AboutDave Landgraf Expertise I will be happy to take on questions about low-power rocketry in general, including rocket design, operating characteristics of blackpowder motors, low-power motor selection, rocket construction, aerodynamics, parachute and streamer duration competition, boost glide (and a little rocket glide), egg loft, altitude competition, and scale competition. I can help you with Barrowman stability calculations, but I am not a rocksim user. I know the basics of mid-power rocketry and small composite motors but I don't fly them much (I'd rather stretch my money by sticking with low-power). I believe I can explain many concepts in a way that just about anyone can follow (and maybe even over-explain?). I absolutely do not mind "newbie" questions one bit; the only bad question is the one you don't ask!
Experience I have flown model rockets for some 40 years, including a few early years of NAR competition. I have been active at the local club level as well as in the NAR. I enjoy designing and developing unconventional designs (the kind of thing you look at and say "it won't fly!").
Organizations National Association of Rocketry
Publications Model Rocketry (magazine)
Education/Credentials I am an aerospace engineer who has worked professionally in the field for over 30 years. I have worked often with local school, church, and scout groups to lead introductory build-n-fly sessions.
Question I was wondering, where do you buy A6-4 Rocket engines? Cheaper
Online its around 5.50-6.00$
Where do you buy them cheao
Like around 4 of them under 5.50$
Or bulk packs like 24 under 40$
Answer Hi again, Alex!
Prices on model rocket motors have been increasing recently in many parts of the country. Until about a year ago, you could find three-packs of Estes motors in many stores for about $5, and other motor manufacturers kind of had to try to match that price to be able to sell their stuff. Recently, the price of a three-pack has jumped in many parts of the country to around $7-8-9, which is just like everything else in this world (prices going up).
If there is a local rocketry club, you could ask some of those club members for advice on where to find good prices. Sometimes clubs will gather together orders from individual guys, and make a "group" order big enough to get some discounted prices.
Sometimes you can find discount coupons (look at the company's website, and check every week) for places like Michaels and Hobby Lobby, and sometimes you can find bulk packs in their stores. With a 40% off coupon, a $60 bulk pack can drop to $36! You just have to look around and see what's available in your town.
I don't know of any one place that is going to have super low prices. All I can suggest is that you shop! shop! shop!
