Your Personal CFI,
Between Lessons.
The CFI you can ask anything, anytime — grounded in your aircraft and the real FAA sources
Trained On PHAK · AFH · AIM · FARs · POHs
Arien
Online
Pulling up the KAPA RNAV (GPS) RWY 35R plate now — let's brief it top to bottom.
Approach setup
- Final approach course 350°, 3.10° glidepath
- LPV DA 6,085 ft (200 ft HAT) — needs WAAS, MALSR lights
- LNAV/VNAV DA 6,324 ft (439 ft HAT) — temp restricted
- LNAV MDA 6,380 ft (495 ft HAT)
- TDZE 5,885 ft — Denver elevation, so density altitude matters for your go-around performance
Key fixes
- XBEEE is your IAF — sequence the approach there at 9,000 ft
- FIRPI is the IF, also 9,000 ft
- JIDOG is the FAF — cross at 8,000 ft
Things to flag for tomorrow
- Do not exceed 240 KIAS until BPUTN on the missed
- Circling to Rwy 35L NA at night
- Missed approach: climb to 8,200, then climbing left turn to 9,600 direct BPUTN and hold
Want to dig into the missed first, the LNAV/VNAV temp restriction, or the equipment requirements for the LPV line?
Meet Your Instructor
It's 11 PM.
Your checkride is Thursday.
You just read something about density altitude that doesn't click. Your instructor went home hours ago.
Arien searches the actual FAA publications, finds the relevant passages, and explains them in plain English — with the source material right next to the answer.
In Class E airspace, VFR cloud clearance depends on altitude1:
Below 10,000 MSL:
- 3 SM visibility
- 500 ft below, 1,000 ft above, 2,000 ft horizontal
At or above 10,000 MSL:
- 5 SM visibility
- 1,000 ft below, 1,000 ft above, 1 SM horizontal2
Show Your Work
Every answer
cites its sources.
Aviation doesn't do “trust me.” Neither does Arien.
Click any citation badge to open the source panel — see the exact regulation, handbook section, or AIM paragraph that backs the answer. Read it yourself. Verify everything.
No black box. No hallucination. Just the same references your CFI would point you to, found in seconds instead of hours.
Your Knowledge Base
Teach Arien
your airplane.
Upload your POH, training syllabus, or school's stage check guide. Arien reads every page, indexes every section, and remembers it all.
Ask about your V-speeds, your weight & balance limits, your school's requirements. Arien pulls directly from your documents and cites the exact section.
Generic AI gives you textbook answers. Arien gives you answers about your airplane.
Section 1 — Limitations
Airspeed Limitations
The following table shows the airspeed limitations and their operational significance.
| Speed | KIAS | Remarks |
|---|---|---|
| VNE — Never Exceed | 163 | Do not exceed in any operation. |
| VNO — Max Cruise | 128 | Smooth air only above this speed. |
| VA — Maneuvering | 99 | No abrupt control inputs above this speed. |
| VFE — Max Flap Extended | 110 / 85 | 10° flaps: 110 KIAS · 10°–30° flaps: 85 KIAS |
I'm at 90 KIAS on final for short-field practice — can I drop full flaps yet?
Real Conversations
Three students.
Three real conversations.
Switch between three real moments in a student's training. Every citation, every source, every word — just like the real thing.
The Old Way
Sixteen hundred pages,
scattered across five books.
Density altitude is in the PHAK. The MEA/MOCA distinction is buried in the AIM. Your aircraft's V-speeds are in a POH that isn't even searchable. Your school's syllabus is in a binder back at the FBO.
Arien has read every page of every one. Ask anything — get the answer in seconds, with the source one click away.
Knows you.
Your aircraft. Your airport. Your training stage. Every answer is shaped by what you're actually flying.
Cites everything.
Grounded in PHAK, AFH, AIM, FAR/AIM, and the ACS. The source panel is one click away on every answer.
Always there.
11 PM before your flight. 6 AM before your written. Sunday afternoon when your CFI isn't reachable.
Simple Pricing
Pricing Built
For Student Pilots.
Less than a single CFI ground lesson — for an entire month of unlimited time with one.
Free
I want to try Arien before I commit.
- Core aviation knowledge base
- FAA handbook access
- 7-day chat history
Pilot
I'm in active training and I want a CFI I can ask anything.
- Everything in Free
- Full knowledge base (FAA, POH, AIM)
- Source citations on every answer
- Unlimited chat history
- Chat file attachments
- Upload your POH & syllabus
Checkride Ready
One-time purchase
My checkride is in the next 90 days. I need to be ready.
- Everything in Pilot
- Unlimited messages
- Upload up to 10 documents
- Mock oral exam mode
- Checkride prep mode
- Custom study plans
- Priority response speed
What You're Actually Buying.
- Your CFI charges $60–100 an hour for ground instruction. That's $20 for every 12–20 minutes of their time.
- Pilot gives you a CFI you can ask anything, anytime, for 30 days — for the price of 12 minutes of ground school.
- Checkride Ready is mock orals and unlimited prep for 90 days — for less than a single hour of dual instruction.
Ready For Takeoff?
Your next study session
starts here.
Free to start. No credit card required. Just your questions and an AI instructor that knows every handbook cover to cover.