Thomas	Ryan	Drake	– Section	333	Exemption	Petition

January	20,	2015

U.S.	Department	of	Transportation,	Docket	Operations	

West	Building	Ground	Floor,	Room	w12-140	

1200	New	Jersey	Ave.,	SE	Washington,	DC	20590	

Re:	Exemption	Request	Section	333	of	the	FAA	Reform	Act	of	the	Federal	Aviation	

Regulations	from	14	C.F.R.	61.113(a)&(b);	91.7(a);	91.9(b)	(2);	91.109;119.121;	

91.151(a);	91.405(a);	91.407(a)	(1);	91.409(a)	(2);	91.417(a)&(b)

Dear	Sir	or	Madam:	

I,	Thomas	Ryan	Drake,	am	writing	pursuant	to	the	FAA	Modernization	and	Reform	Act	of	

2012	and	the	procedures	contained	within	14	C.F.R.	11,	to	request	that	I,	Thomas	Ryan	

Drake,	an	owner	and	operator	of	small	unmanned	aircraft,	be	exempted	from	the	

Federal	Aviation	Regulations	(“FARs”)	listed	below	so	that	I,	Thomas	Ryan	Drake,	may	

operate	a	small	ultra	light	weight	unmanned	aircraft	system	(“UAS”)	commercially	in	

airspace	regulated	by	the	Federal	Aviation	Administration	(“FAA”) located	in	Southern	

California	(specifically	in	Los	Angeles	and	Ventura	Counties) in	accordance	with	FAA	UAS	

Regulations	&	Policies.

This	exemption	request	is	made	based	on	information	outlined	in	this	petition,	as	well	

as	the	accompanying	DJI	Phantom	Vision	2+	Operators	Manual1 and	Personal	Protocols	

and	Controls2.	The	DJI	Phantom	Vision	2+	UAS	was	selected	because	it	has	a	proven

capability	for	controlled	flight	as	well	as	a	gyro	stabilized	flight	mode,	GPS	aided	

navigation,	a	compass,	blinking	LED’s	on	the	bottom,	a	failsafe	mode	for	returning	

home,	and	prop	guards.	These	devices	are	offered	for	general	sale	around	the	world	and	

have	often	been	used	as	Model	Aircraft	in	the	USA.	In	addition,	I,	Thomas	Ryan	Drake,	

have	flown	UAS’s	in	a	recreational	capacity	since	2013	and	have	adopted	safety	

protocols	and	controlsto	avoid	and	prevent	public	hazard,	as	well	as	manned	aircraft

hazards/catastrophe.	This	will	act	to	further	safety	protocols	exclusive	to	lightweight

UAS's	specific	to	video	and	photography	usage	as	I,	Thomas	Ryan	Drake, record	flight	

data	and	other	information	gained	through	permitted	flight	operations	to share	with	the	

FAA	through	any	required	FAA	reports	to	assist	with	future	protocol	and safety	

regulation.

I.	Contact	Information

Thomas	Ryan	Drake

DBA	six6one	Development

28388	Maitland	Ln.

																																																							 1 Appendix	A	– DJI	Phantom	2	Vision+	Operator’s	Manual 2 Appendix	B	– Personal	Protocols	and	Controls 2 Appendix	B	– Personal	Protocols	and	Controls
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

Santa	Clarita,	CA

Mobile:	(661)	313-5858

Email:	drake@six6one.com

II.	Information	regarding	the	Phantom	2	Vision+	UAS

Specifically,	the	UAS	is:	

An	ultra	lightweight battery	operated	4-motor	rotorcraft	in	the	form	of	a	quadcopter	

that	takes	off	and	lands	vertically,	manufactured	by	DJI,	Model	Phantom	2 Vision+,	with	

the	following	equipment:	

• An	on-board	flight	computer	with	GPS	navigation	and	location	ability	that	

receives	signals	for	flight	controls	from	a	ground-based	transmitter/controller;	

• An	integrated	on-board	camera	capable	of	capturing	imagery	in	the	form	of	full	

color,	high	definition	still	photos	and	video;	

• An	on-board	telemetry	system	that	delivers	flight	data	from	the	on-board	flight	

computer	to	the	on-board	radio	transmitter	including	altitude	AGL,	horizontal	

and	vertical	speed,	compass	direction	of	flight	and	direction	back	to	its	launch	

site;	

• A	600mW,	5.8GHz	on-board	radio	transmitter	that	transmits	live	video	from	the	

on-board	camera	plus	all	the	flight	data	from	the	telemetry	system	described	

above;

The	Ground	Station	Includes:	

• A	Pilot	in	Command	(PIC)	in	operational	control	of	a	flight	operation	from	

beginning	to	end	and	who	controls	the	UAS	while	in	the	air;	

• A	100mW,	2.4GHz	radio	transmitter/controller	operated	by	the	PIC	to	control	

the	UAS	while	in	flight;	

• A	radio	receiver	receiving	live	video	and	flight	data	from	the	on-board	camera	

and	computer	projects	it	all	together	onto	a	screen	for	the	PIC	to	view	during	

flight;	

• A	Visual	Observer	(VO)	is	a	person	who	provides	a	second	pair	of	eyes	to	visually	

track	the	UAS	while	in	flight.	

III.	Proposed	Operations

I,	Thomas	Ryan	Drake,	intend to	use	UASs in	two	areas.	First,	I	seek an	exemption	to	

perform	video	filming	and	photographing	by	air	for	public	and	private	use. Second,	I will	

employ	UAS’s	to	inspect	land,	residential	commercial	and	industrial	structures and	

property.
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

Specifically,	I will	use	UASs	which	are	equipped	with	cameras	and	sensors,	in	order	to	

engage	in	the	following	commercial	activities in	Los	Angeles	and	Ventura	Counties:	

(a)	Video	filming	by	air	and	photographing	for	public	and	private	purposes,	

including:	television,	cinematography,	advertising	or	promotions. Filming	and	

Photography	will	only	be	conducted	with	permission	and	under	contract	with	

registered	owners	or	with	any	local	government	authority	and	only	when	safe	to	

do	so.

(b)	Video	filming	by	air	and	photographing	to	support	professional	operations	in	

engineering,	land	surveying and	development,	architecture,	real	estate	and	

other	related	professional	activities.	Filming	and	Photography	will	only	be	

conducted	with	permission	and	under	contract	with	registered	owners	or	with	

any	local	government	authority	and	only	when	safe	to	do	so.

(c)	Inspection by	air	of	infrastructure	such	as	bridges,	highways,	photovoltaic	

power	stations,	and	pipelines.	These	inspections	will	only	be	done	under	

contract	and	permission	with	any	registered	owners	or	with	any	local	

government	authority	and	only	when	safe	to	do	so.

(d)	Inspection	by	air	of	land	and	residential,	commercial	and	industrial	

structures,	only	under	contract	and	permission	with	any	registered owners	or	

with	any	local	government	authority	and	only	when	safe	to	do	so.

(e)	Support	provided	to	search	and	rescue	operations	and	reconnaissance	in	

cases	of	need,	emergency	or	natural	disasters	only	when	government	authorities	

have	requested	it	by contract	or	donation	and	only	when	safe	to	do	so.

IV.	Relevant	Statutory	Authority	

This	Petition	for	Exemption	is	submitted	pursuant	to	Section	333(a)	through	(c)	of	the	

FAA	Modernization	and	Reform	Act	of	2012	("Reform	Act").	Congress	has	directed	the

FAA	"to	safely	accelerate	the	integration	of	civil	unmanned	aircraft	systems	into	the	

national	airspace	system."	Pursuant	to	Section	333	of	the	Reform	Act,	the	FAA	

Administrator	is	to	permit	unmanned	aircraft	systems	to	operate	in	the	National	Air	

Space	("NAS")	where	it	is	safe	to	do	so	based	on	the	following	considerations:	

• The	UAS’s	size,	weight,	speed	and	operational	capability;	

• Operation	of	the	UAS	in	close	proximity	to	airports	and	populated	areas;	and

• Operation	of	the	UAS	within	the	visual	line	of sight	of	the	operator.	

Additionally,	the	FAA	Administrator	has	general	authority	to	grant	exemptions	from	the	

agency's	safety	regulations	and	minimum	standards	when	the	Administrator	decides	a	

requested	exemption	is	in	the	public	interest.	See	49	U.S.C. §	106(f)	(defining	the	
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

authority	of	the	Administrator);	49	U.S.C.	§	44701(f)	(permitting	exemptions	from§§	

44701(a),	(b)	and§§	44702-44716,et	seq.).	A	party	requesting	an	exemption	must	

explain	the	reasons	why	the	exemption:	(1)	would	benefit	the	public	as	a	whole,	and	(2)	

would	not	adversely	affect	safety	(or	how	it	would	provide	a	level	of	safety	at	least	

equal	to	the	existing	rules).	See	14	C.F.R.	§	11.81	(petitions	for	exemption).

V.	These	Proposed	UAS	Operations	Meet	the	Requirements	of	Section	333	of	the	

Reform	Act	

The proposed	operations	in	this	Petition	for	Exemption	qualify	for	expedited	approval	

pursuant	to	Section	333	of	the	Reform	Act	as	each	of	the	statutory	criteria	and	relevant	

factors	are	satisfied.	

VI.	Approval	is	Warranted	Based	on	the	UAS	Size,	Weight,	Speed,	and	Operational	

Capability	

I,	Thomas,	Ryan	Drake,	will	employ	the	DJI	Phantom Vision 2+	quadcopter for	the	

operations	specified	in	this	Petition	for	exemption.	

• The	Phantom	2	Vision+ UASs	have	a	maximum	take-off	weight	of	less than	5

pounds

• Flight	speed	will	not	exceed	15 miles	per	hour,	and	it	will	not	be	flown	in	

controlled	airspace	or	at	an	altitude	that	exceeds	300	feet	AGL.	

• All	flights	will	be	flown	in	such	a	manner that	they	can	be	safely	terminated	with	

a	reserve	battery	power	of	no	less	than	20%	of	the	battery's	maximum	charge.	

• The	DJI	Phantom	2	Vision+ UAS	does not	carry	any	flammable	propellant	or	fuel.	

• The	Phantom	2	Vision+ UAS	has	an	integrated	GPS	system	that	calculates	the	

UAS’s	position	and	height	and	relays	that	information	via	a	secure	connection	to	

the	operator.	

• The	Phantom	2 Vision+ UAS	contain	a	failsafe	mode	if	its	connection	to	the	

remote	control	is	lost,	and	this	system	permits	the	UAS	to	return	to	a	

predetermined	location	and land	without	injury	or	damage.

• For	additional	safety,	the	Phantom	2	Vision+ will	be	retrofitted	with	prop	guards.	

VII.	Approval	is	Warranted	Based	on	the	Operational	Restrictions	Set	Forth	in	the	

Operations	Manual.	

DJI's	operators	manual3 and	the	Personal	Protocols	and	Controls4 contain	all	of	the	

procedures	and	limitations	necessary	to	successfully	perform	the	operations	specified	in	

this	Petition	for	Exemption.	

																																																							 3 Appendix	A

4 Appendix	B
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

VIII.	Public	Interest

The	public	interest	will	be	served	by	granting	Thomas	Ryan	Drake	a Petition	for	

Exemption in Los	Angeles	and	Ventura	Counties.	Congress	has	established	a	national	

policy	that	favors	early	integration	of	UASs	into	the	NAS	in	controlled,	safe	working	

environments	such	as	those	proposed	in	this	Petition.	In	addition,	the	public	also	has	an	

interest	in	reducing	the	hazards	associated	with	alternate	methods	of	conducting	similar	

operations.	Currently	operations	are	conducted	using	teams	that	physically	climb	onto	

structures	using	ladders,	using	low	flying	helicopters	or	aircraft,	are	extremely	cost	

prohibitive	or	are	simply	not	available	by	traditional	means.	By	using	UAS,	exposure	to	

physical	hazards	will	be	reduced	by conducting	the	operation	while	remaining	safely	on	

the	ground.	

Additionally,	the	intended	uses	of	the	Phantom	2	Vision+ UAS	as outlined	in	this	

document	have	identifiable	safety	benefits	that	include	reducing	the	danger	and	

emissions	associated	with	full	size	helicopters. UAS	have	no	fuel	to	ignite	or	explode,	no	

crew,	add a	greater	degree	of	flexibility,	supplement the	current	capabilities	offered	by	

manned	aircraft,	and	public	interest	for	a	ground	impact	of	a	small	lightweight	UAS	is	

further	minimized	from	an	ecological	and	safety	standpoint.	

IX.	A Summary	The	FAA	May	Publish	in	the	Federal	Register:

A.	14	C.F.R.	91:	Airworthiness	Certificates,	Manuals	and	The	Like.

14	C.F.R.	91.7(a)	I,	Thomas	Ryan	Drake,	will	ensure	the	UAS	is	in	airworthy	

condition	based	on	compliance	with	the	Phantom	2	Vision+	operating	

documents	prior	to	each	flight.

14	C.F.R.	§	91.121	Relief	is	requested	considering	the	limited	altitude	of	

proposed	operations.

B.	14	C.F.R.	§	61.113:	Private	Pilot	Privileges	and	Limitations:	PIC.

Pursuant	to	14	C.F.R.	§ 61.113	(a),	The	FAA	has	previously	declared	that	

additional	manned	airship	experience	of	a	commercially	certified	pilot	would	not	

correlate	to	the	airmanship skills	necessary	for	similarly	proposed	operations	in	

previously	issued	exemptions	to	this	regulation	through	Exemption	Nos.	11062	

and	11138.

Pursuant	to	14	C.F.R.	§	61.113	(b),	The	stick	and	rudder	controls	of	the	typical	

aircraft	one	would	be	trained	on	to	achieve a	private	pilots	license	are	

completely	different	than	that	of	a	small	UAS.	Additionally, the	FAA does	not	

require	manned	ultralight	vehicle	PICs	to	meet	any	aeronautical	knowledge,	age,	

or	experience	requirements	or	to	have	airman	or	medical	certificates (as	
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

outlined	in	14	C.F.R.	§	103). Ultralight	vehicles	can	weigh	more	than	500	pounds	

than	the	Phantom	2	Vision+,	can	carry	up	to	5	gallons	of	combustible	fuel,	and	fly	

at	speeds	close	to	double that	capable	by	the	Phantom	2	Vision+.	Due	to	these	

facts, and	in	the	absence	of	a	specific	UAS	Pilot	License, I	submit	that	prior	to	any	

commercial	operations	I,	Thomas	Ryan	Drake,	will	obtain	a	Student	Pilot	

Certificate	and	complete	a	basic	aviation	introduction	course, with	45 minutes	of	

logged	flight	time,	applied	by	a	certified	flight	instructor. In	addition	I	submit	32	

plus	hours	of	UAS	logged	flight	time	I	have	acquired	over	the	past	two	years5.

D.	14	C.F.R.	91.119 (c):	Minimum	Safe	Altitudes.

14	C.F.R.	§	91.119	(c)	I,	Thomas	Ryan	Drake,	will	ensure	that	all	persons	and	

objects	not	essential	to	flight	operations	must	remain	500	feet	away	from	

operations.	In	addition	to	visual	monitoring	of	the	area,	a	traffic	cone	and	

warning	sign6 alerting	persons in	the	area	will	be	placed	at	the	operation	ground	

station.	To	protect	objects	and	personnel	essential	to	flight	operations	the	

Phantom	2	Vision+	will	be	fitted	with	propeller	guards	and	safety	wire7 to	

minimize	potential	hazards.

E.	14	C.F.R.	91.151	(c):	Fuel	Requirements	for	Flight	in	VFR	Conditions.

14	C.F.R.	91.151	(c),	I,	Thomas	Ryan	Drake,	will	ensure	that	each	individual	flight	

will	not	begin	unless	there	is	enough	power	to	fly	to	the	first	point	of	intended	

landing	and	land	the	UA	with	30%	battery	power	remaining.	In	addition,	each	

individual	flight	will	last	no	longer	than	20	minutes,	5	minutes	less	than	the	

manufacturer	stated	25	minutes	of	flight	time.

F.	14	C.F.R.	91.405	(a);	407	(a)	(1);	409	(a)	(2);	417(a)	&	(b):	Maintenance	Inspections.

The	above-cited	Regulations	require,	amongst	other	things,	aircraft	owners	and

operators	to	“have	[the]	aircraft	inspected	as	prescribed	in	subpart	E	of	this	part	

and shall	between	required	inspections,	except	as	provided	in	paragraph	(c)	of	

this	section, have	discrepancies	repaired	as	prescribed	in	part	43	of	this	chapter.	

.	.	.”

These	Regulations	only	apply	to	aircraft	with	an	airworthiness	certificate.	They	will	not,

therefore,	apply	to	my,	Thomas	Ryan	Drake’s,	UAS.	However,	as	a	safety	precaution	I	

inspect	my UAS per	operating	documents	before	and	after	each	flight.

																																																							 5 Appendix	C – Drake	UAS Flight	Logs 6 Appendix	D – Warning	Sign 7 Appendix	E – Phantom	2	Prop	Guard	Attachment	Instructions
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

X.	Conclusion	

This	Petition	for	Exemption	satisfies	the	criteria	articulated	in	Section	

333	of	the	Reform	Act	of	2012	including	weight,	speed,	operating	capabilities,	proximity	

to	airports	and	populated	areas,	operation	within	visual	line	of	sight	and	national	

security.	Additionally,	the	Petition	provides	more	than	adequate	justification	for	the	

grant	of	the	requested	exemptions	to	permit	Thomas	Ryan	Drake	to	operate	a	Phantom	

Vision	2+ Plus	UAS in	Los	Angeles	and	Ventura	Counties for	the	operations	specified	

herein.	

Granting	the	exemption	will	benefit	the	public	interest	as	a	whole	in	several	ways,	

including	(1)	significantly	improving	safety	and	reducing	risk	by	alleviating	human	

exposure	to	danger,	and	(2)	improving	the	quality	of	services	and	decreasing	operating	

costs	compared	with	conventional	flight	operations.	

Very	Respectfully,	

Thomas	Ryan	Drake

28388	Maitland	Ln.

Santa	Clarita,	CA	91350

drake@six6one.com
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

Appendix	A

DJI	Phantom	Vision	2+	Manual

Separate attachment

Also	available	at	http://www.dji.com/product/phantom-2-vision-plus/download
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

Appendix	B

Protocols	and	Controls
Protocols	and	Controls

Safety	protocols	and	controls	for	UAS	flights

Thomas	Ryan	Drake – six6one	Develpoment Page	1 of	2

Safety	for	public	on	the	ground	as	well	as	manned	aircraft	above	is	an	essential	and	

utmost consideration	for	aerial	videos	and	photography.	As	such,	these	safety	

protocols	and	controls	must	be implemented	through	pre-flight	preparation	and	

during	flight.

Pre-Flight	Protocol:

• Check	batteries	with	voltage	meter	to	insure	fully	charged	and	ready	for	use.

• Inspect	batteries	for	damage	or	leakage	that	may	affect	proper	operation.

• Inspect	propellers	for	cracks,	chips	or	damage	that	may	cause	sudden	loss	of	

propulsion	or unmanageable/uncontrolled	flight.

• Check	weather	forecasts	for	wind	advisory	or	other	conditions	that	my	

impact	flight.

• Consult	five	(5)	mile	radius	map	for	airport	vicinity.

o Contact	respective	airport	to	advise	of	estimated	flight	time,	estimated	

flight	duration,	estimated	elevation	of	flight,	and	any	other	pertinent	

information.

• Inspect	flight	area	for:

o vicinity	of	public	safety	helipads/heliports

o vicinity	of	medical	helipads/heliports

o vicinity	of	light	poles

o vicinity	or	utility	wires

o vicinity	of	trees

o flocks	of	birds	that	may	cause	interference	and	potential	flight	impact

o vicinity	of	any	elevated	obstructions	that	may	pose	potential	flight	

hazard

o vicinity	of	roadways	with	moderate	to	heavy	traffic	that	can	be	

distracted

o public	gatherings	that	may	attract	viewers

o optional	point	of	control	for	best	visual	site	of	UAS	while	in	flight

• Takeoff	and	landing

o inspect	area	for	best	and	safest	point	of	takeoff	and	landing

o locate	a	secondary	landing	area	in	case	of	emergency

o if in	a	subdivision	or	area	that	is	within	150	feet	of	a	residential	street,	

post	warning

o sign(s)/stand(s)	"Caution	- Aerial	Photography	In	Progress	– Keep	

Back	150	Feet	"
Protocols	and	Controls

Safety	protocols	and	controls	for	UAS	flights

Thomas	Ryan	Drake – six6one	Develpoment Page	2 of	2

Flight	Protocol:

• Takeoff	and	land	from	same	location

• Remain	alert	to	birds,	sound	or	aircraft,	curious	public,	and	approaching	

vehicles

• Do	not	allow	anyone	to	engage	in	conversation	or	distract	the	remote	control	

pilot

• Restrict	flight	to	minimal	elevation	sufficient	to	acquire	desired	results

• Remain prepared	for	emergency	landing	at	all	times

• Pay	attention	to	flight	time

o If	possible	set	a	timer	as	a	safety	alert

• Land	UAS	and	shut	down	propulsion	immediately	following	landing

Post	flight:

a) Disconnect	battery	to	prevent	accidental	activation	of	propulsion	system

b) Secure	UAS	in	a	safe	location

c) Remove	all	warning	signs	from	public	access	areas

Emergency	or	Suspected	Hazard:

• Immediate	land	UAS	at	safest	and	closet	ground	location	in	the	event:

o manned	aircraft	is	heard	or	seen	in	vicinity	of	flight

o there	is	a	public	gathering	within	established	safety	boundary	

wanting	to	observe	flight

o pilot	is	being	distracted	from	focusing	on	flight	and	safety

o sudden	change	in	weather	(e.g. wind	bursts)

o sudden	increase	in	vehicular	traffic	in	vicinity	of	flight

o birds	enter	into	proximity	of	flight

o any	sudden	unsafe	event	that	can	cause	collision,	distraction	or	

interruption	of	control
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

Appendix	C

Drake	UAS	Flight	Logs







Thomas	Ryan	Drake	– Section	333	Exemption	Petition

Appendix	D

Warning	Sign
AERIALFILMING

INPROGRESS

STAYBACK150FT.
Thomas	Ryan	Drake	– Section	333	Exemption	Petition

Appendix	E

Phantom	2	Prop	Guard	

Attachment	Instructions	V1.00
 ©2013-2014 DJI Innovations. All Rights Reserved. | 

PHANTOM 2 Prop Guard Attachment Instructions V1.00

PHANTOM 2 桨保护器安装说明 V1.00

Please follow the below instructions to attach your Phantom 2 Prop Guards.

请按照下面步骤安装桨保护器。

1. Gather together the Phantom 2, Prop Guards (4), M3x12 screws (8), thread and an Allen key.

准备 PHANTOM 2 飞行器,桨保护器(4 个),M3x12 螺丝(8 颗),保护线,内六角螺丝刀。

2. Remove the M3x8 screws under each of the four motors (Fig.1).

按照图 1 所示,使用螺丝刀卸下原 PHANTOM 2 四个电机上的 M3x8 螺丝。

3. Place the Prop Guards and attach them with the M3x12 screws (Fig.2). Tighten as required. Do this for all four 

Prop Guards. Do not use thread lock. 

按照图 2 所示,适当用力拧紧 M3x12 螺丝,装好四个 PHANTOM 2 桨保护器。不可以使用螺丝胶。

4. Improve protection further by attaching a thread through the Prop Guards. This thread should go under the 

Prop Guards (Fig.3). 

按照图 3 所示,为起到更好的保护作用,将保护线连到桨保护器上,注意穿线时将线绕在桨保护器底部。

IMPORTANT: M3x12 screw is only for Prop Guard assembly. Without a Prop Guard, use M3x8 screw to avoid 

damaging the motor. 

注意: 此处安装桨保护器,使用型号为 M3x12 的螺丝;如果没有安装桨保护器,只能使用型号为 M3x8 螺

丝。否则,过长的螺丝会损坏电机。

Fig.1 Removing Screws/图 1 卸下原螺丝 Fig.2 Prop Guard Attachment/图 2 安装桨保护器

Fig.3 Complete/图 3 正确安装示意图

Specifications/参数 

Weight (Single)/重量(单个):21g

Angle/角度:150.0o

Radius/半径:128.25mm

Whole Size with Four Prop Guards/安装后

最大外形尺寸:613mm