Flight Discord Summaries

[Sapphire]

Hello! I made a discord bot to summarize the flight server using AI. Summaries will periodically be posted here. DISCLAIMER: as the summaries are created using GPT-4 they may not be entirely accurate. I'll do my best to proofread, assuming I've read the actual conversation.

To start off:

Winding Techniques and Tools

• General Tips for Winding:
  • Saph provided a link to Coach Brian's YouTube tutorial on how to properly wind the plane rubber: How to Wind a Plane Rubber Tutorial.

Torque Meters

• Discussion on Torque Meter Importance:
  • .bananasaurus. emphasized the importance of using a torque meter to ensure precision in the winding process.
• Recommended Torque Meters:
  • A few links to recommended torque meters were shared. Here are the recommendations:
    • Laser Cut Planes Torque Meter
    • J&H Aerospace Torque Meter
    • Indoor FF Supply Simple Torque Meter
• Torque Meter Reviews and Opinions:
  • Saph mentioned that the torque meter from Freedom Flight Models is considered flimsy and is not recommended.
  • .bananasaurus. discussed the utility of a digital torque meter and noted that it is accurate and convenient, but not necessary for Science Olympiad (SciOly). However, for other categories such as Limited Penny Plane (LPP), A6, etc., it can be more beneficial.
• Building a Torque Meter:
  • .bananasaurus. gave advice on building a torque meter, indicating a vertical load cell is preferable to a horizontal one due to better comparability of torque readings with others.
• Specifications for Digital Torque Meters:
  • When asked about the precision of the digital torque meter, .bananasaurus. indicated it has 4 decimals of precision. The maximum torque tolerance noted was up to 2 in/oz, which should be more than sufficient unless flying outdoors.

Rubber Preparation

• Rubber Tying Technique:
  • Saph shared a YouTube video that demonstrates how to tie rubbers to achieve the perfect weight: Tying Rubbers for Flight
• Hemostats for Rubber Handling:
  • Saph mentioned getting a pair of hemostats (referred to as 'hemos') for only $3 at a local hardware store, which can be useful for handling the rubber.

[Sapphire]

Rubber Motor Management & Regulations

• Recording Rubber Motor Details:
  • 黄逗逗 inquired about recording rubber motor information as seen in Coach Chuck's video. A Google Docs template was created for such records.
  • Saph shared they keep track of source, density, and number of times the rubber has been wound using tally marks.
  • .bananasaurus. recommended not recording each instance of winds/torque but mentioned writing down the information on tiny paper letter packets.
• Weight Rules for Rubber Motors:
  • 黄逗逗 asked whether O-rings count towards the 1.5-gram weight limit for rubber motors, and CommandNConquer confirmed that they do.

[pumptato-cat]

Further comment on the FF torque meter:
I've used it for over a year now(continuously) and although some components have broken, such as the wooden dial, there is nothing that can't be easily fixed. Most breakages were caused by improper handling. I've dropped mine from waist level to the floor three times, fixed it twice, and it's completely fine.

[bjt4888]

Sapphire,

Good job summarizing resources!

Also see this https://youtu.be/HccYaD_AjQg?si=ZwEZliqQzZ_WnsHZ

Super cheap $1 torque meter made with a guitar string and free paint stir sticks. Demo video by me for the NFFS.

Brian T

[Sapphire]

Woohoo the bot can now see message attachments! Coach Brian, would you be interested in joining the Discord? It's not too different from the forums and Coach Chuck is in it.

Pumptato - idk, we used to have a FF torque meter 2 years ago and while it didn't get dropped, it broke during winding one day.

Now for a little more summary stuff:

Make sure to watch this video if you want to build a prop.

Prop Building Orientation and Specs

• Correct Orientation:
  • abcdefgh posted a photo seeking confirmation of the propeller orientation before baking it. The orientation was confirmed as correct by Coach Chuck.
  • Attachment of the prop orientation can be viewed here: Propeller Orientation.
• Blade Size Recommendation:
  • Coach Chuck recommended that the inner end of the blade should have .75 to 1 inch of space without wood (bare) to prevent excessive twisting and potential breakage. This part of the spar does little for propulsion.
  • Coach Chuck also noted that if the spar is made of bass wood, it will naturally twist to provide some flare.

[Sapphire]

DISCLAIMER: The following summary is generated using AI and may not be completely accurate.

No Touch vs. Touch Planes Discussion

• Difference Explained:
  • BossCrusher667 gave insight into 'no touch' and 'touch' planes based on last year's nationals video. 'No touch planes' are designed to be much slower and have a larger turning radius, whereas 'touch planes' can recover from ceiling touches. This distinction allows for different flying strategies and risks.
• Trimming for Optimal Flight:
  • When trimming a plane, 'no touch' flights are preferred as they allow for better assessment of the plane's performance and necessary trim changes, according to BossCrusher667.
• Determining the 'Touch' Aspect:
  • The 'touch' aspect depends on the wing and center of gravity (COG) positioning. A forward wing and COG favor touch recoverability, while a rear COG may prevent it. The concept of Static Stability Margin (SSM) relates to a plane's stability; however, he couldn't recall the exact formula.
• Efficiency and Stability Trade-offs:
  • Daniel from the forum offered his experience, suggesting that high efficiency with a big wing could lead to poor stability, but it's still possible to have efficient and stable flights.
• Additional Insights:
  • Plane stability and COG discussions also involved arjefferson and abcdefgh. They discussed the cog placement in relation to the center of lift and the effects on the plane's performance, as well as tested flight durations and recovery plans for potential crashes.

[Sapphire]

Discussion on Half Motors and Partial Motors for Indoor Free Flight

• Purpose of Partial Motors:
  • Saph and other users discussed the use of half motors to save time on flight tests and optimize trimming.
  Trimming with Partial Motors:
  • The conversation shifted towards whether it's beneficial to trim with partial motors, with users like BossCrusher667 and pumptato-cat questioning and discussing the technique.
  Correct Setup for Partial Motors:
  • Coach Chuck clarified that testing usually involves half motors with a stick replacing the back half.
  • An article specific to this topic was linked: Flying on Partial Motors.
  Benefits of Partial Motors Stated by Coach Chuck:
  • Shorter flights, lower altitude, reduced ceiling tangle risk, and ability to simulate contest altitude in smaller gyms.
  Understanding Motor Breaks and Flight Quantity:
  • Coach Chuck explained that the same number of flights should be expected since winding would be to the same torque, regardless of whether the motor is half, quarter, or whole.
  Use of O-Rings and Wire Spacers:
  • Clarification on the use of O-rings and wire spacers was provided by Coach Chuck.
  • The O-ring attaches to the prop shaft and the wire spacer hooks to the torque meter with the stooge hook to hook distance matching the plane's hook to hook distance.
  Height Scaling for Competitions:
  • Users discussed the benefits and practicalities of using 2/3 motors versus half motors considering height scaling for the purpose of trimming and fitting the gym space.
  • The consensus was that any fraction of the motor could be used as long as the space length and mass make up the rest of the motor.

Modifications to Free Flight Craft for Stability in Strong Air Conditioning

• Center of Gravity Adjustments:
  • seaotter suggested moving the center of gravity (CG) forward for improved stability by either moving the wing back or adding clay to the front of the plane.
• Circle Size Reduction:
  • To reduce circle size, seaotter recommended adding more stabilizer tilt or tail boom offset, which can also contribute to stability in the presence of strong air conditioning.
• Trimming and Setting Basics:
  • Coach Chuck emphasized the importance of doing basic trimming, such as setting decalage, after making modifications for stability.
• Conservative Flying in AC:
  • Considering the strength of air conditioning, seaotter advised flying more conservatively to prevent mishaps, as a strong air current can significantly alter the plane's path and lead to collisions.
• Testing and Responsiveness:
  • seaotter mentioned the necessity of testing to determine how responsive the plane is to disruptions, which can help in deciding whether to fly cautiously or to attempt reaching maximum height.