Need launch pad for medium power rocket

The Rocketry Forum

Help Support The Rocketry Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Sorry for derailing this discussion and someone can correct me if I'm wrong, but I'm trying to make sure no one gets in trouble here - The G40 motor has 97 N-s of total impulse, and two of those makes 194 N-s of total impulse, pushing it into the H-motor range, meaning this is a high power rocket and you need a Level 1 cert. On top of that, unless there's a peculiarity in the rules that I'm not aware of, you're going to need an FAA waiver to fly it, in which case you are better off bringing this rocket to a club launch where they will have appropriate launch pads.

You can fly up to 320 N-s of clustered impulse without being L1
 
Also need to contact the closes FAA regulated tower and let them know you are flying if it is over a pound, or has that changed? Not a big deal most of the time, but something worth keeping in mind. This applies to RC flight as well, but they have their own rules for size and altitude. I don't remember a specific altitude being listed for rockets 1-3.3 pounds that might be exempt.
 
Also need to contact the closes FAA regulated tower and let them know you are flying if it is over a pound, or has that changed? Not a big deal most of the time, but something worth keeping in mind. This applies to RC flight as well, but they have their own rules for size and altitude. I don't remember a specific altitude being listed for rockets 1-3.3 pounds that might be exempt.

No need to contact FAA for rockets under 3.3 lbs (1500 grams). But also don't launch when there are aircraft in the area.
 
Over $60 for shipping at that eBay link.

Here is one for just under $30, shipped. It will come basically as a bare rail with a label on it, but I and several others around here have gotten rails this way.

https://www.sustainablesupply.com/80-20-t-slotted-extrusion-10s-72-lx1-in-h-1010-72-c1552409
 
FlightRadar24 is a fun app that can track aircraft in the area too.

Wonder if that tracks military aircraft. It's funny, other than jets over 30k, I rarely see too many aircraft. The most common is the medevac or someone with a dink flying overhead. But every once in a while, a squadron of bombers will "buzz" the top of my hill. It's quite a sight. You could throw a rock and hit one of them, no kidding. The last time I saw a fly-by I was actually painting my original L1 concept outside. Went straight over my head, at least a dozen of them. I was launching one of my tiny rockets that day as well. I waited until I was certain they were all past before launch.
 
Wonder if that tracks military aircraft
I don't think it tracks military aircraft. It uses the ADS-B transponders and a few other data sources. We have a squadron of A-10s locally that I have not seen on the app even when they are flying overhead. It also seems some homebuilt aircraft aren't visible too. If I'm particularly bored at our hangar, I look up who is coming and going. It is amazing to see a jet at 30k' and realize they're 50 miles away too.
 
Maybe they KNEW you were launching rockets????
Fat chance. I was still roughing it in my 8x12 cabin at the time. I think the path on top of the hill made a nice target for them. USAF does all kinds of exercises in this area because we're in the middle of nowhere. Fighter jets, bombers...never know what you are going to see in the sky around here.
 
You haven't seen any funny looking things sticking up out of the dirt, have you? If it's at the base I think you are near, I have actually delivered there before. They go through everything in the truck, remove things they do not want on base and then you get them back when you leave. Can only imagine what might fly over....
 
You haven't seen any funny looking things sticking up out of the dirt, have you? If it's at the base I think you are near, I have actually delivered there before. They go through everything in the truck, remove things they do not want on base and then you get them back when you leave. Can only imagine what might fly over....
No bases nearby really. I guess the closest would be Leonard Wood. There is an Armory in West Plains. Nothing suspicious sticking out of the dirt comes to mind. You mean like those little Area 51 camera thingies? I believe the closest air base is Scott, but it's easily a 4hr drive. I grew up around that area. Unless there's stuff in N. Arkansas that I'm missing for lack of appropriate search terms.
I've heard some UFO stories from the locals, so yes I suspect they occasionally test something really cool out here. Nothing on my radar cept them big meteors every now and again. Gotta love dark skies!

But um,, I'm going to shut up about all of that after this post, I've derailed this thread plenty. Feel free to PM if you want to chat more about the area though. Sounds like you have an interesting job.
 
IMG_20200411_002629158.jpg IMG_20200411_002733288.jpg IMG_20200411_002935496.jpg IMG_20200411_002952320.jpg IMG_20200411_003002032.jpg IMG_20200411_003039632.jpg I just put this together, with a rail from Graingers, and a Husky work light stand from Home Depot.
The rail cost $27, and the Stand $20.
 

Attachments

  • IMG_20200411_003022081.jpg
    IMG_20200411_003022081.jpg
    179 KB · Views: 60
Last edited:
They didn't "jab" it hard enough, lol. You need to use a slide hammer and get a good foot and a half or two feet of it burried. Removal may require a shovel. I have a 3/4 rod that I use for grounding at my house, it isn't much more than 2 feet deep but I promise that 200 pounds plus of force isn't going to get that little booger to budge. Perhaps jab was the wrong word to use on my part.
Best with something at least 1/2" as 1/4" is too flimsy and would probably bend before you got it down far enough. As you said though, this isn't the best option. Just wanted to qualify my remark as it was late and I may have been a bit too witty with the response. I apologize for that.
no no its ok. I forgot to get on the rocketry form sorry for late re.
 
No
Sorry for derailing this discussion and someone can correct me if I'm wrong, but I'm trying to make sure no one gets in trouble here - The G40 motor has 97 N-s of total impulse, and two of those makes 194 N-s of total impulse, pushing it into the H-motor range, meaning this is a high power rocket and you need a Level 1 cert. On top of that, unless there's a peculiarity in the rules that I'm not aware of, you're going to need an FAA waiver to fly it, in which case you are better off bringing this rocket to a club launch where they will have appropriate launch pads.
Faa waiver needed. And sorry I meant I want a launch pad for two G-40 motors wich is totally legal, But for a level one cert I wanna have a little fun and do two G80 motors. Sorry for the mixup thats my fault and sorry for late response
 
No

Faa waiver needed. And sorry I meant I want a launch pad for two G-40 motors wich is totally legal, But for a level one cert I wanna have a little fun and do two G80 motors. Sorry for the mixup thats my fault and sorry for late response

I may be misunderstanding your intentions.

Are you saying you want to certify using 2x G80s, or that you want to fly such a thing once you're certified?
 
Do you have a parts list I like it :)
From Ace Hardware
Boltmaster 1/4 inch-20 Steel Coupling Nut 4 pk
Item no. 52555 | 11835

2 1/4 Carriage bolt 2in long will have to file the square part under the head to clear the slot in the rail
1 1/4 Carriage bolt 3/4 in for stop
2 1/4 by 20 nuts

From Home Depot
Husky
Tripod for Portable LED Work Light
Internet #207186703
Model # K9028
Store SKU #1001863391
Graingers
80/20
Framing Extrusion
Item # 2RCP8 Mfr. Model # 1010-72 Catalog Page # 1118 UNSPSC # 31111501
I drilled 1/4 hole in the flat side of the led mount at the top, and one in the skirt at the bottom, then assembled as the pictures I showed, sliding the carriage bolt into the rail and then threading the steel coupling on it, as a stand off, then through holes drilled in the stand.
 
Last edited:
I may be misunderstanding your intentions.

Are you saying you want to certify using 2x G80s, or that you want to fly such a thing once you're certified?
I want to fly after im certified with two G80s but First I need my level 1 thats all sorry for mixup
 
From Ace Hardware
Boltmaster 1/4 inch-20 Steel Coupling Nut 4 pk
Item no. 52555 | 11835

2 1/4 Carriage bolt 2.5 to 3in long will have to file the square part under the head to clear the slot in the rail
1 1/4 Carriage bolt 3/4 in for stop
2 1/4 by 20 nuts

From Home Depot
Husky
Tripod for Portable LED Work Light
Internet #207186703
Model # K9028
Store SKU #1001863391
Graingers
80/20
Framing Extrusion
Item # 2RCP8 Mfr. Model # 1010-72 Catalog Page # 1118 UNSPSC # 31111501
I drilled 1/4 hole in the flat side of the led mount at the top, and one in the skirt at the bottom, then assembled as the pictures I showed, sliding the carriage bolt into the rail and then threading the steel coupling on it, as a stand off, then through holes drilled in the stand.
Estimate for price I am going to build this should hold my rocket right?
 
Just wanna thank you all for the help and support being new to rocketry is hard because you dont know a lot but when you open up to the community and ask questions you learn more and the people they are very helpful and nice, And are very respectful! Happy Easter!!!
 
No

Faa waiver needed. And sorry I meant I want a launch pad for two G-40 motors wich is totally legal, But for a level one cert I wanna have a little fun and do two G80 motors. Sorry for the mixup thats my fault and sorry for late response
Before you cluster G40 Motors, do some homework. Those use White-Lightning propellant, tend to light slowly, and are very difficult to successfully cluster.
 
Sorry just checked what I used again and they were 2in carriage bolts not 3in, total cost around $60
20 for the tripod, 27 for the rail, which I picked up and Graingers, and less then $10 for the hardware.

I would not use this on any rocket over about 10 to 12 lbs, but should be sturdy enough for entry level high power.
 
Sorry just checked what I used again and they were 2in carriage bolts not 3in, total cost around $60
20 for the tripod, 27 for the rail, which I picked up and Graingers, and less then $10 for the hardware.

I would not use this on any rocket over about 10 to 12 lbs, but should be sturdy enough for entry level high power.
none of my rockets are 10-12 pounds haha. about 3.2 with motors in I think
 
Before you cluster G40 Motors, do some homework. Those use White-Lightning propellant, tend to light slowly, and are very difficult to successfully cluster.
Are they hard to cluster G80-7t? Btw if I do two G80-7t thats when I get my cert not now.
 
Back
Top