Ilslaoaycd
...estes rocket by ilslaoaycd
thingiverse
fun rocket that works!!
thingiverse
free
![Estes PTA-2050 by robnee](/t/8986039.jpg)
Estes PTA-2050 by robnee
.../tube adapter. used in vintage estes saros, nomad etc.
8/29/2014 - updated to include an attachment point for recovery system.
thingiverse
free
![Elle Est Forte by Eternel06](/t/8272323.jpg)
Elle Est Forte by Eternel06
...elle est forte by eternel06
thingiverse
samsung galaxy s8 " elle est forte" - " she is strong".
enjoy
thingiverse
free
![Estes BNC-55AC Nose Cone](/t/4806014.jpg)
Estes BNC-55AC Nose Cone
...ubing.
a cap to fit in the bottom of the nose cone is also included with this design that you can add a screw eye or eye bolt to.
thingiverse
free
![Estes Goblin Fin Guide by Murricane101](/t/8019252.jpg)
Estes Goblin Fin Guide by Murricane101
...estes goblin fin guide by murricane101
thingiverse
fin guide for estes goblin