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Hi TRF colleagues, I have a question, please, on using my iPhone 15 Pro Max to photograph into the sun. I am just trying to be artistic (without much success). In particular I am trying to experiment with lighting. The normal rule is to have the sun behind the photographer, but now I want to...

Hi TRF colleagues, This summer I intend to fly my new LOC/Precision Warlock and possibly my old LOC/Precision Minie-Magg at Potter NY with URRG. I would like to enter reasonable starting-state wind conditions for simulating rocket launches using OpenRocket and RockSim. For OpenRocket: What do...

Hi TRF colleagues, Now that on its third attempt SpaceX Starship failed again to achieve all its mission objectives, we should refocus on the central and driving goal. That goal — the ultimate objective — is colonizing Luna. The United States is funding SpaceX to construct unnecessarily complex...

Hi TRF colleagues, I am hoping to fly a LOC Warlock this summer at the MARS Club, of which I am a member, to go for an L2 certification. I purchased the kit a few months ago, and up to now I have had the time only to do a dry fit. In a couple months’ time, I plan to build and paint the kit. I...

Hi TRF colleagues, I want to make sure that my iPhone compass is calibrated as well as possible. For that to happen, I understand, the iPhone needs to have a clear line of sight to the sky. However, I also have these questions, please: First, does it help to have cellular data turned on, or...

Hi TRF colleagues, I just bought an iPhone 15 Pro Max. My previous cellphone was quite outdated, so I thought that I would indulge myself. I mainly wanted to have a good camera, so currently this is the best in the iPhone lineup as I understand it. So, here’s my question, please. When I take...

Hi TRF colleagues, I think that I know the answer to this question, but I would just like to make sure, please. I was watching an Apogee Components RockSim Live video, and Tim was talking about dual deployment. He kept talking about making the first event — in other words when the main...

Hi TRF colleagues, My wife and I just watched the first episode of Season 4 For All Mankind. We continue to enjoy this series a lot. Stanley

Hi TRF colleagues, In OpenRocket this sequence exists: Edit > Preferences > Simulation, and then under Calculation Method is showing Extended Barrowman. Probably I want to keep Extended Barrowman, but no change seems available if I wanted to experiment with something else. In other words, any...

Hi TRF colleagues, Yesterday (Friday, 14 Apr 2023) I wanted to check something out on thrustcurve.org. I got the message that the site is "offline for maintenance. This app is undergoing maintenance right now. Please check back later." So today I checked again, and I am still getting the...

Hi TRF colleagues, The responses that you gave to my question as to what "parametric" means in the context of CAD has tremendously enlightened me. One issue that I never fully understood when I was studying calculus many years ago was the meaning of parametric equations. Many responses to my...

Hi TRF colleagues, I have this question pertaining to CAD, please. In the context of CAD programs, what does it mean to say that a particular program is parametric? We have all seen this nomenclature when reading about CAD programs. If you go to the Wikipedia article where CAD programs are...

Hi TRF colleagues, I have a general question about RASAero, please. I am reasonably proficient in using OpenRocket and RockSim. (I don't think that I am overstating my credentials.) I value these wonderful programs, and I could not function as a devoted sport rocketeer without them both...

Hi TRF colleagues, For sport rocketry, which is better -- Onshape or Tinkercad? This is a big question, I know. Stanley

Hi TRF colleagues, I would like to download a RockSim or OpenRocket file for the Tethys Rocket. Public Missiles manufactured, and LOC/Precision-PML currently sells, that rocket, as you may know. Does such a file exist, and does anyone know where I could find it, if it does? Thank you for...

Hi TRF colleagues, I have begun experimenting with air-starts. The example in OpenRocket opened my eyes to this technique in rocketry. I copied the Patriot Missile in the OR example to RockSim because I wanted to see an animation of an air-start using RS’s flight profile. When I copied the...

Hi TRF colleagues, Over the last several hours, I have conducted many OpenRocket tests using the base-drag hack. (To a lesser extent, I have also been testing this issue with RockSim.) For sure, when you have a short, wide rocket — a rocket whose length measures much less than 10 times its...

Hi TRF colleagues, Yesterday (Saturday, 18 Feb 2023) I started a short thread, which I entitled “Nosecone ballast”, in the High Power Rocketry forum. During the course of that thread, @JoePfeiffer very helpfully suggested that I use the base-drag hack. I did use it, and that enabled me to see...

Hi TRF colleagues, Eventually, I hope to construct a LOC/Precision Warlock for an L2 attempt. I have already bought the kit, weighed the components, and did a dry fit. I have not yet painted anything or actually built the rocket. I have put the rocket together on OpenRocket and RockSim using...

Hi TRF colleagues, and here especially OpenRocket developers, I am a big fan of OpenRocket. But I do wish that you would switch to metric units. Doing so would make things much easier not only for me but for metric users around the world. Please consider this: If you try it, you will find...