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Latest Threads
Cambridge Rocket Club in ...
Forum: Local
Last Post: Sunward
07-12-2019, 11:43 AM
» Replies: 76
» Views: 47,049
Punisher 4 Kit Bash - Min...
Forum: Your Projects
Last Post: MarkH
05-11-2019, 09:42 AM
» Replies: 39
» Views: 44,917
Sunward Hobbies Becomes M...
Forum: Vendor & Manufacturer Display
Last Post: Sunward
05-03-2019, 04:05 PM
» Replies: 0
» Views: 470
Shock absorber ?
Forum: Recovery
Last Post: wclune
05-01-2019, 11:36 AM
» Replies: 3
» Views: 817
AMW Red Max Build
Forum: High Power
Last Post: MarkH
04-09-2019, 09:17 PM
» Replies: 45
» Views: 54,102
Aerotech J500T motor buil...
Forum: Propulsion Non-EX
Last Post: MarkH
04-04-2019, 12:33 PM
» Replies: 4
» Views: 2,138
Aerotech 98/2560 Mojave G...
Forum: Propulsion Non-EX
Last Post: MarkH
04-04-2019, 12:30 PM
» Replies: 2
» Views: 866
Seasons Greetings
Forum: Vendor & Manufacturer Display
Last Post: Sunward
12-24-2018, 01:11 PM
» Replies: 0
» Views: 765
Radio to iPhone APRS cabl...
Forum: GPS and Trackers
Last Post: MarkH
12-13-2018, 07:48 PM
» Replies: 1
» Views: 1,549
Sunward 2018 Black Friday...
Forum: Vendor & Manufacturer Display
Last Post: Sunward
11-25-2018, 07:05 PM
» Replies: 2
» Views: 898

  Sunward Hobbies Becomes Major Sponsor for TORCAN Model Show Saturday May 25 2019
Posted by: Sunward - 05-03-2019, 04:05 PM - Forum: Vendor & Manufacturer Display - No Replies

Sunward Hobbies is proud to be a major sponsor and exhibitor at the 2019 show being held at Century Gardens in Brampton on Saturday May 25, 2019. The show is run by volunteers of the Peel Scale Modelers.
The show and model contest will run from 9:30 am to 5pm.

Full details at the TORCAN site: www.torcanmodelshow.com

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  Shock absorber ?
Posted by: SwampFox - 04-25-2019, 09:56 PM - Forum: Recovery - Replies (3)

Anyone using a mechanical shock absorbing device other that 2 miles of Kevlar or in line elastic? Getting ready to test a rear eject 3" rocket and thinking about the two items traveling in different directions and the shock force at the BT.

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  Aerotech 98/2560 Mojave Green Motor Build
Posted by: MarkH - 01-23-2019, 11:02 PM - Forum: Propulsion Non-EX - Replies (2)

Similar to my J500T motor thread,  I purchased a single green 98 mm propellant  grain and EMK, to make a 98/2560 K motor.  Aerotech offers everything but the green and sparky loads for this case, so why not make a green.  

I came across this LUNAR newsletter that has flight summaries for all the loads for the single grain (coffee can) 98 mm case except for the L339 Warp 9 endburner, which was yet to be developed at that time. 


The author also flew a green demo motor for the single grain case. Aerotech was still tweaking the green propellant at the time (2006).  Apparently the green load never came to fruition for this case.  Actually, green reloads are under represented in the 98 mm line as the green is only available in the 3 grain 98/7680 case. 

After talking to Karl at Aerotech, he gave me the specs for the nozzle for a green single grain 98 mm motor, which are the same as for the K650T blue load for same case.

I will update this thread when I build and fly the green 98/2560 motor.

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  Aerotech J500T motor build
Posted by: MarkH - 01-19-2019, 11:51 PM - Forum: Propulsion Non-EX - Replies (4)

Alright, so  the J500T is a single grain Blue Thunder load for the 75/1280 case that exists on the Aerotech website, on the same instruction sheet as the K1000T (75/2560) motor.  However the J500T was never actually sold or certified. After talking with Karl at Aerotech, I found that shopping at the RCS webstore (https://www.rocketmotorparts.com) and buying the single 75mm Blue Thunder propellant grain and the 75/1280 EMK (experimental motor kit) will give you the J500T. Specs for the nozzle throat sizes are attached.  Technically since this motor was not certified it has to be flown as an EX motor.

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  Seasons Greetings
Posted by: Sunward - 12-24-2018, 01:11 PM - Forum: Vendor & Manufacturer Display - No Replies

We would like to take this opportunity to wish you and your family a happy and joyous holiday season.  Best wishes for a happy, healthy, and prosperous New Year in 2019!

Shipping will resume Thursday December 27 as all shipping companies are closed on Tuesday and Wednesday for Christmas and Boxing Day holidays.

Angelo and Pina Castellano

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  Radio to iPhone APRS cable
Posted by: MarkH - 12-10-2018, 01:19 PM - Forum: GPS and Trackers - Replies (1)

I finally got around to soldering the parts for a cable to connect my Baofeng radio to iPhone per this John Boiles hack from several years ago.


I'm pretty sure I got the soldering of the 0603 sized components down fine, but hit a snag with his schematic for connecting the cables, particularly the TRRS cable connections.  The photos in his write-up don't help much either. As I went about troubleshooting and trial and error changing the wire connections I found this hack is pretty much obsolete.  I bought the circuit board and parts a couple years ago, but I see a pre-made cable is now available.  Nice.  Haven't seen mention of this cable:  


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  Sunward 2018 Black Friday Sale
Posted by: Sunward - 11-22-2018, 06:30 PM - Forum: Vendor & Manufacturer Display - Replies (2)

We now have sales on both sites for Black Friday. Ends Sunday November 25 2018.

Sunward Rocketry
CTI Pro-X line of hardware - 10% off

And now Free shipping on orders over $50 USD to continental USA.

Pricing in US dollars.
Note: Pro38 hardware orders may be delayed 4-6 weeks.
No membership fees or clubs to join.

For quotes to other countries, please email or call for a shipping quote.

Sunward Hobbies:
CTI Pro-X line of hardware - 10% off

General Hobbies
Wrebbit 3D puzzles - 20% off

Clearance on Select Badger Paint Lines:

Rye Field Model Kits - 20% off

Many of our Early Black Friday Sales are still ongoing. Includes sale on Takom models and Plastic Dream. Further discounts on Lifecolors Paints, Panpastel Colours and Kits, Model Master 2000 and 2100 Series paints and Rekab brushes,

And don’t forget to check out our clearance section:

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  CTI Pro-X 3 Day Price Freeze
Posted by: Sunward - 09-20-2018, 11:58 PM - Forum: Vendor & Manufacturer Display - Replies (2)

Cesaroni Technology Inc, makers of the Pro-X line of rocket motors and motor casing, have raised the wholesale price of their entire line.

Sunward will keep the pricing at old levels for hardware until Sunday September 23, 2018, 11:00PM ET.

No membership is required for purchasing.

For orders to the US:

For orders within Canada:

Prices for motors shipped within Canada will incur a surcharge for exchange rate conversions effective immediately.

Current quotes will be honored for 30 days.

For orders elsewhere:
please contact us for a pricing quote.

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  increasing readership
Posted by: FMarvinS - 09-09-2018, 12:02 PM - Forum: Forum Help - Replies (2)

I humbly suggest considering inviting well known rocketry enthusiasts to submit articles/threads on topics of interest such as: New building techniques (e.g. Crazy Jim); designing/building/launching multi stage rockets (.e.g. CJ, Jim Jarvis, and a slew of others); MD design/flight , GPS tracking, photography while in flight, discussions of ex motors, etc. 

Also-possibly have some manufacturers offer discounts on their items to readers on this site. 
I thoroughly enjoy the threads/posts of Mark H (I've been known to incorporate his sage advice into my own builds) and always look forward to his threads. By increasing the number of such threads (as suggested above), I believe that the readership and commercial industry support would increase.

I'm not a marketing pro-but I'd love to see this site flourish!

Fred, L2

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  Satellite GPS trackers
Posted by: rdh8 - 08-28-2018, 06:02 PM - Forum: GPS and Trackers - No Replies

I finally found the holy grail of rocketry tracking.
Jerry Larson of UP Aerospace turned me on to them as they use them in their 450,000' flights.

It's the spot.

What is so new is the service is only $15/month.
No ground station, receive your rockets location on a smart phone app.
And the data is all logged on the web.
4AAA batteries powers the waterproof device for 14 days.
Sure, it locks out over 20k, but it's for recovery.
Once you recover your rocket you download the data from your GPS logger.
I like this Sparkfun logger $15 and you have all the GPS data you need.
And the Beitian BN-800 has been working well, gotta love drones driving prices down. And it's right on Amazon and I can get free delivery by Thursday.
It has  U-Blox 8 chipset and is only $20
So for $35 and 3 little wires, your up and running.

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