Astrobee-D Confusing Instructions

Arsenal78

Well-Known Member
Joined
May 7, 2018
Messages
746
Reaction score
218
Working on an Aerotech Astrobee-D and I'm confused by the instructions. They say cut out two scale launch lugs and place on opposite sides of the rocket on the bottom between the fins and then it mentions a forward lug but gives no instruction on if it's another one of those or something else and if it's another one of the two it has you cut out, why not just say cut THREE out instead of TWO?
 

CalebJ

Well-Known Member
TRF Supporter
Joined
Jan 20, 2020
Messages
1,285
Reaction score
1,091
If the instructions match these, then I think there are two separate things going on... Scale launch lugs that you glue on one side (page 5 in the link below), and the functional lugs installed on the previous page.

 

Arsenal78

Well-Known Member
Joined
May 7, 2018
Messages
746
Reaction score
218
Later in the instructions it calls for this and this is what's throwing me off. It mentions gluing fasteners to the forward lug but has no mention of ever cutting a forward lug out. This is off the pages that came in the kit with the instructions.
1642019493388.png
 

heada

Well-Known Member
Joined
Jan 18, 2009
Messages
5,208
Reaction score
2,606
Location
Indianapolis, Indiana
Are you talking about the square plastic launch lugs that are used with a 1/4" rod to launch it or are you talking about the t-shaped lugs that are added for scale details?
 

Arsenal78

Well-Known Member
Joined
May 7, 2018
Messages
746
Reaction score
218
Are you talking about the square plastic launch lugs that are used with a 1/4" rod to launch it or are you talking about the t-shaped lugs that are added for scale details?
I’ve cut out the T shaped lugs, however after doing that, the instructions also mention a forward lug that isn’t the square 1/4” ones.
 

CalebJ

Well-Known Member
TRF Supporter
Joined
Jan 20, 2020
Messages
1,285
Reaction score
1,091
Did you look at the instructions I linked? They seemed a little clearer on the lug placement for both types (pages 4 and 5).
 

Arsenal78

Well-Known Member
Joined
May 7, 2018
Messages
746
Reaction score
218
Did you look at the instructions I linked? They seemed a little clearer on the lug placement for both types (pages 4 and 5).
Yes those are not the lugs I’m asking about. Did you look at the picture I posted? Look toward the bottom of it. It says to glue 5 fasteners to the forward lug but it is not a lug mentioned anywhere else.
 

CalebJ

Well-Known Member
TRF Supporter
Joined
Jan 20, 2020
Messages
1,285
Reaction score
1,091
What I'm saying is that the instructions I linked mention both types of lugs. Page 4 discusses the 1/4" launch lugs, and page 5 discusses the decorative ones.
 

heada

Well-Known Member
Joined
Jan 18, 2009
Messages
5,208
Reaction score
2,606
Location
Indianapolis, Indiana
On the true rocket, there were 3. 2 aft at 180 degrees to each other and 1 forward that was attached with a strap so that it fell away after it cleared the launch tower. It sounds like your question is about the scale one that is forward, right?
 

Attachments

  • Astrobee-D Blueprint.pdf
    303.2 KB · Views: 18
Last edited:

samb

Lifetime Member
Joined
Jan 22, 2009
Messages
4,369
Reaction score
824
Location
Plano, TX
The instruction in post #3 has dotted line arrows placing the forward scale lug on the aluminum band. I guess that is the only appearance of the part in that plan, oh well. The instructions in the file CalebJ posted in #2 says to center the piece over the gap in the aluminum band. So correct placement of the aluminum band appears to be the key to getting the forward scale lug located correctly.

1642024960240.png
 
Last edited:

Initiator001

Well-Known Member
Joined
Jan 18, 2009
Messages
3,119
Reaction score
548
How about a vintage Harry Stine drawing from Model Rocketry magazine, November 1970

View attachment 499482

http://www.ninfinger.org/rockets/ModelRocketry/Model_Rocketry_v03n02_11-70.pdf

Don't use any of Harry Stine's drawings for scale data.

Harry made a point of putting at least one incorrect measurement in his scale drawings so he would be able to trace back to someone who had 'illegally' copied or sold his plans.

The AeroTech Astrobee D scale drawing was made from actual engineering drawings from Aerojet.
 

Initiator001

Well-Known Member
Joined
Jan 18, 2009
Messages
3,119
Reaction score
548
Working on an Aerotech Astrobee-D and I'm confused by the instructions. They say cut out two scale launch lugs and place on opposite sides of the rocket on the bottom between the fins and then it mentions a forward lug but gives no instruction on if it's another one of those or something else and if it's another one of the two it has you cut out, why not just say cut THREE out instead of TWO?

You only need the third/forward scale launch lug if you are going to build the model in it's pre-launch condition.

See page six of the assemly instructions under 'Launch Configuration'.
I always built my Astrobee D models in 'Flight Configuration' so I didn't use the aluminum band, third scale launch guide and plastic fasteners.

(Writing the instructions for this kit were the most difficult for me of any of the AeroTech models).
 

samb

Lifetime Member
Joined
Jan 22, 2009
Messages
4,369
Reaction score
824
Location
Plano, TX
Don't use any of Harry Stine's drawings for scale data.

Harry made a point of putting at least one incorrect measurement in his scale drawings so he would be able to trace back to someone who had 'illegally' copied or sold his plans.

The AeroTech Astrobee D scale drawing was made from actual engineering drawings from Aerojet.
Duly noted. I hope he and the publishers of Model Rocketry don’t mind the reference here. ;)
I guess the op’s point was about the level of detail for the forward scale launch lug in the instructions.
 

Arsenal78

Well-Known Member
Joined
May 7, 2018
Messages
746
Reaction score
218
You only need the third/forward scale launch lug if you are going to build the model in it's pre-launch condition.

See page six of the assemly instructions under 'Launch Configuration'.
I always built my Astrobee D models in 'Flight Configuration' so I didn't use the aluminum band, third scale launch guide and plastic fasteners.

(Writing the instructions for this kit were the most difficult for me of any of the AeroTech models).
Thanks. Another question. Aerotech added rail guides into the kit along with lugs but between the launch shoes, fins, and antenna, is there any room for a rail to fit?
 

Arsenal78

Well-Known Member
Joined
May 7, 2018
Messages
746
Reaction score
218
I did notice on a few pictures of the real one on the pad, I cannot see the antenna parts. I guess they were installed later before flight.
 

Initiator001

Well-Known Member
Joined
Jan 18, 2009
Messages
3,119
Reaction score
548
Thanks. Another question. Aerotech added rail guides into the kit along with lugs but between the launch shoes, fins, and antenna, is there any room for a rail to fit?

I left AeroTech before the rail guides were provided in the kits.

I suspect if you attach the rail guides in place of the launch lugs that would work.
 
Top