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- Sailboat Guide
J/30 is a 29 ′ 9 ″ / 9.1 m monohull sailboat designed by Rod Johnstone and built by J Boats between 1979 and 1986.
- 2 / 9 Sea Bright, NJ, US 1983 J/30 $8,750 USD View
- 3 / 9 Sea Bright, NJ, US 1983 J/30 $8,750 USD View
- 4 / 9 Sea Bright, NJ, US 1983 J/30 $8,750 USD View
- 5 / 9 Sea Bright, NJ, US 1983 J/30 $8,750 USD View
- 6 / 9 Sea Bright, NJ, US 1983 J/30 $8,750 USD View
- 7 / 9 Sea Bright, NJ, US 1983 J/30 $8,750 USD View
- 8 / 9 Sea Bright, NJ, US 1983 J/30 $8,750 USD View
- 9 / 9 Sea Bright, NJ, US 1983 J/30 $8,750 USD View
Rig and Sails
Auxilary power, accomodations, calculations.
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL
Sail Area / Displacement Ratio
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64) 2/3
- SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D : Displacement in pounds.
Ballast / Displacement Ratio
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
Displacement / Length Ratio
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
Comfort Ratio
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )
- D: Displacement of the boat in pounds
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
Capsize Screening Formula
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
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Designed by Rod Johnstone in 1978, the J/30 was in production from 1979 through 1986, with 545 hulls built. The average selling price is $28,000. It takes a crew of seven to race the boat.
The J/30 is noted for heavy-air performance. It holds its own in moderate and light air as well, but really excels when its windier. The boat has several cruising amenities (standing headroom, enclosed head, large icebox, and hot water) for those who want to dual-purpose.
Many J/30s suffer from core rot due to water penetration around the chainplates, which could cost as much as $3,000 to professionally repair. New laminated racing sails should be approximately $9,000, but one-design class rules stipulate a Dacron main, reducing the cost.
J/30 http://www.J30.org Typical monthly costs: $852 Annual budget range: $2,000 to $12,000 PHRF 135 to 144 LOA 29’11” LWL 25′ Beam 11’2″ Draft 5’3″ Disp. 6,700 lbs. SA 460 sq. ft.
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Strange Glow Over Moscow Skies Triggers Panic as Explosions Reported
B right flashes lit up the night sky in southern Moscow in the early hours of Thursday morning, new footage appears to show, following reports of an explosion at an electrical substation on the outskirts of the city.
Video snippets circulating on Russian-language Telegram channels show a series of flashes on the horizon of a cloudy night sky, momentarily turning the sky a number of different colors. In a clip shared by Russian outlet MSK1.ru, smoke can be seen rising from a building during the flashes lighting up the scene.
Newsweek was unable to independently verify the details of the video clips, including when and where it was filmed. The Russian Ministry of Emergency situations has been contacted via email.
Several Russian Telegram accounts said early on Thursday that residents of southern Moscow reported an explosion and a fire breaking out at an electrical substation in the Leninsky district, southeast of central Moscow.
Local authorities in the Leninsky district told Russian outlet RBC that the explosion had happened in the village of Molokovo. "All vital facilities are operating as normal," Leninsky district officials told the outlet.
The incident at the substation in Molokovo took place just before 2 a.m. local time, MSK1.ru reported.
Messages published by the ASTRA Telegram account, run by independent Russian journalists, appear to show residents close to the substation panicking as they question the bright flashes in the sky. One local resident describes seeing the bright light before losing access to electricity, with another calling the incident a "nightmare."
More than 10 villages and towns in the southeast of Moscow lost access to electricity, the ASTRA Telegram account also reported. The town of Lytkarino to the southeast of Moscow, lost electricity, wrote the eastern European-based independent outlet, Meduza.
Outages were reported in the southern Domodedovo area of the city, according to another Russian outlet, as well as power failures in western Moscow. Electricity was then restored to the areas, the Strana.ua outlet reported.
The cause of the reported explosion is not known. A Telegram account aggregating news for the Lytkarino area described the incident as "an ordinary accident at a substation."
The MSK1.ru outlet quoted a local resident who speculated that a drone may have been responsible for the explosion, but no other Russian source reported this as a possible cause.
Ukraine has repeatedly targeted Moscow with long-range aerial drones in recent months, including a dramatic wave of strikes in late May.
On Sunday, Moscow Mayor Sergei Sobyanin said the region's air defense systems had intercepted an aerial drone over the city of Elektrostal, to the east of Moscow. No damage or casualties were reported, he said.
The previous day, Russian air defenses detected and shot down another drone flying over the Bogorodsky district, northeast of central Moscow, Sobyanin said.
There is currently no evidence that an aerial drone was responsible for the reported overnight explosion at the electrical substation in southern Moscow.
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Comparative investigations of aftersintering of UO 2 fuel pellets
- Theory and Processes of Formation and Sintering of Powdered Materials
- Published: 06 May 2010
- Volume 51 , pages 173–176, ( 2010 )
Cite this article
- V. V. Basov 1
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The basic parameters of comparative tests of UO 2 fuel pellets produced by the technology of powder metallurgy for aftersinterability using their repeated thermal treatment (aftersintering) in different gas media, namely, with and without humidification, are presented. The results of an evaluation of the level of aftersinterability of these pellets by different procedures is presented, they are analyzed, and a substantiation of the expediency of using this operation manual for evaluating afersintering without the humidification of the gas medium developed at the OAO Machine Building Works (MSZ), Elektrostal’, Moscow oblast, is presented.
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An Acceptable Model and Related Statistical Methods for the Analysis of Fuel Densification , US Nuclear Regulatory Commission, Regulatory Guide 1.126.1978.
Freshley, M.D., Brite, D.M., Daniel, I.L., and Hart, P.E., J. Nucl. Mater , 1976, vol. 62, pp. 138–166.
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Radford, K. and Pope, I., J. Nucl. Mater , 1977, vol. 64, pp. 289–299.
Radford, K., et al., US Patent 4430276, 1984.
Basov, V.V., Metodika provedeniya ispytanii tabletok is dioksida urana na “dospekaemost’ “ (Procedure for Performance of the Tests of the Pellets made of Uranium Dioxide for Aftersinterability), Electrostal’: PO MSZ, 1994.
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Bakhteev, A.N., Opredelenie termicheskoi stabil’nosti geometricheskikh razmerov toplivnykh tabletok tipa “V” i “R”: Metodika vypolneniya izmerenii (Determination of Thermal Stability of Geometric Sizes for Fuel Pellets of Types “V” and “R”: Procedure of Carrying out the Measurements), Moscow: VNIINM, 1992.
Basov, V.V., Opredelenie kharacteristik termicheskoi stabil’nosti toplivnykh tabletok tipov “R”, “R-E”, “V”: Metodika (tekhnologicheskaya instruktsiya) (Determination of Characteristics of Thermal Stability of Fuel Pellets of Types “R”, “R-E”, and “V”: Procedure (Technological Instruction), Electrostal’: OAO MSZ, 1999.
Kotel’nikov, R.B., Bashlykov, S.N., Kashtanov, A.I., et al., Vysokotemperaturnoe yadernoe toplivo (HighTemperature Nuclear Fuel), Moscow: Metallurgiya, 1978.
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OAO Machine Building Works, ul. K. Marksa 12, Elektrostal’, Moscow oblast, 144001, Russia
V. V. Basov
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Original Russian Text © V.V. Basov, 2009, published in Izvestiya VUZ. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya, 2009, No. 3, pp. 27–30.
About this article
Basov, V.V. Comparative investigations of aftersintering of UO 2 fuel pellets. Russ. J. Non-ferrous Metals 51 , 173–176 (2010). https://doi.org/10.3103/S1067821210020185
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Published : 06 May 2010
Issue Date : April 2010
DOI : https://doi.org/10.3103/S1067821210020185
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- fuel pellets
- model of fuel compaction
- repeated thermal treatment
- aftersintering
- aftersinterability
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- stoichiometric composition
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1981 J Boats J/30. US$15,134. ↓ Price Drop. Thunderbird Yacht Sales | West Vancouver, British Columbia. Request Info. <. 1. >. * Price displayed is based on today's currency conversion rate of the listed sales price.
J Boats J/30. Bayport, Minnesota. 1982. $17,999. J30 sailboat located in beautiful Bayport Marina on the St. Croix River. Ten Seven was built to race and cruise. She has been completely refinished on the exterior. The hull has been painted with Awlgrip.
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Wallace told Bob Johnstone afterward, "The J/30 is the best goddamned sailboat in the world for its Intended purpose. Only once did I get rolled down by a huge wave. And I've got coffee stains on the cabin overhead to show that it was 120 degrees." Long-term sales confirmed the J/30's market attraction.
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize. Formula. 30.02.
General. Obviously, the J/30 has ample space for distance cruising. We added an extra water tank next to the standard one, boosting our supply to 40 gallons. We sailed just about all the time, so the 14 gallons of diesel proved adequate. The addition of an engine-hour meter took the guesswork out of fuel consumption.
Designed by Rod Johnstone in 1978, the J/30 was in production from 1979 through 1986, with 545 hulls built. The average selling price is $28,000. It takes a crew of seven to race the boat. The J ...
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J/30 Used Boat Review. Posted April 5, 2017. In the late seventies opportunity knocked at boat builders' doors. It was calling for an offshore one-design boat that would offer high performance at an affordable price. Most major manufacturers of the day heeded the call. C & C Yachts introduced the Mega 30.
Sail Pack Kit - Standard Sunbrella® Color (13' Boom) Spinnaker Sock Kit 33' 1" to 36'. Foredeck Sail Bag Kit - Standard Sunbrella® Color (For Boats up to 30') Complete Sail Plan Data for the J/30 Sail Data. Sailrite offers free rig and sail dimensions with featured products and canvas kits that fit the boat.
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Elektrostal, city, Moscow oblast (province), western Russia.It lies 36 miles (58 km) east of Moscow city. The name, meaning "electric steel," derives from the high-quality-steel industry established there soon after the October Revolution in 1917. During World War II, parts of the heavy-machine-building industry were relocated there from Ukraine, and Elektrostal is now a centre for the ...
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B right flashes lit up the night sky in southern Moscow in the early hours of Thursday morning, new footage appears to show, following reports of an explosion at an electrical substation on the ...
The basic parameters of comparative tests of UO2 fuel pellets produced by the technology of powder metallurgy for aftersinterability using their repeated thermal treatment (aftersintering) in different gas media, namely, with and without humidification, are presented. The results of an evaluation of the level of aftersinterability of these pellets by different procedures is presented, they are ...
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