Apogee Peregrine Build

The Rocketry Forum

Help Support The Rocketry Forum:

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
I wanted to order a Zephyr sometime last year, but the day I checked it was out of stock. I wound up ordering a Peregrine instead, because why not. I have since seen several folks build and post photos of their Zephyrs, so I feel it's time for a Peregrine Build. Tim's kits are always a pleasure to build (the SR-72 Darkbird did give me some trouble, I may need to revisit it some day) with very detailed instructions. Unless I deviate significantly from his stock build, this will mostly be photos of the build process. It was packaged nicely, lots of parts...


IMG_0031.jpg
IMG_0032.jpg
IMG_0033.jpg
IMG_0037.jpg
IMG_0038.jpg
 
Last edited:

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
I roughed up the gloss coat on the motor tube followed by a little bit of edge rounding as per instructions followed marking the motor tube. I did add some CA glue to the rear, although I'll likely add an Aeropack retainer later so it isn't very necessary. Parts are tacked on with thick CA glue as per instructions...

IMG_0040.jpg
IMG_0042.jpg
IMG_0043.jpg
IMG_0044.jpg
IMG_0045.jpg
IMG_0046.jpg
IMG_0047.jpg
IMG_0048.jpg
IMG_0050.jpg
IMG_0051.jpg
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
Added a drop of glue to the ends of the Kevlar string to make it easier to thread through the centering ring holes. I have used other methods to remove the rear ring, Tim's method works well. After the initial parts are tacked, the fins are test dry-fitted...

IMG_0052.jpg
IMG_0053.jpg
IMG_0054.jpg
IMG_0055.jpg
IMG_0056.jpg
IMG_0057.jpg
IMG_0058.jpg
IMG_0059.jpg
IMG_0060.jpg
IMG_0061.jpg
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
After rounding off the one edge of each fin as per the instructions, they get tacked on with thick CA. After they set, the rear ring gets removed so the internal joints can be epoxied in the next step...

IMG_0062.jpg
IMG_0063.jpg
IMG_0064.jpg
IMG_0065.jpg
IMG_0066.jpg
IMG_0067.jpg
IMG_0068.jpg
IMG_0069.jpg
IMG_0070.jpg
IMG_0071.jpg
 

Arpak

Well-Known Member
Joined
Nov 23, 2020
Messages
85
Reaction score
69
Location
San Antonio, TX
Very cool! It's neat to see the similarities to the Zephyr kit, although the fins on this one look pretty sleak.
 

Adam3836

Well-Known Member
TRF Supporter
Joined
Aug 10, 2019
Messages
399
Reaction score
397
Location
CT
After rounding off the one edge of each fin as per the instructions, they get tacked on with thick CA. After they set, the rear ring gets removed so the internal joints can be epoxied in the next step...

View attachment 452929View attachment 452930View attachment 452931View attachment 452932View attachment 452933View attachment 452934View attachment 452935View attachment 452936View attachment 452937View attachment 452938
I really like how the aft ring can be pulled back out with the Kevlar string to add epoxy very smart !!
Keeps things really in line
 

LANZA COLINA

Member
Joined
Feb 24, 2021
Messages
8
Reaction score
6
Looking Good. I am curious what you are using to keep the fins straight in image 0064 and others once you have them glued in? And does in come in different body tube sizes and for different numbers of fins? I am thinking of using the fins from a Peregrine kit for a scratch build but would like to use more than 3 fins.
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
Looking Good. I am curious what you are using to keep the fins straight in image 0064 and others once you have them glued in? And does in come in different body tube sizes and for different numbers of fins? I am thinking of using the fins from a Peregrine kit for a scratch build but would like to use more than 3 fins.
I got some fin guides from Badass Rocketry, although these fins are a bit too thick for them, it still kept them in the slot until the CA grabbed fully.
 

Sluggo

Well-Known Member
Joined
Dec 20, 2020
Messages
301
Reaction score
115
I really like how the aft ring can be pulled back out with the Kevlar string to add epoxy very smart !!
Keeps things really in line
You can do this on any rocket. You don't need the string. 1) Glue the top ring to the motor mount tube. Let dry. 2) Once it's dry, apply glue inside the rocket for the top ring to be glued in place. 3) While the top ring is curing, simply 'dry fit' the rear ring just inside the rocket to ensure the motor mount tube is straight. 4) Once the top ring and motor mount tube has cured in place, use a pencil or an allen wrench to stick through the fin slots to push out that rear ring. Then you can add fillets to all the internal joints. .... No string needed. I hope this helps your builds.
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
That's a good explanation/description... I have done the same thing, and I have used the screws for the LOC-type retainers as handles, and a few other methods. Just keep the tube centered, and don't get any glue on the rear ring until ready. Also if your shock cord/tether attachment method uses epoxy down the motor tube, make sure it is positioned in between fin slots.

There was that one time I added fillets to the inner joint of the centering ring after carefully ensuring it was right at the edge of the fin slots, which then prevented me from inserting the fins in all the way. I had to notch the tabs to avoid the fillets. 🤪

This particular method ensures all the fin tabs and slots are aligned, as the rings don't get glued in until after the fins get tacked in place. While not needed, it is nice that Apogee engineered a method with detailed instructions, which once used folks will easily extrapolate to other builds that don't include this level of instruction.
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
Thanks- me too! I mixed up some 30 minute epoxy and poured it in to get a good joint on the upper centering ring and left it overnight. If I went by the instructions I would just have made fillets on the tube/ring joints when adding the internal fillets.

IMG_0073.jpg
IMG_0074.jpg
IMG_0075.jpg
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
Today so far I installed the rail buttons, cleaned up the tube end ding and soaked the rest of the tube ends with some thin CA before proceeding to the internal fillets...

IMG_0076.jpg
IMG_0077.jpg
IMG_0078.jpg
IMG_0081.jpg
IMG_0082.jpg
IMG_0087.jpg
IMG_0088.jpg
IMG_0089.jpg
IMG_0090.jpg
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
I added the fillets to the rear centering ring, and while it cured I sanded the couplers to rough up the surface for epoxy. Then I marked them per the instructions, one at 4 inches and the other at 3.5". Once the rear ring epoxy fillets were set I stuffed the nylon shock cord inside the motor tube to keep it out of the way. Using the same method as the backside of the forward ring, I poured some 30 minute epoxy in and spun the tube around allowing it to flow against the tube walls. There's nothing in the kit instructions about getting fillets on the upper side of the ring, and between all the other internal and external fillets I'm sure it is overkill...

IMG_0102.jpg
IMG_0103.jpg
IMG_0104.jpg
IMG_0105.jpg
IMG_0108.jpg
IMG_0109.jpg
IMG_0110.jpg
IMG_0111.jpg
IMG_0112.jpg
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
Using the coupler marked at the halfway point and some more 30 minute epoxy, the shorter extension tube was added to the first section. Some paper towels and alcohol cleaned it up nicely.

IMG_0113.jpg
IMG_0114.jpg
IMG_0115.jpg
IMG_0116.jpg
IMG_0117.jpg
IMG_0118.jpg
IMG_0119.jpg
IMG_0121.jpg
IMG_0122.jpg
IMG_0123.jpg
 

Patternflyer

Well-Known Member
Joined
Dec 1, 2020
Messages
91
Reaction score
91
I’m loving your build. Having just finished building my Zephyr, I had already decided to build the Peregrine next! Your thread has confirmed that in my mind. Your photos are awesome. Thanks for sharing this experience!!!! Keep ‘em coming!
 

messedupryan

Well-Known Member
TRF Supporter
Joined
Feb 28, 2021
Messages
188
Reaction score
283
Location
SLC, UT
@Wally Ferrer that is a gorgeous build you are working on. Excited to watch it progress.

(I'm off in the corner looking for smaller builds with that fin shape)
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
I’m loving your build. Having just finished building my Zephyr, I had already decided to build the Peregrine next! Your thread has confirmed that in my mind. Your photos are awesome. Thanks for sharing this experience!!!! Keep ‘em coming!
Happy to oblige... 😁
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
I added the short tube to aid in balancing for the external fin fillets. I put down some tape, mixed up the Rocketpoxy and poured it on and spread it with a popsicle stick. As Ian Dalton does in his Badass Rocketry videos, after 15 minutes I checked for air bubbles, and after another 15 minutes I used a fondant ball, pulled the fillets and removed the tape. These will cure overnight...

IMG_0126.jpg
IMG_0128.jpg
IMG_0129.jpg
IMG_0130.jpg
IMG_0132.jpg
IMG_0133.jpg
IMG_0134.jpg
IMG_0135.jpg
IMG_0137.jpg
IMG_0138.jpg
 

Sluggo

Well-Known Member
Joined
Dec 20, 2020
Messages
301
Reaction score
115
Wally, do you have a certification for flight on this rocket you're building.?? I'm considering getting a Level1 cert.
 

Wally Ferrer

SRE
TRF Supporter
Joined
Apr 20, 2019
Messages
1,233
Reaction score
1,602
Location
Manassas, VA
I do have a Level 1, and I'm planning to get a 2. I currently have no intention to get a 3, but if my wife hits the lottery all bets are off... 😃
 
Top