Is this model rocket complete? Do I need anything else?

[AnonymousUser]

I have created a model rocket design capable of 2500 ~ 2700 ft, and I am wondering if my model rocket design is missing something. I have:

1. The two engines for the individual stages.
2. The engine blocks.
3. Tube couplers for my staging.
4. Parachute and shock cord.
5. Mass component of 70 grams.
6. Launch lug.
7. centering rings for my engines.
8. the actual tubes and nose cones.

Do I have it all? this area doesn't let me post pictures here, so I just had to list it.

 

[Hobie1dog]

To the forum.

 

[neil_w]

Welcome!

It's very hard to review a design by looking at a list such as what you posted. Do you have an OpenRocket file or something like that?

I was not aware that there was a rule against attachments for new members, but maybe. You may want to try again.

 

[Rschub]

You may need fins.

 

[techrat]

Launch Lug may create a lot of drag. Most people vying for extreme altitude use rail buttons or some other method (towers that go on either side of the fins) to delete the launch lug for a smoother airflow. What motors are being used? Obviously, if this A8-3's you're not getting the apogee you're looking for.

 

[lakeroadster]

Welcome!

It's very hard to review a design by looking at a list such as what you posted. Do you have an OpenRocket file or something like that?

I was not aware that there was a rule against attachments for new members, but maybe. You may want to try again.

I think it's after 10 posts?​

 

[tim cubbedge]

I think it's after 10 posts?​

He can post anything including attachments, just needs moderator approval for first 10.

 

[lakeroadster]

He can post anything including attachments, just needs moderator approval for first 10.

I thought it was 10 ​

 

[SolarYellow]

Launch Lug may create a lot of drag. Most people vying for extreme altitude use rail buttons or some other method (towers that go on either side of the fins) to delete the launch lug for a smoother airflow. What motors are being used? Obviously, if this A8-3's you're not getting the apogee you're looking for.

There's a PoF newsletter where TVM does some CFD work on launch lugs and rail buttons. If I recall correctly, rail buttons are not lower drag than launch lugs. Round cross sections suck for drag.

 

[Azamiryou]

rail buttons are not lower drag than launch lugs. Round cross sections suck for drag.

Do rail buttons have to be round? Has anyone experimented with other shapes to reduce drag?

 

[neil_w]

No.

Yes. E.g: https://modelrocketguy.com/products/10-10-airfoil-delrin-rail-guides

 

[SolarYellow]

NM

 

[Art Upton]

..dupe

 

[Lord Rory Gin]

Do rail buttons have to be round? Has anyone experimented with other shapes to reduce drag?

How about air foiled buttons?

 

[Ronz Rocketz]

Welcome to the forum. My advice is to not paint the rocket, launch, recover, then paint. Anything less than 3in diameter will be difficult to see at that apogee. If there's any wind, you've got a long walk ahead of you so bring plenty of water. If your rocket is anything like the So Long, then take caution because the name is well deserved. Good luck!

 

[cwbullet]

Do rail buttons have to be round? Has anyone experimented with other shapes to reduce drag?

Yes and I 3D print square ones also.

 

[David Schwantz]

Why square?

 

[AnonymousUser]

Launch Lug may create a lot of drag. Most people vying for extreme altitude use rail buttons or some other method (towers that go on either side of the fins) to delete the launch lug for a smoother airflow. What motors are being used? Obviously, if this A8-3's you're not getting the apogee you're looking for.

I believe I am using dual F15's. Thank you for the info

 

[cwbullet]

Why square?

Square or rectangular are easier to print.